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Not good. The noises have two reasons: one is traffic; another is ventilator. I can't sleep with the noises. The smell of paint can be smelled out, even two weeks after I moved in. The door can't be move smoothly. The… Full Review ▶
I have had a good experience living at the Congressional Towers apartment, it is convenient to many shopping, entertainment and metro. The staff at the leasing office is responsive, helpful and have been understanding when I've requested assistance. Full Review ▶
I enjoy living in this community, except shortage of parking spaces. I see a lots of open visitor spaces every day, Pease consider residents can use free visitor parking space after certain time. If possible please provide post box key for… Full Review ▶
Everything has been good so far in the first month since moving in. However, there have been small annoyances: the fuse for the refrigerator intermittently goes out; the garbage disposal clogged for day; and the bottom lock seems not to lock… Full Review ▶
Good place to live. Near NIH. Friendly staffs. Prompt maintanence. Very quiet. Great play area for children. Kitchen equipments in good condition. easy move in procedure. Neighborhood is great.I will recommend this place to my friends. Full Review ▶
I wish there were more activities in the community, not just a movie every 6 weeks for the children. The noise level is very good for so many people in one building. It is very clean, but the amount of destruction… Full Review ▶
The community is good, neighborhood is neat and safe. The apartments are good but not excellent, the lobby and the hall ways could be better. I feel the rent is little high and for the rent they charge I expect better… Full Review ▶
We've been living here for more than three years. To be fair, everything's quite great with this place, that is, until we have our current tricky evening noise issue.I have done everything I could including communicating with the staff constantly and… Full Review ▶
We decided we wanted to move to Rockville after living in Silver Spring and being dissatisfied. Congressional was the first apartment we looked at and immediately knew that is where we wanted to move. It is convenient yet quiet and the… Full Review ▶
Decent buildings with quality amenities. Maintenance is responsive. Can't beat the location for the price. Distance to metro about 12 minute brisk walk. Con: lacks a no smoking policy; we have an infant and have to keep the windows closed. Full Review ▶
I have been a resident of the community since almost 3 years. It is a great place to live, great neighborhood and very accessible to shopping, restaurants. Great recreational areas. Congresssional Towers has been great and swift in handling maintenance issues.… Full Review ▶
Very nice apartment, closer to Metro station, Shopping complexes are nearby. Very calm place, have sufficient parking lots, but the visitor parking area lots aren't close to the entrances. very good community near by metro, Utility are good Full Review ▶
my apartment home and experience as a resident at this community as compared to any other apartments, Exterior lighting of building entryways, community common areas, parking areas, and sidewalks, Speed and quality that service requests are handled by the maintenance staff… Full Review ▶
Very good place. Very close to several markets including best buy, bedbathbeyond, fresh market, trader Joe, and hhgregg etc... It takes about 15 minutes to get metro (twinbrook station). A lot of old trees and forest make us feel good always.… Full Review ▶
Congressional Towers is a great place to leave. I like it the apartment as it was the center of every thing like shopping and best schools of Maryland. But one thing I observed on last Sunday night ( August 11) almost… Full Review ▶
Nice apartments. Safe and apartment management do their job making this place better. Love they hold community events. Regarding shopping, you will find any shops you need not so far from here. Nice restaurants people around here. Enjoying living here.kjj Full Review ▶
Overall I have satisfaction(Especially, School, convenient access to shopping, public transportaion, community common areas). But, Landary/dryier noisy is too loud. When refrigerator was operated in the nighter, it's noisy is too loud. Full Review ▶
Horrible ongoing experience with lazy inadequate staff. How is it that renovations are going on EVERY DAY but the place still looks like ----? I am literally counting the days until I can move out. UPDATE: IF ANYONE NEEDS A LAWYER… Full Review ▶
As of now, nothing negative. Apartment units where I live is good. Locality is awesome including access to public transport, public parks, library and school facilities..... However, if there is little fencing can be done for the ground floor patios, it… Full Review ▶
completely dissatisfied due to recent ignorance by the apartment management. I will not recommend Congressional Towers to anyone. We always here noise, another thing is that staff for maintenance is not responsive. They only care about to renew the rental agreement,… Full Review ▶
So far so good. I had nothing bad to say or highlight about the apartment. The only thing that concerns a little bit is the parking after 9:00 pm, because usually is completely full by this hour. The spaces available for… Full Review ▶
I have just recently moved in and only spent one night in the unit. I do not feel as though I can adequately describe an experience at this time. However, I can say that choosing this apartment was due to the… Full Review ▶
I've lived in four places in Rockville/Gaithersburg since moving to MD from NY, and this has been my favorite. Mostly it has to do with living on the top floor (no more stomping above our heads), but the residents living here… Full Review ▶
The maintainance service is so slow. For example, I made a service request for pedestal pan's blockage at about 7am on Sep. 3, no worker came to address it. So I made the same request again at about Sep. 6th, till… Full Review ▶
Over the years we have been satisfied. We have had issues, but they have always worked the issues out. We need to have the place painted, but we have to agree to what we want done first. The rugs also need… Full Review ▶
I love it here! Property is clean, staff is amazing. Great location, great amenities, I love the gym here at this property. It would be better if the units had a washer and dryer but I can accommodate my trips to… Full Review ▶
thank you for your generous thank you for your generous thank you for your generous thank you for your generous thank you for your generous help thank you for your generous thank you for your generous thank you for your generous… Full Review ▶
The overall experience of living in this community is OK. Except that some time the maintenance staff in the office is not that friendly and my apartment has some insects issue maybe it is nearby the garbage disposal room. The community… Full Review ▶
I subleased and moved in the congressional towers apartment on 6/1/2013. The original leasing period is from 1/1/2013 to 12/31/2013. I didn't receive my lease until November because they were slow on processing the new contract to reflect they received $250… Full Review ▶
This is great place to live. It is very quite, and people are respecful. I have recommended it to my friends. I just wish some of the apartments to have two badrooms. The leasing office is very efficient, and I like… Full Review ▶
I satisfy my place absolutely because all neighborhood and staff are very kind. And the known persons are living in same apartment, so I feel better. Most of all, some public transports and my workplace are near the apartment, so very… Full Review ▶
The apartment complex is well tended, the grounds are very nice and the buildings are kept clean and neat. I find the tenants to be somewhat unfriendly which is a shame. I am quite comfortable in my unit, it is spacious… Full Review ▶
I moved in recently. The apartment is generally O.K. But, the Staffs need to be knder to residents. Noise from upstairs is also be a matter. Surveys for reducing the noisy should be done regularly. Also parking space need to add… Full Review ▶
poor slow removal of snow in parking area. Maintenance for repairs is slow. Best benefit is all utilies are included. Number of laundry machines are limited. Hallway has no air circulation and feels stuffy and food smells from residents cooking in… Full Review ▶
New tenant - am very pleased thus far! Rainey Murdoch was super helpful and attentive to our concerns and needs, as we came from ABQ, NM everything was sight unseen, but glad we chose the Congressional Towers. Very much like everything!… Full Review ▶
Parking is a big problem to us if we go home after 8:00 pm. We have seen lots of visitors parking at our residential spots especially on weekends. It already causes us problems because I have evening classes. We have heard… Full Review ▶
It is a quiet and friendly community, the commom areas are always clean and the staff is very gentle. About the maintainance service, I have nothing to complain about, the staff is really efficient!I love living here in Congressional Towers! Full Review ▶
It has been a wonderful time staying here. The community is clean, quiet and well maintained. Any calls for rare concerns that we have are adequately responded to and the concerns are addressed to our satisfaction. In short, this is a… Full Review ▶
I am satisfied with living here. Neighbors are kind to us and All staffs are eager to help us solve problems. Gymnasium is well equipped with excercisers. I think only one problem is that these days there are enough parking lot… Full Review ▶
Our experience in this community has been great! We mainly chose this apartment as the kids school is very near, there is convenient access to shopping, public transportation, etc. We feel very safe and secured. Staff does a great job in… Full Review ▶
Parking becomes a big deal now sine Rollins and Congressional (the same big company) that gratefully shared the same no restrictions and no limit guest parking space till now started to cause a lot of problems. NOW they separated the parking… Full Review ▶
Only the carpet and not to have wash machine/dryer are a real problem. Parking is now more difficult. Maintenance and cleaning staff are very friendly. Nice view and very quiet environment. Definitive a good place to live. Just maybe a little… Full Review ▶
The good things: It is 15 minutes walking to Twinbrook metro station and close to many shops on Rockville Pike. Utilities are included in rent. They have a 10% discount for NIH employees if you sign a 12 month contract. It… Full Review ▶
Here is a decent community, not bad, and close to many shopping malls. Full Review ▶
BEWARE, FAKE REVIEWS TO IMPROVE RATING!!! Yes, there are ways to do it even though the review says its coming from a "verified resident". Ratings used to be below 40% recommended. Just look at what follows a "No" recommendation and how… Full Review ▶
I am satisfied with the overall service provided by the Congressional Towers. People in the leasing office are nice. They usually response to the request properly. The maintenance staff are very nice and professional. Never lost anything. I have never complained… Full Review ▶
I have very good experience living in this apartment. it is very close to the metro which can same a lot of time to work and back work. also the people living in this community is very friendly. I love it.… Full Review ▶
Very pleasant experience; encountered no problems. Staff is very courteous and friendly. The staff is always very professional and have the time to listen to whatever questions or concerns I have and quick to respond. Full Review ▶
it is a excellent lives in near area. fdfdfdfdfdfdfdfdfdfdfdfd fdfdfdfdfdfdfdfdfdfdfdfdffdfdfdfdf fdfdfdfdfdfdfdfdfdfdfdfdfdfdfdfdfdfd fdfdfdffdd fdfdfdfdfdfdfdfdfdfddd fddddddddddddddddddddddddddddddd fffffffffffffffffffffffffffffffffffffffffffffffffff dfdfdfdfdfdfdfdfdfdfdfdfegmrlepwp,gr;e,gl;;re,qlg;,rle;qgfd Full Review ▶
Great job. thank you. Full Review ▶
My family all like the community very much. Our apartment is very cozy, and the common areas are wonderful. It is close to grocery stores, park, and public transportation. And parking is convenient. Perfect living here. Full Review ▶
Overall my residence experience has been the best with the understanding of personalities and human nature. All ratings refer to my residence over a period of 19 years. I feel I have been objective and honest in this survey from my… Full Review ▶
I am a current tenant living in Building 263. The reason I picked Congressional Towers was because of the high rating here. However, I figured out I was totally fooled after living here for 4 months. This might be the most… Full Review ▶
Its a great experience with every day-to-day needs in vicinity.. The appartments are clean and modernized, location is beautiful and the staff is friendly and promptly act on any incidents. I highly recommend this appartment to any one. Full Review ▶
Nice apartments with good amenities. The gym and pool are both well equipped. The management has made/is making several improvements to the units, including upgrading the elevators and the fire alarm system. Overall, nice place to live. Full Review ▶
I rent the apartment by internet i was still in my country and i did ask at that time to give a unit corner and because of the dates they said there is no unit corner available but you can change… Full Review ▶
Nice apartment and highly recommended. The location is reachable for public transportation. it is close also from the city center, friendly neighborhood and very safe for children access. I am happy to stay in this community Full Review ▶
I was living in the CT in 2006-2008 and now since 2010. There are clearly changes over time as buildings getting older. I appreciate the efforts and professionalism of the CT staff to maintain the community at a good level. I… Full Review ▶
So far I have lived at this community for a little under 3 weeks and I love the location and amenities of the apartment. The neighbors are very friendly and location is great. A few things that bother me is that… Full Review ▶
Sometimes office staffs are not polite. Also sometimes they used to make a decision for maintenance without letting me know although I requested I have a preference on the maintenance day. Online payment system is convenient. Full Review ▶
The experience is great, the staff is taking care of our requests. it is a very kids friendly community, we love that. As I mentioned, we would like to ask you to put back the bumpers on the parking lot for… Full Review ▶
not very great , staff is good till you are in appt Full Review ▶
We really like the place. the neighboors are friendly Full Review ▶
Great community! Great value! Full Review ▶
my last experience was terrible Full Review ▶
no comment Full Review ▶
good Full Review ▶
Nice and quiet Full Review ▶
GOOD Full Review ▶
Overall pleased with the apartment complex and amenities. Full Review ▶
The staff is helpful, the apartment is great. My only complaint is the institution of visitor parking areas that are very inconvenient. I am disabled and need lots of help from family and friends. Some of them are older and have… Full Review ▶
Great location and great gym. Its walking distance to the metro and several stores, restaurants and shops which is very convenient if you don't like to drive everywhere. The gym is very new and rivals a commercial gym. The neighborhood is… Full Review ▶
It's perfect. Full Review ▶
Friendly community, quiet yet just steps away from a variety of food and shopping options. Full Review ▶
very nice apartment sofar and good location indeed. Full Review ▶
The experience was not good. Our kitchen and bathroom flooded four times while living here. The first few times, the maintenance request was not handled properly and we had to wait over 24 hours for maintenance to attend to the issue.… Full Review ▶
here is quite clean, comfort, and safe. Full Review ▶
Its a nice clean community, office stuffs are very friendly. Renee was excellent Full Review ▶
This is a great apartment complex. It is like living in an international Center. People are courteous and we have opportunities to interact with individuals from all over the globe. Full Review ▶
Nice environment, nice apartment, I love the large living room and balcony, and the service is good. A little expensive when rent in September, my rent fee is 1605 for 1 bedroom. Full Review ▶
Apartments are ok and the community pool and gym are a plus. I however have had quite a few pest problems and some other problems that have made living uncomfortable. Full Review ▶
Good Full Review ▶
Apartment was fine except for some noisy children who would run through the halls. Grass cutting started at 6:30am during the summer which was annoying if you had your window open. My big problem with this complex is their move out… Full Review ▶
It was a great experience. Pool is great, quiet building, very safe and comfortable. Full Review ▶
This places service and staff are horrible. The biggest issue is cooling and heating since they use water based cooling temperature difference between outside and inside is only 5 degrees. I would suggest you check heating and cooling thoroughly before moving… Full Review ▶
The apartment management is courteous and professional in their work. While this is good in one sense, it can also be a problem if you want are seeking for favors from the management regarding short term lease or rent. Noise :… Full Review ▶
I love Congressional Towers. I feel my hometown in here. Full Review ▶
The apartment is bright and comfortable. The closets are roomy. While it does not have "luxury" features, the facilities are more than adequate. The rec center and pool are a wonderful addition. The location is excellent with stores and public transportation… Full Review ▶
Overall good. Sometimes the gym is attended by people i think do not belong to the community and they do not were outfit but regular clothes. Need more signs requesting to clean after use equipment. At the pool last year there… Full Review ▶
I just moved in two weeks ago, but I really enjoy staying here. The community is safe and friendly, the buildings and surrounding are kept always very clean and the staff is very friendly and helpful. Full Review ▶
So far so good Full Review ▶
overall I like this apartment and its environment except the price and mice problem Full Review ▶
Overall, I am satisfied with the apartment except for its parking policy. It was just released this year, but making our life really inconvenient. You have to spend around 5 min to find a place to park when you get back… Full Review ▶
N/A Full Review ▶
room was excellent, fresh Full Review ▶
Too early to comment Full Review ▶
Close to shopping center and supermarket. Quiet. Safe. Well kept grounds. Great swimming pool and clubhouse. I have lived here for over 20 years. That should be testimony in itself. The rent is very reasonable compared to other apartments. Full Review ▶
The apartment is a bit expensive but overall good value. It is close to a grocery store, utilities are included, there is a bus stop on the street, and the metro is just a 15 minute walk away. Full Review ▶
Decent but boring apartment community. Demographic is almost entirely ------- and they are generally quiet and boring. Full Review ▶
Congressional Towers is a great complex to live in! Our apartment was renovated with new carpet, appliances, paint, and counter tops right before we moved in, so it felt like we were moving into a brand new apartment. It is beautiful!… Full Review ▶
Mice, mice, mice. The apartment has a lot of mice. Mice visited our room every day. The office is late to take an action. Full Review ▶
Very satisfy! Full Review ▶
So far, so good. It is clean, people are friendly, grounds well-maintained, sufficient parking, secure, etc. Full Review ▶
That's great. Full Review ▶
The rent increases too much. I had a bad experience on the cold water been shut-off for four days due to water piping project. They promised to restore before COB of Fri. but they do not. No one came to fix… Full Review ▶
good Full Review ▶
I feel that it is very safe community and I like the fitness center a lot. Full Review ▶
Nice and good community living.Great location and beautiful landscape.Great gym and swimming pool facility Full Review ▶
The recently renewed pool in the summer and the gym, make this still a great place...It doesn't completely make up for how old the buildings are, and tje old systems in place. But in the spring and summer, this still feels… Full Review ▶
The community is very nice and everyone is very friendly. Full Review ▶
Good maintenance staff but a little bit loud neighbors. Full Review ▶
Excellent place to live with very friendly locality and staffs. Full Review ▶
good community Full Review ▶
Excellent Full Review ▶
it has been very nice Full Review ▶
It has so far been positive. Nice neighborhood, friendly people and responsive management. Full Review ▶
The community is fine. The distance to the Metro is not ideal:about 6 blocks and most of it going uphill. There is bus service that you can take to the Metro, but the bus stop lacks shelter. When it is raining,… Full Review ▶
Excellent location! Everything you need is in walking distance. It's quiet and pleasant. Tenants are polite. Maintenance is courteous and prompt. Overall, a very nice place to live! Full Review ▶
I have been here since last August. This a nice and quite community. It is really a plus that all utilities are included. A little bit far away from the nearest metro station, but shopping centers are in walking distance. Full Review ▶
Only here since a month, for now the experience is really positive. Full Review ▶
Been living here for 2 years now (since apr 2011), and about to renew our lease. Quite and very safe neighborhood, predominantly asian residents (mostly -------/koreans/chinese-50%), but diverse as well with different nationalities (about 30% are white, the rest are europeans/israelis).… Full Review ▶
My family have lived here for 5 months. We like this place: convenient location, clean and well-maintained apartment, helpful and professional leasing office staff, good school district and much more. For unexpected job changing reason, we have to leave before expiration… Full Review ▶
Apartment is convenient to most retail along Rockville Pike and that is a plus. However, my apartment has a persistent foul odor that comes out of the vents in the bathroom and the master bedroom. I have asked management to look… Full Review ▶
Strengths: Cost (esp. for those working at NIH), which includes all utilities and appliances; heating and air conditioning; parking; convenient location; fairly clean; easy to dispose of waste; safe. Weaknesses: Thin walls (one can easily hear neighbors); laundry room issues (machines… Full Review ▶
Great sized, beautiful apts., but the walls/ceilings are paper thin. I can hear my upstair neighbors using the toilet...gross! The apt. doors are heavy and slam, waking me up early every single morning. If it wasn't for the terrible sound proofing,… Full Review ▶
When I was looking for an apartment in the Rockville/Bethesda in 2010 I checked the reviews on apartmentratings.com and saw that Congressional Towers was very poorly rated; however, the price was right (~$1,500 per month including utilities for a 1 bedroom)… Full Review ▶
Rockville has got unbelievably pricey in just the last couple months rent across the board from White Flint to Twinbrook have increased by $300 a month. This place really is a hidden gem. Giselle and Antonio at the leasing office are… Full Review ▶
Most of these reviews are from irresponible renters, I've lived here for 8 years. Mgt has made many improvements to the community in that time, adding a new pool center and fitness room. They are always sen ding notices about new… Full Review ▶
Incompetent staff. The office staff, besides being rude, don't really understand the operations of this apartment complex. If you move in, check everything,including lights, fixtures, cabinetry, fuses, etc. They won't do it. Don't expect staff to get back to you with… Full Review ▶
When I moved in, I was surprised that they could call this apartment ready for leasing. The carpet was dirty and worn, kitchen counter top was old and broken. When I was pulling a drawer open, it fell off. Cabinet doors… Full Review ▶
Hi , I have been living in the apartments for 1 year now. When I moved in .. they show me the best picture .. some how the carpet was OLD .. Counter Tops were not new .. And when I… Full Review ▶
I purposely waited for some time after I moved out so I can write a more or less objective review, so here goes. First, location. As you already know, this is pretty close to shops and a 15 minute walk to… Full Review ▶
Right now, something is going on above my apartment. It sounds like someone is drilling holes in the wall. I work at night and it would be so nice if the management would notify us of such annoyances. About an hour… Full Review ▶
People At The Office Are Not Pros And Some Are just annoying arnt fast. But The Maintenance people are the best. one time i needed something fixed tootie was there and less then 12 hours he was there .And about a… Full Review ▶
I AM ABOUT TO MOVE IN THE APT. NOW COULD ANYONE PLEASE TELL ME IF IT IS A GOOD IDEA . I AM MOVING OUT OF THE APT. THAT I AM STAYING NOW BECAUSE OF THE MICE, I'M SO TIRED OF… Full Review ▶
I am a fairly new resident and I am really enjoying my home. It was a nice experience with office staff moving in. I enjoyed meeting property manager, Shonda Elam and her staff. Grounds are well kept and homes are very… Full Review ▶
It is nice to live there but you will get trouble when you are going to leave. 1. They will increase the rate a lot when you change yearly lease to month by month ( $200, even after you have lived… Full Review ▶
I have lived here for a long time. Just had a problem with the heating and we got instant response and very courteous and fast service. I have always had a fast and more than polite experience with both the maintenance… Full Review ▶
If you want great apartments and the best in customer service, I suggest Congressional Towers. Management staff is quick to assist you with your need. It has the best maintenance staff, they respond within a 24 hour period. This apartment building… Full Review ▶
I moved into Congressional Towers shortly after I graduated college. The grounds are beautifully maintained and the rec center is definitely a plus...I save a lot of money by using their gym which is much cheaper, cleaner and nicer than the… Full Review ▶
We moved here in January 2011. It has been a very pleasant experience. The neighbors are quiet, and the management staff (especially Mrs. Joyce) has always been very friendly and helpful whenever I needed any assistance. I would definitely recommend this… Full Review ▶
Very spacious 2bedrooms and balcony.Management is wonderful responds to my needs quickly.On site gym here so get your work out in. Lived here 4 yrs no roaches or rat here.Convenience is a must metro station and grocery store close by!!!! Full Review ▶
I wanted to offer my review of this apartment complex because I am so much happier here than I was at my last apartment. This place is one of the best complexes that I have lived in. One of the main… Full Review ▶
I've lived here for years and I honestly don't understand some of these comments. The staff is always available, answers my questions, and resolves issues quickly. I shopped around before choosing Congressional Towers and am happy with my decision. I've recommended… Full Review ▶
The staff is very rude and unprofessional. It seems like they never have any answer for anything and they always come up with some excuse not to deal with the problem in hand. Full Review ▶
This is my first time seeing this website and I'm kind of surprised by the reviews this place got. I honestly haven't had an issue living here at Congressional Towers for the past two years while working on my masters degree.… Full Review ▶
It's so fun. Some guy said that didn't see bug and mice in this APT. It is so confusing for me. Me and My friend saw mice in my kitchen and there kitchen. When I asked about mice to office, I… Full Review ▶
We moved to here recently, but have already seen mice 3 times in our apartment. Maintenance came 3 times and found some holes, they closed them, but the mice keep coming from I don't know where. We are definitevely leaving. Full Review ▶
Nothing to say about this place. Full Review ▶
I have lived at Congressional Towers for going on two years now and have had a problem with mice and roaches since almost as soon as we moved in. We live on the ground floor and are next to the trash… Full Review ▶
I recently moved out of Congressional Towers at the end of September 2010 after living there for one year. Pros: All utilities are included; the buildings are older so the walls are very thick, meaning minimal noise from neighbors next to… Full Review ▶
I've been living in congressional Towers for 3 years, the apartment is close to everything, just 3 blocks away from metro and few minutes away from all major shopping, the location is unbeatable. For the apartment itself, it's well constructed, elevator,… Full Review ▶
Many rodents are there now. Even though I heard manager treated it, many residents see mice in the kitchen. Be careful. Full Review ▶
Living here from July 2009. This place is just great. I would always recommend it. Pros: - Safe and beautiful neighborhood with lots of great parks. - Large apartments with balconies, very clean.. - Parking - Thick walls, no noise at… Full Review ▶
I'm currently writing this review while sitting in my apartment. The thermometer next to me reads 87 degrees... It's around 1 p.m., so I can reliably expect the temperature to reach 90 in a couple of hours. We are supposed to… Full Review ▶
I lived in a 2 br with a roommate for a year. While Congressional Towers, like any other apartment complex, is not perfect, we had an overall positive experience. The staff in the leasing office were generally courteous, friendly, and helpful… Full Review ▶
Talked to a guy in my building who said he was leaving as soon as his lease was up b/c he had mice coming through holes behind the stove and washer and dryer. Low and behold I saw a mouse in… Full Review ▶
The staff told something then the manager told me she made the desicion, do not care about her staff saying. They enter you apaartment to check without notice in advance. The utility not working often and take long time to fix.… Full Review ▶
Poor management, I hate the leasing office. No fan in the bathroom. Full Review ▶
The complex pretends to be a luxury one, with building keys and gym and swimming pools. It has internal and external appearance of a good hotel. The carpets were recently changed in hallways, elevators redecorated, and new bright lightning installed in… Full Review ▶
We have been here for 4 months. People from the leasing office are very nice and efficient. Also, they are organized. Everything is clean and the appartments are great! It is really well localized, and if you have kids... here is… Full Review ▶
I lived in Congressional Towers for over a year. I am very satisfied with this community. PROS: 1. Walls are thick enough to let you live in a quiet apartment. 2. Parking is ample, no problems with finding a spot. 3.… Full Review ▶
The management is rude and they do not like to help with problems you might experience with the apartment. The rent is way to high for what you get. There is a big problem with roaches.I have been fighting them since… Full Review ▶
This is by far the best place I have ever lived! Maintenance is quick to respond to all issues, and the staff are pleasant. My fiance and I live facing the country club, and the view is amazing - we see… Full Review ▶
The apartments are very old. Water quality is terrible. You will destroy your health. Someone living in congressional towers may recommend you, because they want to get a discount using your moving in. Do not get in. Full Review ▶
We really enjoyed living at Congressional. They were very responsive to any problems we had and Shawna (management) was TREMENDOUS! Our apartment was really nice and had a beautiful view of the country club across the way. Full Review ▶
They don't allow a husband, wife and baby in a 1 bedroom apartment they charge $1400 a month for. They require you to give 60 day notice instead of 30 after the leasing contract expires( many people cannot secure and hold… Full Review ▶
I love living here! This is my third year at Congressional Towers, and I'm still liking it. It's a great deal for the area - paid utilities and competitive rent rates. Clean and quiet. Our builiding maintenance is great - I… Full Review ▶
the building is very old, although they have done some renovation. Sometimes, the water becomes yellowish and little bugs found in the kitchen area. The leasing office is ok, but they chanrged me a lot of money for some spots on… Full Review ▶
The air is polluted in that apartment complex. Everything I hanged in the bathroom got bleached even though I don't use bleach both new and used items became white over a period of time, They don't know what causes the bleaching.… Full Review ▶
My husband and I have been living in Congressional Towers since 2004. We live in one of the newer apartments. We have a one bedroom and live on the first floor (one floor above the terrrace level). The apartment is cost… Full Review ▶
Please bear in mind that you can not get your deposit back for sure. We actually hired people to clean the apartment before we leave since my husband 's company offered enought money for moving . and at that time we… Full Review ▶
terrible management! They are nice when you go for a tour, but become nasty when you move out. They charge you unreasonable money for replacing everything in the apartment. It's an old building and many things need to be replaced after… Full Review ▶
Although the building is older and not inviting, my apartment inside had been newly renovated when I moved in, with new appliances, neutral carpet, and white paint. The rental, which includes all utilities, except phone and cable, is an excellent value.… Full Review ▶
I've lived in my apartment for 11 years. I have not seen any bugs (except outside). I wonder about all the bug reports. Are these people living on the ground floor???
Anyway, I will agree with the cooking smells in the hall.… Full Review ▶
They would try everything in their power to charge you for ridiculous stuff when you move out. Very unpleasant to deal with. Impossible to communicate with. I would NOT recommend anybody to move into this place. Full Review ▶
Management sucks... Big time crooks, don't let them fool you!!!! Full Review ▶
While all of these reviews are accurate, let me divulge. Yes, there is a bug problem (roachs, MAINLY) but can be corrected with a call to maintenece and supplying your own traps (they do go away!). Yes, it does smell of… Full Review ▶
This comment is two-folded. Firstly, I would like to say how bad the roach and silverfish problem is here. It's true that management does deal with the roach issue (if you call), but I think their methods are futile because the… Full Review ▶
Ok, I have seen alot of negative reviews about Congressional Towers on this site and I thought I would lend my view after having lived there for about 2 years.
There are definitely some issues with this place. There are some… Full Review ▶
I've lived at the apartment before (7th floor), and I never seemed to have any bug problems. At the current time, I'm debating about moving back. To the people with bug/roach problems, what floors did you live on? Is it consistently… Full Review ▶
FIRST OF ALL, I HAD TO LIVE BECAUSE OF THE BUGS. THEN I RECEIVED AN OUTSANDING BILL AFTER I MOVED OUT. THESE APARTMENT ARE NOT WORTH A PENNY. DON'T LET THEM FOOL YOU Full Review ▶
there will be a big bill waitting for you when you check out, they want to refurbish everthing and you have to pay for it. they treated everthing such as rug, wall as broken, for that reason, you have to pay… Full Review ▶
Do not rent here, unless you want to live in a place that smells bad and you love bugs. Full Review ▶
DO NOT RENT HERE!!! IT STINKS. HORRIBLE COOKING SMELLS COMING OUT OF THE VENTS . ALL SORTS OF BUGS Full Review ▶
When they showed us the terrace level apartment, they took us through a side entrance under the pretext that it would save time. In fact, after we moved in and used the real entrance we realized the true reason: the unit… Full Review ▶
Just wanted to know which building the person who posted the bed bug issue lived in. We're already having a hard time dealing with the roaches, so we hope the bed bugs are not in our building. Full Review ▶
reviews not accurate/great apartments/great management Full Review ▶
I have lived here for a few years and the bug problem has really gotten bad in the past year or so. I keep a bottle of raid handy at all times. Silverfish, roaches, etc. You name it, we have seen… Full Review ▶
It stinks!!! horrible smells and all sorts of bugs!!!! run, don't rent here!!!! Full Review ▶
great place to live no bed bugs or roaches Full Review ▶
This place is infested with bedbugs. Yes bedbugs, this my first time seeing them in my life. I am ready to get out!!!!!!! Full Review ▶
I have been here for 3 years. The biggest problem here is noise noise noise!! Kids are always running and shouting in the hallway and most parents do not scold them. And wall is really thin. I always hear kids jumping… Full Review ▶
Ever since we moved in, we've seen a huge number of cockroaches that don't go away. I think the problem with Congressional Towers is that they deal with the situation on a case by case basis when in fact it should… Full Review ▶
This place looks nice, but is infested. From the kitchen to the bathroom to the bedroom, there is not one place where you cannot find these critters. Run. Full Review ▶
I hate this place. Management sucks. They pretend to be nice, but they are not professional. Full Review ▶
The rent is great and all utilities. I have notice no shift in mgmt since I moved in September. They get problems taken care of quickly. I keep in touch with the property manager and have never had any problems. The… Full Review ▶
I have lived in this appartment and enjoyed my time here. The Office staff was always friendly and the maintenance people were prompt and cordial.
This place is safe, close to many shopping places and is clean.
I received a good NIH employee… Full Review ▶
Apartment looks good. They almost complete renovation thorough this 2 years. Rental fee is less expensive.
Office is very bad. They change their members frequently. Eventhough my phto ID was passed to unkown people by them. Full Review ▶
The building is adequate. Fixtures in kitchen and bathroom are all new. New carpeting and blinds. Climate control works fine. Leasing office and management are extremely incompetent. Expect a long ------ process with plenty of surprises, but if you're patient, then… Full Review ▶
Property Description
Congressional Towers Apartments in Rockville, MD, has one of the finest locations in the Rockville area, situated between Rockville Pike, The Capital Beltway, and I-270 and only three blocks from Twinbrook Metro. Congressional Towers has spacious one and two-bedroom apartment homes with all utilities included and free membership to Rollins Congressional Club and its a resort-style water park, world-class gym, and banquet facility. There is no finer combination that fits your needs and desires! Visit Website
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text:
There are approximately one hundred major radioactive nuclides which can be found in a reactor system (see Appendix A, Table A-1). Each nuclide decays with emission from the nucleus of characteristic energetic elementary particles or energetic photons. In some cases, the change is accomplished by the capture by the nucleus of an extra-nuclear electron.
The various decay processes and the particles and radiations emitted are:
Decay Process
Radiation Emitted
Mass (amu)
Electrical Charge
Typical Energy (MeV)
Alpha Emission
Alpha particle (α)
Beta Emission
Beta particle (ß−)
Positron Emission
Positron (ß+)
Two gamma-rays (γ)
Electron Capture
Characteristic x-ray
Internal Transition
Gamma-ray (γ)
Internal Conversion
Converted electron (e−)
Characteristic x-ray
Neutron Emission
Neutron (n)
Spontaneous Fission (e.g., Cf-252)
Fission products and other radiations
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Radiochemistry in Nuclear Power Reactors 2. RADIOACTIVITY PRODUCTIONS IN NUCLEAR REACTORS 2.1 RADIOACTIVE SPECIES IN LIGHT WATER REACTORS There are approximately one hundred major radioactive nuclides which can be found in a reactor system (see Appendix A, Table A-1). Each nuclide decays with emission from the nucleus of characteristic energetic elementary particles or energetic photons. In some cases, the change is accomplished by the capture by the nucleus of an extra-nuclear electron. The various decay processes and the particles and radiations emitted are: Decay Process Radiation Emitted Mass (amu) Electrical Charge Typical Energy (MeV) Alpha Emission Alpha particle (α) 4 +2 4–9 Beta Emission Beta particle (ß−) 0.0005 −1 0–3 Positron Emission Positron (ß+) 0.0005 +1 0–3 Two gamma-rays (γ) 0 0 0.51 Electron Capture Characteristic x-ray 0 0 0–0.1 Internal Transition Gamma-ray (γ) 0 0 0.1–3 Internal Conversion Converted electron (e−) 0.0005 −1 0.1–1 Characteristic x-ray 0 0 0.0–1 Neutron Emission Neutron (n) 1 0 0–14 Spontaneous Fission (e.g., Cf-252) Fission products and other radiations — — ≈200
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Radiochemistry in Nuclear Power Reactors The decay of a radioactive species is a random process dependent only on the number of radioactive atoms present at a given time (i.e., the decay rate is a first-order reaction): (2–1) Upon integration, the result can be written as (2–2) where N=number of atoms present at time t; No=number of atoms present at t=0; λ=decay constant. The constant λ is the characteristic decay constant for the radioactive species. The characteristic rate of radioactive decay may conveniently be stated in terms of the half-life (t1/2), which is the time required for an initial number of atoms to be reduced to half that number by decay. A sample of any radioactive substance which is decaying at the rate of 3.7×1010 disintegration per second is traditionally said to contain one curie (Ci) of radioactivity. A millicurie (mCi) is 10−3 curies and a microcurie (μCi) is 10−6 curies. The microcurie is probably the most frequently used activity unit in the nuclear industry. The SI unit for the activity is Becquerel (Bq). One Bq is equal to one disintegration per second of activity, thus one Ci equals 3.7×1010 Bq.
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Radiochemistry in Nuclear Power Reactors The concentrations of radioactive species in different types of samples may be expressed in different ways. For example: Sample Form Recommended Expression Recommended Unit Liquid Concentration μCi/L or Bq/mL Reactor water or condensed steam Concentration μCi/kg or Bq/gm Gas Concentration μCi/cc or Bq/cc Solid Solid concentration μCi/gm or Bq/gm of specified solid substance Surface Surface concentration µCi/cm2 or Bq/cm2 Any form of target substance Specific activity μCi/gm or Bq/gm of target element It should be noted that the activity concentration in reactor water or condensed steam is commonly reported in μCi/kg or Bq/gm. Using the mass instead of volume avoids the confusion of water density differences at different temperatures. The radioactive species may be produced in a reactor by different nuclear reactions from various target materials in the system. 2.2 NUCLEAR FISSION The fission process is usually accompanied by the emission of neutrons and much more rarely by the emission of a particles and possibly other light fragments. Tritium is also emitted in some fission processes. Fission has been produced in some nuclides (notably U-235, U-238, and Th-232) by neutrons, protons, deuterons, helium ions, and γ and x-rays of moderate energies. In a reactor by far the most important of these reactions is neutron-produced fission. The species U-232, U-233, U-235, Pu-239, Am-241, and Am-242 undergo fission either with thermal or fast neutrons, whereas fission of U-238 requires fast neutrons.
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Radiochemistry in Nuclear Power Reactors 2.2.1 Mass Distribution and Fission Product Chains The fission process may occur in many different modes, and a very large number of fission products, ranging from Z=30 (zinc) to Z=65 (terbium) and from A=72 to A=161 in the thermal neutron fission of U-235, are known. Fission into two equal fragments is by no means the most probable mode in thermal-neutron fission. Asymmetric modes are much more favored, the maximum fission product yields occurring at A=95 and A=138. The asymmetry appears to become less pronounced with increasing bombarding energy. When the total fission yield at each mass number is plotted against mass number, the curve shown in Figure 2–1 results. The curve is essentially symmetrical about the minimum at A=233.5/2 and has two rather broad maxima around mass numbers 95 and 138. The yields in each of the two peaks sum to approximately 100%. Sufficient information is available on the fission yields in the thermal-neutron fission of Pu-239 to draw a mass-yield curve for this case. The general shape is similar to the U-235 curve, but there are certain significant differences (see Figure 2–1). The yield at the minimum is not as low as for U-235; it is about 0.04 percent of the fission yield at A=119. The heavy peak appears not to be appreciably displaced, compared to U-235 fission, but the light peak has its maximum at about A=99. An enormous amount of radiochemical work was required to arrive at the present state of knowledge about fission products. It was necessary to develop chemical separation procedures, to analyze radioactive decay and growth patterns, to determine beta- and gamma-ray energies, to establish mass assignments of many previously unknown nuclides and to measure the fission yields. The fission yield of a nuclide is the fraction or the percentage of the total number, of fissions which lead directly or indirectly to that nuclide. As would be expected from the different neutron-proton ratios for U-235 and the stable elements in the fission product region, the primary products of fission are generally on the neutron-excess side of stability. Each such product decays by successive ß− processes to a stable isobar. Chains with as many as six β− decays have been established, and undoubtedly some fission products still further removed from stability (higher on the parabolic slope of the stability valley) have escaped detection because of their very short half-lives. No neutron-deficient nuclides have been found among the products of thermal-neutron fission.
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Radiochemistry in Nuclear Power Reactors Figure 2–1. Yields of Fission Product Chains as a Function of Mass Number for the Thermal-Neutron Fission of U-235 and Pu-239
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Radiochemistry in Nuclear Power Reactors 2.2.2 Charge Distribution Direct information on the distribution of yields along any given chain is confined to the relatively few good measurements of independent fission yields of individual chain members and of the shielded nuclides. An hypothesis which appears to account fairly well for most of the data is the postulate of "equal charge displacement." To state this, we make use of the quantity ZA, the value of Z corresponding to the highest binding energy for a given A. Furthermore, we define Zp as the most probable charge for a primary fission fragment of mass number A. The postulate of equal charge displacement is that the two complementary fragments in a given fission event always have equal ZA−Zp values and, furthermore, that the probability distribution around Zp is the same for all values of A. Remembering that on the average 2.5 neutrons are emitted per U-235 fission, we can write ZA−Zp=Z233.5-A−(92−Zp), or Zp=46+1/2 (ZA−Z233.5-A). From this formula and ZA, Zp can be calculated for any A. The measured independent yields indicate a probability distribution such that 50% of the total chain yield occurs for Z=Zp, about 25% each for Z=Zp±1, about 2% for Z=Zp±2, and much less for other Z values. The isobaric yield distribution around Zp appears to be Gaussian, and the postulate of a universal distribution in Z at all values of A is borne out by experiment, but not understood theoretically. As an example, the charge dispersion among products with A=93 from thermal-neutron fission of U-235 is shown in Table 2–1 and Figure 2–2. As can be seen in Figure 2–2, the fractional independent yield or relative probability P(Z) of formation of a product with atomic number Z is well-represented by a Gaussian curve,(3) in which P(Z) is the fractional independent yield of the fission product with atomic number Z, fo.e. is the odd-even effect factor, and C is nearly constant for all fission product mass chains. The fractional cumulative yield of a fission product with charge Z is given by:(4)
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Radiochemistry in Nuclear Power Reactors Table 2–1 BETA DECAY CHAIN FOR MASS NUMBER 93 (Yields are for thermal-neutron fission of U-235) Nuclide Fractional Independent Yield Cumulative Yield % Br-93 (0.81s) 4.9×10–4 0.003 Kr-93 (1.3s) 0.075 0.49 Rb-93 (5.8s) 0.48 3.54 Sr-93 (7.5m) 0.39 6.21 Y-93 (10.2h) 0.19 6.37 Zr-93 (9.5×105y) 2×10–4 6.37 Nb-93 (Stable) 27×10−9 6.37 Figure 2–2. Charge Dispersion for Products with A=93 from Thermal-Neutron Fission of U-235
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Radiochemistry in Nuclear Power Reactors The value of C is related to the Gaussian curve width parameter (σ) which is nearly constant (σ=0.56) for all masses.*(5) Zp for each mass chain has been empirically determined based on many values of Zp found experimentally. Based on the charge distribution probability, Rider(6) has calculated by both the independent and cumulative fission yields for all fission products from various fission reactions. A summary of major fission product yields in thermal-neutron fission of U-235 and Pu-239 is given in Table 2–2. 2.3 TRANSURANIC NUCLIDES The transuranic elements are those produced by successive neutron capture of uranium and its products in a reactor. The chain of production and the radiation characteristic of each isotope are shown in Figure 2–3. In this production chain, the major products are: Neptunium −237, −239; Plutonium −238, −239, −240, −241, −242; Americium −241, 243; Curium −242; −244. Except for Np-239 and Pu-241, all the isotopes above are alpha emitters. Np-239 is a beta emitter and decays to Pu-239 with 2.36-day half-life. Pu-241 is also a beta emitter and decays to Am-241 with a 14.4-year half-life. A small fraction (0.0023%) of Pu-241 also decays to U-237 by emitting alpha particles. Experimental measurements, as well as theoretical calculations of each transuranic isotope buildup in the fuel element as a function of fuel burnup, have been reported by several investigators(8,9,10) for various fuel materials. Variations of transuranic isotope content with fuel burnup relative to total uranium are shown in Figure 2–4 for 2.5% enriched UO2 fuel. The transuranic activity buildup varies quite rapidly with the fuel burnup; however, the predominant alpha activity at the end of irradiation is Cm-242 (90 to 95%) because of its shorter half-life. As the fuel exposure increases, the fissionable nuclides (Pu-239 and Pu-241) are created in the fuel, and a large fraction of fission may be attributed to plutonium isotopes near the end of fuel life (Figure 2–5). * C≈(σ2+1/12)
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Radiochemistry in Nuclear Power Reactors Table 2–2 CUMULATIVE YIELDS OF MAJOR FISSION PRODUCTS IN THERMAL NEUTRON FISSION OF U-235 AND Pu-239 Nuclide Half-life Decay constant λ, l/s Fission yields(Y), % Y*λ U-235 Pu-239 U-235 (U+Pu)/2 Br-84 31.80 m 3.63E-04 0.967 0.444 0.706 3.51E-06 2.56E-06 Kr-85m 4.48 h 4.30E-05 1.300 0.565 0.933 5.59E-07 4.01E-07 Kr-85 10.72 y 2.05E-09 0.285 0.128 0.207 5.86E-12 4.24E-12 Kr-87 1.37 h 1.41E-04 2.520 0.990 1.755 3.54E-06 2.47E-06 Kr-88 2.84 h 6.78E-05 3.550 1.320 2.435 2.41E-06 1.65E-06 Kr-89 3.15 m 3.67E-03 4.600 1.440 3.020 1.69E-04 1.11E-04 Kr-90 32.30 s 2.15E-02 4.860 1.400 3.130 1.04E-03 6.72E-04 Rb-88 17.70 m 6.53E-04 3.570 1.360 2.465 2.33E-05 1.61E-05 Rb-89 15.40 m 7.50E-04 4.770 1.680 3.225 3.58E-05 2.42E-05 Rb-90 2.60 m 4.44E-03 4.500 1.390 2.945 2.00E-04 1.31E-04 Rb-90m 4.30 m 2.69E-03 1.240 0.680 0.960 3.33E-05 2.58E-05 Rb-91 58.00 s 1.19E-02 5.670 2.160 3.915 6.77E-04 4.67E-04 Sr-89 50.50 d 1.59E-07 4.780 1.690 3.235 7.59E-09 5.14E-09 Sr-90 29.10 y 7.55E-10 5.910 2.110 4.010 4.46E-11 3.03E-11 Sr-91 9.51 h 1.93E-04 5.930 2.490 4.210 1.14E-05 8.11E-06 Sr-92 2.71 h 7.10E-05 5.910 3.040 4.475 4.20E-06 3.18E-06 Sr-93 7.40 m 1.56E-03 6.370 3.920 5.145 9.94E-05 8.03E-05 Y-90 2.67 d 3.00E-06 5.920 2.110 4.015 1.78E-07 1.21E-07 Y-91 58.50 d 1.37E-07 5.930 2.490 4.210 8.13E-09 5.77E-09 Y-92 3.54 h 5.44E-05 5.980 3.060 4.520 3.25E-06 2.46E-06 Y-93 10.20 h 1.89E-05 6.370 3.920 5.145 1.20E-06 9.71E-07 Zr-95 64.00 d 1.25E-07 6.490 4.890 5.690 8.14E-09 7.13E-09 Zr-97 16.80 h 1.15E-05 5.930 5.320 5.625 6.80E-07 6.45E-07 Nb-95 34.97 d 2.29E-07 6.490 4.890 5.690 1.49E-08 1.31E-08 Nb-97 1.23 h 1.57E-04 5.950 5.370 5.660 9.31E-06 8.86E-06 Mo-99 2.79 d 2.88E-06 6.120 6.160 6.140 1.76E-07 1.77E-07 Mo-101 14.60 m 7.91E-04 5.180 5.940 5.560 4.10E-05 4.40E-05 Tc-98m 6.02 h 3.20E-05 5.380 5.420 5.400 1.72E-06 1.73E-06 Tc-101 14.20 m 8.14E-04 5.180 5.950 5.565 4.21E-05 4.53E-05 Tc-104 18.00 m 6.42E-04 1.920 5.960 3.940 1.23E-05 2.53E-05 Ru-103 39.27 d 2.04E-07 3.040 6.950 4.995 6.21E-09 1.02E-08 Ru-105 4.44 h 4.34E-05 0.972 5.360 3.166 4.22E-07 1.37E-06 Ru-106 1.02 y 2.15E-08 0.403 4.280 2.342 8.68E-11 5.05E-10 Rh-105 35.40 h 5.44E-06 0.972 5.360 3.166 5.29E-08 1.72E-07 Sb-125 2.76 y 7.96E-09 0.029 0.115 0.072 2.31E-12 5.73E-12 Te-129m 33.60 d 2.39E-07 0.127 0.270 0.199 3.03E-10 4.74E-10 Te-132 3.26 d 2.46E-06 4.280 5.230 4.755 1.05E-07 1.17E-07 I-131 8.04 d 9.98E-07 2.880 3.850 3.365 2.87E-08 3.36E-08 I-132 2.28 h 8.44E-05 4.320 5.390 4.855 3.65E-06 4.10E-06 I-133 20.80 h 9.26E-06 6.690 6.930 6.810 6.19E-07 6.30E-07 I-134 52.60 m 2.20E-04 7.710 7.270 7.490 1.69E-05 1.65E-05 I-135 6.57 h 2.93E-05 6.300 6.450 6.375 1.85E-06 1.87E-06 I-136 1.39 m 8.31E-03 2.970 1.740 2.355 2.47E-04 1.96E-04
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Radiochemistry in Nuclear Power Reactors Nuclide Half-life Decay constant λ, l/s Fission yields(Y), % Y*λ U-235 Pu-239 U-235 (U+Pu)/2 Xe-133 5.24 d 1.53E-06 6.700 6.980 6.840 1.03E-07 1.05E-07 Xe-133m 2.23 d 3.60E-06 0.189 0.232 0.211 6.80E-09 7.57E-09 Xe-135m 15.30 m 7.55E-04 1.000 1.680 1.340 7.55E-06 1.01E-05 Xe-135 9.10 h 2.12E-05 6.540 7.600 7.070 1.38E-06 1.50E-06 Xe-137 3.82 m 3.02E-03 6.060 6.040 6.050 1.83E-04 1.83E-04 Xe-138 14.20 m 8.14E-04 6.420 5.120 5.770 5.22E-05 4.69E-05 Xe-139 39.70 s 1.75E-02 5.040 3.050 4.045 8.80E-04 7.06E-04 Xe-140 13.70 s 5.06E-02 3.620 1.600 2.610 1.83E-03 1.32E-03 Cs-137 30.17 y 7.29E-10 6.220 6.690 6.455 4.53E-11 4.70E-11 Cs-138 32.20 m 3.59E-04 6.640 5.910 6.275 2.38E-05 2.25E-05 Cs-139 9.30 m 1.24E-03 6.280 5.350 5.815 7.80E-05 7.22E-05 Ba-139 83.70 m 1.38E-04 6.350 5.600 5.975 8.76E-06 8.25E-06 Ba-140 12.75 d 6.29E-07 6.270 5.540 5.905 3.95E-08 3.72E-08 Ba-141 18.30 m 6.31E-04 5.790 5.230 5.510 3.66E-05 3.48E-05 Ba-142 10.70 m 1.08E-03 5.730 4.600 5.165 6.19E-05 5.58E-05 La-140 40.27 h 4.78E-06 6.280 5.550 5.915 3.00E-07 2.83E-07 La-141 3.90 h 4.94E-05 5.810 5.310 5.560 2.87E-06 2.74E-06 La-142 92.50 m 1.25E-04 5.830 4.910 5.370 7.28E-06 6.71E-06 Ce-141 32.50 d 2.47E-07 5.800 5.260 5.530 1.43E-08 1.37E-08 Ce-143 33.00 h 5.83E-06 5.940 4.430 5.185 3.47E-07 3.03E-07 Ce-144 284.60 d 2.82E-08 5.470 3.740 4.605 1.54E-09 1.30E-09 Nd-147 10.99 d 7.30E-07 2.250 2.040 2.145 1.64E-08 1.57E-08 Np-239 2.35 d 3.41E-06 60.000 60.000 60.000 2.05E-06 2.05E-06
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Radiochemistry in Nuclear Power Reactors Figure 2–3. Actinide Chains in Uranium-Plutonium Fuel (Reproduced with Permission, from Ann. Rev. Nucl. Sci., Ref. 7)
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Radiochemistry in Nuclear Power Reactors Figure 2–4. Variation of Transuranic Isotope Content with Fuel Exposure in UO2 Fuel
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Radiochemistry in Nuclear Power Reactors Figure 2–5. Variation of Fractional Fissions from Fissionable Nuclides in UO2 Fuel (2.5% U-235) with Fuel Exposure
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Radiochemistry in Nuclear Power Reactors 2.4 ACTIVATION OF WATER AND IMPURITIES IN REACTOR COOLANT Water and impurities in water are activated only when the water flows through the core region; the residence time in the flux zone is only a few seconds for each path. The relevant nuclear data for major activation products in the BWR coolant are given in Table 2–3. Among these nuclides, N-16 (t1/2=7.1 s) is probably the most important nuclide because of its high-energy gamma ray (6.1 MeV) where the radiological effect is concerned. The chemistry and transport behavior of N-16 and other semi-volatile species in the BWR primary system will be discussed later (Subsection 5.4). The production rates of radioactive species in water depend on the concentrations of their parent targets in water. The equilibrium concentration of a radioactive nuclide can be estimated as follows: (2–3) where No=number of parent target atoms N=number of activation product atoms n=parent target input rate, atom/s λ=decay constant, s−1 βc=reactor water cleanup time constant, s−1. = P=reactor power and core geometric factor =effective neutron flux for target activation σ=effective activation cross section
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Radiochemistry in Nuclear Power Reactors Table 2–3 MAJOR WATER AND IMPURITY ACTIVATION PRODUCTS IN REACTOR COOLANT Nuclide Half-Life Reaction Natural Isotopic Abundance (%) Average Activation Cross Sectiona 3H 12.3 y 2H(n,α)3H 0.015 0.53 mb(T) 6Li(n,α)3H 7.5 942 b (F) 10B(n,2α)3H — 5.6 mb (F) 10B(n,α)7Li — 3838 b (F) 235U(n,f)3H — 0.01% fy 14C 5730 y 13C(n,γ)14C 1.11 0.9 mb (T)b 14N(n,p)14C 99.63 1.8 b (F)b 17O(n,α)14C 0.038 240 mb (F)b 15C 2.45 s 18O(n,α)15C 0.204 1.5 mb (F) 13N 9.97 m 16O(p,α)13N 99.76 50 mb (P)c 16N 7.13 s 16O(n,p)16N 99.76 19 mb (F) 19O 26.9 s 18O(n,γ)19O 0.204 160 mb (T) 18F 1.83 h 18O(p,n)18F 0.204 300 mb (P) 24Na 14.96 h 23Na(n,γ)24N 100 528 mb (T) 32P 14.28 d 31P(n,γ)32P 100 190 mb (T) 32S(n,p)32P 95 69 mb (F) 38Cl 37.2 m 37Cl(n,γ)38Cl 24.23 430 mb (T) (a) Data for 20°C; T, F, and P in the parentheses indicate thermal and fast neutron and proton reactions, respectively; the activation cross-section data are adopted from References 1 and 2. (b) P.J.Magno, et al, Proc. 13th AEC Air Cleaning Conf., P1047 (1972). (c) M.S.Singh and L.Ruby, Nucl. Tech., 17, 104 (1973).
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Radiochemistry in Nuclear Power Reactors At equilibrium condition during normal operation, (2–4) Thus, by measuring Neq and P can be calculated. For the parent nuclide, (2–5) At equilibrium, (2–6) Thus, the total active impurity at equilibrium condition can be estimated by: (2–7) The core average neutron flux in a light water reactor may be approximately related to the power density of the core. For a BWR with the core power density at 50 W/cm3, the average fluxes for thermal, epithermal and fast neutrons in the core region are estimated at 1.35×1014, 6×1013 and 3.9×1013 n/cm2/s, respectively.
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Radiochemistry in Nuclear Power Reactors 2.5 ACTIVATION OF CORROSION PRODUCTS The metallic impurities are released into the coolant from the struc-tural materials in the feedwater and primary systems as a result of corrosion/erosion. When they are deposited on the fuel surfaces, they become activated by the neutron flux in the core. Some activation products are also produced in the structural materials in the core. The pertinent nuclear data for the major activated corrosion products are given in Table 2–4. The activity (A) produced in the structural material in the core region at time to can be calculated by (2–8) All symbols have the meanings given previously. The calculated specific activities as a function of irradiation time at a constant neutron flux for the major activation products generally found in lightwater reactors are shown in Figure 2–6. The calculation of activity production in the fuel deposit is rather complex; it involves variations in corrosion product deposition rate, neutron flux, release of activities, etc. The details of model calculations are discussed and compared with the experimental data in Section 4.
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Radiochemistry in Nuclear Power Reactors Table 2–4 MAJOR ACTIVATED CORROSION PRODUCTS IN LIGHT WATER REACTORS Nuclide Half-Life Formation Reaction Nature Isotopic Abundance (%) Activation Cross Section (Barns)a Thermal Epithermal Fast 51Cr 27.7 d 50Cr(n,γ)51Cr 4.35 16.0 0.68 54Mn 312.2 d 54Fe(n,p)54Mn 5.8 0.11 56Mn 2.58 h 55Mn(n,γ)56Mn 100 13.3 1.13 55Fe 2.73 y 54Fe(n,γ)55Fe 5.8 2.5 0.1 59Fe 44.51 d 58Fe(n,γ)59Fe 0.3 1.14 0.1 58Co 70.88 d 58Ni(n,p)58Cob 68.3 0.146 60Co 5.27 y 59Co(n,γ)60Co 100 37.5 6.05 63Ni 100 y 62Ni(n,γ)63Ni 3.6 14.6 0.77 65Ni 2.52 h 64Ni(n,γ)65Ni 0.9 1.50 0.07 64Cu 12.7 h 63Cu(n,γ)64Cu 69.2 4.4 0.40 65Zn 243.8 d 64Zn(n,γ)65Zn 48.6 0.82 0.13 76As 26.3 h 75As(n,γ)76As 100 4.4 5.08 95Zr 64.02 d 94Zr(n,γ)95Zr 17.4 0.075 0.031 110mAg 249.8 d 109Ag(n,γ)110mAg 48.17 4.7 113Sn 115.1 d 112Sn(n,γ)113Sn 1.01 0.71 2.2 124Sb 60.2 d 123Sb(n,γ)124Sb 42.7 4.0 9.7 181Hf 42.4 d 180Hf(n,γ)181Hf 35.2 12.6 2.26 182Ta 114.43 d 181Ta(n,γ)182Ta 100 22.0 56.4 187W 23.9 h 186W(n,γ)187W 28.6 37.2 33.9 aData for 20°C. bBurnup cross section, σb, for Co-58 is 1.9×10−21 cm2.
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Radiochemistry in Nuclear Power Reactors Figure 2–6. Specific Activity of Major Corrosion Products as a Function of Irradiation Time with Neutron Flux
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Radiochemistry in Nuclear Power Reactors 2.6 REFERENCES (1) C.M.Lederer et al., "Table of Isotopes," 7th ed., John Wiley & Sons, Inc., New York (1978). (2) "Handbook on Nuclear Activation Cross Sections," Technical Report Series No. 156, IAEA, Vienna (1974). (3) A.C.Wahl, "Mass and Charge Distribution in Low-Energy Fission," Proc. 1st International Atomic Energy Symposium on Physics and Chemistry of Fission, Vienna, Austria (IAEA, 1965). (4) B.Ehrenberg and S.Amiel, Phys., Rev. C, 6, p. 618 (1972). (5) A.C.Wahl et al., Proc. 2nd International Atomic Energy Symposium on Physics and Chemistry of Fission, Vienna, Austria, p. 813 (IAEA, 1969). (6) B.F.Rider, "Compilation of Fission Product Yields," Vallecitos Nuclear Center, 1981 (NEDO-12154–3C), ENDF-322 (October 1981). (7) T.H.Pigford, "Environmental Aspects of Nuclear Energy Production," Am. Rev. Nucl. Sci., Vol. 24, 1974, p. 515. (8) H.S.Bailey, et al., Nucl. Tech., 17, 1973, p. 217. (9) H.Umezawa, et al., J. Nucl. Sci. Tech., 10, 1973, p. 489. (10) W.B.Wilson, et al., Nucl. Safety, 29, 2, 177 (1988). 2.7 BIBLIOGRAPHY G.Friedlander, J.W.Kennedy, E.S.Macias and J.M.Miller, "Nuclear and Radiochemistry," 3rd ed., John Wiley & Sons, Inc., New York (1981). D.C.Layman and G.Thorton, "Remote Handling of Mobile Nuclear Systems," U.S. AEC, January 1966 (TID-21719).

subset: commoncrawl


text: The Current Cinema December 25, 2006 Issue Best and Brightest "Dreamgirls" and "The Good Shepherd." By David Denby Table of Contents Near the beginning of Bill Condon's movie adaptation of the musical "Dreamgirls," Jimmy Early (Eddie Murphy), a soul singer loosely based on James Brown, meets his three new backup singers: Effie (Jennifer Hudson), Deena (Beyoncé Knowles), and Lorrell (Anika Noni Rose). Jimmy, eager to score with all of them, gets down on his knees in mock submission. "Exactly what would you like Jimmy to do for you?," he asks. The youngest, Lorrell, giggling with excitement, says, "You could teach us the song." Moving to a piano backstage, Jimmy begins "Fake Your Way to the Top," one of the many fast-boiling numbers that the composer Henry Krieger and the lyricist Tom Eyen wrote for the original show, which was directed and choreographed by Michael Bennett and opened on Broadway twenty-five years ago this month. As Eddie Murphy begins singing, a pianist takes his seat, and Murphy walks in front of the instrument and cues each of the girls to sing the decorative backup line, "round and round"—Anika Noni Rose in her giddy high soprano, Beyoncé Knowles in a softer, tamer style, and Jennifer Hudson in a throaty, deep mezzo that leaps into an exultant riff. Murphy whirls around, and suddenly, without any transition, he's onstage, before an audience, doing the song with the three girls singing nearby. The sigh you will hear across the country in the next few weeks is the sound of a gratified audience: a great movie musical has been made at last. For me, and perhaps for many others, the Oscar-winning "Chicago," with its overwrought heave and strain, its dancing bodies broken into piston-thrust fragments, wasn't even close to the real thing. "Dreamgirls" is a singing, not a dancing, musical, so Condon, who wrote "Chicago" (and who directed "Gods and Monsters" and "Kinsey") is never tempted to break bodies into pieces. In any case, we can tell from the easy fluency of the movie that his basic urge is to merge and join things, not to separate them. Again and again, he lets a declaration of love, an argument, a music-business event flow directly into the next moment, and then into the next, in an exhilarating organic structure with liquid joints. "Dreamgirls" is a barely disguised account of Berry Gordy and the rise of the Supremes; it features some brief, crisply written expository passages and several photo-montage sequences that detail the emergence of black artists as a major commercial force in American music of the nineteen-sixties—all seen against a background of the Detroit riots and the civil-rights movement. But, apart from these episodes, just about everything is sung, and, in this movie, the songs aren't merely commentary on the narrative and the personal conflicts; they are the narrative and the drama—a rousing success story that is also (though we don't realize it right away) a parallel story of failure. When we first see Curtis Taylor, Jr. (the Berry Gordy character, played by Jamie Foxx), he's a hustler with pomaded hair and a roving eye who's lounging backstage at a talent show. Quickly, he aces out an aging manager (Danny Glover) and takes command of the three girls, their songwriter, C.C. (Keith Robinson), and Jimmy, too. Curtis softens and homogenizes the girls' sound, dresses them in elaborate wigs, white satin dresses with trumpet hems, and elbow-length gloves, and creates a sparkling landscape of light around them. He succeeds in leading them out of the wilderness of R. & B. and into the promised land of the pop charts. But one of the girls doesn't fit—the beautiful but oversized Effie, the lead singer with a big voice and a bigger mouth. When Curtis replaces her as the lead with the demure Deena, she explodes, and the movie reaches a sustained peak with two long, interlocked numbers: "It's All Over," in which Effie holds out against no fewer than four characters, singly and in pairs, the group breaking apart and reforming again and again; and then the song that stopped the show on Broadway, "And I Am Telling You I'm Not Going," performed by Effie alone. Jennifer Hudson, the young singer who was voted off "American Idol" for the same reasons that Effie gets tossed out of the group here, begins quietly and reaches a pitch of wailing defiance that goes on forever. As a piece of singing, this performance is intentionally over the top—exciting but almost scary in its intensity. Effie is gone but not forgotten: she will sing better than ever, and in her own soulful, all-out style, which is radically different from the processed technique and commercial-dance-music rhythms of the revamped Dreamgirls. At the same time, Beyoncé Knowles's Deena, whom we had hardly noticed before, moves into the center of the movie. Deena is based, of course, on that glamorous imp Diana Ross, and the long-waisted, utterly beautiful Knowles gets photographed, as Ross did, in an infinite number of extravagant costumes and hairdos. The Dreamgirls, with their polished routines that appeal to white audiences, go through the roof, and Deena becomes a diva, an icon, an image with little sense of her own reality. Curtis had chosen her as the lead precisely because her singing was bland, and, at first, she plays along, singing well but without individuality. But when Deena decides to break away from Curtis, Knowles, without much makeup, her long hair hanging straight down, sings an anthem of liberation called "Listen" with shattering power. Knowles can do anything she wants musically; her acting is still rudimentary, but she has the presence and the talent to spark a serious revival of film musicals. Foxx, keeping his voice low, extends his range as the cruelly manipulative Curtis, but the highest acting honors go to Eddie Murphy. His Jimmy, a screamer who loves to throw himself down onstage, tries to go sweet and soft, like Johnny Mathis, but can't do it and falls apart in public. Jimmy has a puzzled desperation that Murphy has never demonstrated before. Throughout "Dreamgirls," Condon pursues two tracks: he celebrates the chart-topping success of groups like the Supremes, but he makes it clear that what they have achieved, however exciting, is not the same thing as artistic success. Effie, too idiosyncratic for pop, remains the artist. "Dreamgirls" fulfills the ecstatic promise inherent in all musicals—that life can be dissolved into song and dance—but it does so without relinquishing the toughest estimate of how money and power work in the real world that song and dance leave behind. In Robert De Niro's "The Good Shepherd"—one of the most impressive movies ever made about espionage—the hero, Edward Wilson (Matt Damon), who becomes an agent in the O.S.S. during the Second World War and then a higher-up in the C.I.A., goes through life with just a single hobby. He spends hours placing ships in tiny bottles. A precise, selfless, and stolid man who speaks as little as possible, he rides a Washington bus each morning in a standard-issue raincoat and a gray hat, apparently just another government employee heading to work. Wilson is shrewd but entirely without humor—a joke, after all, might give something away. Sex is also out of the question. Every time he makes love to a woman—indeed, any time anybody makes love in this movie—the result is a disaster, for sex is an unguarded expression of self that can reveal secrets or leave one open to blackmail. Wilson is a superb functionary of the American colossus that grew out of the war, during that serious time when East Coast Wasp aristocrats—Dean Acheson, George Kennan, John J. McCloy, and others—appointed themselves guardians of the nation. This movie, which the screenwriter, Eric Roth, struggled to get made for years, is a sharply knowing social history of the C.I.A. and also a melancholy account of the hollowing out of one of its key players. (Wilson appears to be an amalgam of James Jesus Angleton and Richard Bissell.) Moving backward and forward in time, and netted with an intricate array of hints, secrets, warnings, and echoes, the story of Edward Wilson is the narrative embodiment of paranoia. Just after the failed Bay of Pigs invasion, in April, 1961, an intentionally slurred audiotape of a couple making love, accompanied by an indistinct photograph, is deposited under Wilson's door. The evidence—or whatever it is—may contain a clue to why Fidel Castro's forces knew in advance where the invaders were landing. As in a John le Carré novel, Wilson is being tantalized with fragments. Someone in a foreign intelligence service is presenting him with a riddle whose solution will draw him out of his Washington fortress and expose and destroy him. As the material is enlarged, altered, and repeatedly analyzed, the filmmakers fly back through time, to 1939, when the young Wilson, after a sterling rendition of Gilbert and Sullivan's "I'm Called Little Buttercup," in drag, is inducted into Yale's Skull and Bones society, a kind of mystic brotherhood that humiliates its inductees and excludes everyone else. From this group of young gents General Bill Sullivan (i.e., "Wild Bill" Donovan, the founder of the O.S.S.), played by De Niro, recruits his men. (Jews, Catholics, and Negroes need not apply.) Wilson jumps into marriage with a socially prominent young woman (Angelina Jolie), only to leave her for six years of service in London and postwar Berlin, where he works with a British agent (Billy Crudup) modelled on Kim Philby—a man of immense charm who turns espionage into an amusing dance of treachery. In Skull and Bones, and then in the agency, Wilson is imbued with the fraternal virtues of loyalty and trust. But the operational truth of espionage is the opposite—the most intricate and savage betrayal. If necessary, in this movie intelligence services will kill their own agents when they know too much. "The Good Shepherd" has a reticent beauty (the colors are subdued and blended) and a sombre exactitude that gives way, now and then, to episodes of anguished emotion. Like Al Pacino in "The Godfather II," Matt Damon recedes further and further into himself; his Wilson is as much a victim as a hero, a man who can't, or won't, protect those closest to him. A good part of the time, he operates in a fog of surmise and unprovable suspicion. For spies, particularly for moles and double agents, time is meaningless, since the job of penetrating another country's secret service may take a decade or more to pay off. Something a man says to Wilson—a bit of chatter, an inadvertence—may mean nothing when he hears it but a great deal a dozen years later; the movie sews these moments together, and when the pattern becomes clear we are both impressed and chilled. De Niro has directed only one movie in the past—"A Bronx Tale"—but long stretches of this one are masterly: swift, terse, but never rushed. In crass operational terms, the C.I.A. shown here wins a few (overthrowing a popular leftist leader in South America) and loses a few (the Bay of Pigs). The movie firmly plants the suggestion that the agency persistently overestimated Soviet capabilities in order to justify its own existence. But "The Good Shepherd" won't ask the ultimate question: Would the Cold War have come out any differently if hundreds of agents on both sides hadn't been killed? Isn't espionage just a closed, circulatory activity for debonair thugs—intellectuals with a sense of danger and an inordinate capacity for deception? They all seem to be making ships in a bottle, which is not quite the same thing as launching a fleet of seaworthy craft. ♦ David Denby has been a staff writer and film critic at The New Yorker since 1998. 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Dr. Tricia L. Ferrin, DO
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Dr. Tricia L. Ferrin has been practicing medicine for 11 years. Dr. Ferrin graduated from the Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 2003. She practices medicine in Roy, UT and specializes in Family Medicine. Dr. Ferrin is affiliated with Mckay Dee Hospital and Intermountain Medical Center. She speaks English and Spanish.
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text:
PEP drop at DLA Piper after Middle East woes
Readers' comments (28)
It seems as night follows day, as soon as there's an article mentioning the DLA in the Middle East, the knives, the bleating and the whining come out.
Move on. If you can't - seek professional help.
It is particularly disappointing to read comments made anonymously about individuals at the firm. Surely if these people are worthy of criticism, you should have no problem in putting your name to the criticism levelled against these people?
Declaration of interest - yes, I used to work at DLA in Dubai
For all the comments which suggest that people who complain about DLA "get a life and come out of the shadows", please stop. DLA (Middle East) was operated as a cowboy outfit (i mean look at the article which we are commenting on, there is a huge drop in profits and the Middle East operations are to blame!!!). As for the stealth element, the only people who acted dishonestly and in the shadows were the partners and HR at the aptly named DLA Sniper. As for those valiant defenders of the DLA brand, im assuming you are only defending them because you were apart of the Mallesons clique or your hoping that your next employer, should they ever read these posts get the "other side".
Interesting that DLA's revenue peaked at GBP20million. Even at this level, DLA were seriously underperforming the market, with the established firms achieving double that in 2008/9. If DLA's headcount figures at the time were to be believed they had more partners and lawyers than any of these other firms making it doubtful there has ever been a profit, despite all the DLA generated hype at the time.
It will take DLA a long time to catch any serious competitors at that rate even if the inevitable interest in the firm's very public train smash eventually subsides. And if you want to avoid the kind of adverse comments posted here, treat your people properly; criticising them for airing their greivances after the event does not help at all
Dear Nathan,
Is it really you. You should be the one to know that in Dubai one must act anonymously.
I really wonder if Abdul Aziz has read the Dubai Code of Conduct? Are the Business Development activities conducted by him allowed in Dubai?
How anyone can read the article and make the "unstoppable" comment in the previous post defies imagination!
Dear ex DLA,
Yes it is really me.
My comments about spekaing openly are directed to the criticism of people who are no longer in Dubai, which I think are the majority of people named in the various posts.
As you have wisely noted, there are certain legal issues with putting your name to criticism of people in Dubai that a prudent person should take heed of.
Unfortunately Abdul Aziz was appointed after I left, so I cannot comment on what he is doing/has done.
The comments section on The Lawyer.com: You will never find a more wretched hive of scum and villainy. We must be cautious.
One more thing, not only did they screw us lawyers but the support staff as well. Secretaries, drivers, office assistants. DLA is a joke. Hope the partners feel ashamed of what they have done.
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text:
As we inch closer to the NBA Draft we also inch closer to Kevin Love maybe, potentially, eventually being traded. The newest rumors have the Warriors as the front-runners to land Love's services except for the fact they won't include Klay Thompson in a trade. Obviously the situation needs to be watched closely as the Warriors adding a player of Love's caliber instantly vaults them towards the top of the Western Conference standings. On to today's links:
The Rundown: A more in-depth breakdown of the Thompson/Love situation from above, explain by Marc Stein and Ramona Shelburne.
After it appeared that the Warriors were prepared to part with Thompson in a deal to land Minnesota's Love, sources told ESPN.com that Hall of Fame consultant Jerry West and new Warriors coach Steve Kerr have voiced opposition to surrendering both Thompson and a future first-round pick to the Timberwolves along with former All-Star forward David Lee for Love and Wolves guard Kevin Martin.
A Max for Klay? Klay Thompson reportedly wants a max contract when his deal is up. A breakdown of why he isn't worth it.
More Trade News: In other trade news the Chicago Bulls may be trying to acquire Arron Afflalo.
Another Love Situation? There is another player that may be in the center of a Kevin Love like rumor storm next summer; Portland's LaMarcus Aldridge. HoopsHabit breaks the situation down really well here.
Tread Cautiously with Tucker: Mike Prada on why teams (including our New Orleans Pelicans) should be careful with PJ Tucker and his "offensive improvement."
Checkered Past: Finally Jimmy Smith looked at the Pelicans draft history since the franchise moved to New Orleans.
Tags: New Orleans Pelicans


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This game demonstrates a preference for both Radeon cards and GDDR5's elevated bandwidth capabilities. At high resolutions, even the Radeon HD 5550 GDDR5 outpaces the Radeon HD 5570 DDR3. The GeForce cards suffer a disadvantage here.
Previous Next
- Enter The Radeon HD 5550
- The Radeon HD 5550 Architecture
- HIS Radeon HD 5550 DDR3 And GDDR5
- PowerColor PCS+ HD 5550 GDDR5
- HIS Radeon HD 5570 GDDR5
- Test Setup And Benchmarks
- Benchmark Results: 3DMark Vantage
- Benchmark Results: Crysis
- Benchmark Results: Far Cry 2
- Benchmark Results: World In Conflict
- Benchmark Results: Aliens Vs Predator (DirectX 11)
- Benchmark Results: DiRT 2 (DirectX 11)
- Overclocking Benchmarks
- Power, Temperature, And Noise Benchmarks
- Conclusion: GDDR5-Equipped Cards Show Promise
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0amk09 , August 18, 2010 6:44 AMVery interesting but strange article.
crysis 2 'on the horizon'?
either you have not heard the terrible news, or you are a far more patient man than I.
2gkay09 , August 18, 2010 7:02 AMNo surprises IMO as it was the same with the HD 4650/ 4670...the 1GB DDR2 was slower than the 512MB DDR3...
8Anonymous , August 18, 2010 7:55 AMYou've mixed up the HIS5550 and HIS5570 end-on port pictures I think. You state the 5550 GDDR5 has no VGA and one is shown and vice-versa for the 5570 GDDR5. In fact it looks like quite few of the pictures are misplaced.
0edlight , August 18, 2010 9:03 AMWhen you do the HQV tests, could you investigate drivers? They have a desktop color and a video (movies) section. With my 4670, it's not always clear which videos the video section works on. It varies between Win 7 and XP. Basically it works on movies in the overlay, and/or players with hardware acceleration turned on. In Win 7 it works on the flash videos, in XP it doesn't. In XP in video you can adjust Gamma, in Win 7 you can't. In XP the brightness etc. adjustment in video is independent from the desktop. In Win 7 desktop adjustments to brightness etc. affect the videos, even in the overlay. In XP the Dynamic Contrast button is there, but does nothing.
After driver 10.4, in XP, video brightness and other adjustments just don't work. If you want to adjust the video you have to go back to 10.4.
Contrast this with nvidia. As far as I know, their drivers work properly, with Gamma adjustment for video, and video brightness etc. separated from desktop brightness etc.
But, in the last nvidia drivers I tried, there are problems with profiles. While you're in video, you can't save the settings as a profile. You have to go to desktop. Then you can save them. You used to be able to right-click on the tray icon and select your profiles. In the last nvidia driver I checked, you couldn't do that. At least you can do that in the ATI drivers. You can't sort the darn things, though.
So, to select a profile in nvidea you'd always have to open the control panel. In ATI, if you've come upon a dark video and you have several profiles to try on it, it's fast and easy by right-clicking in the tray.
I don't think the programmers actually use the control panels themselves. Such awful logic!
One last thing I'd like to know from the coming article is if the nvidia video section works on flash videos (with the 10.1 flash) in XP. It must in Win 7.
8dconnors , August 18, 2010 9:33 AMwelshmousepkcrysis 2 'on the horizon'? either you have not heard the terrible news, or you are a far more patient man than I.
I would say anything under a year is "on the horizon" so a March 2011 street date lines up pretty well with that statement.
1LordConrad , August 18, 2010 9:58 AMWrong connector picture for the HIS 5570?
1LordConrad , August 18, 2010 9:59 AMOr maybe the caption is wrong...
8Onus , August 18, 2010 10:15 AMI would like to have seen the HD4670 in the benchmarks; I think that is more likely competition than the HD4650, which was beaten pretty badly.
6belardo , August 18, 2010 10:56 AMYeah, the 4670 does belong on this benchmark article, but for the most part - the 5570 OC is on par with a standard 4670. Give or take.
But what really belongs here is the 5450!
That would show how much MORE powerful the 5550/70 cards are... Yeah I know, about 4x... but still it should be there. Maybe the 5470 will come out
Current pricing of the lower 5000 & 4000 series (Order of performance)
5450 = $40~70 ($55+ = 1GB useless versions)
4650 = $50~80
5550 = $65~90 (DDR2 or DDR3 ver)
4670 = $70~90
5670 = $85~105
5750 = $125~150 (Ouch - considering they cost less to make that 4670s)
First, when it comes to DX11 games, they are too much for the 5550 and below - but under DX10 - they do pretty good. So for your $70~75, you might as WELL buy the 4670 over the 5550s and 5570-DDR3. Now if the the 5550-DDR5 sells for the same price or less of a 4670, then it maybe worth it.
Considering the age of these cards, the 5670 should be $80~90... as it doesn't touch the $100 4850! But the 4850 & 57xx requires more power/bigger PSUs.
A non-eyeinfinity version of a 5750 for $100 would be a sweat card to get that would hammer the nail into the 4800 series.
0Reynod , August 18, 2010 11:11 AMThanks Don.
0elbert , August 18, 2010 11:53 AMI would have liked to have seen a 5570 dd3 1gb overclock.
Quote:Unlike the HIS Radeon HD 5550 GDDR5 sample we have, the HIS Radeon HD 5570 GDDR5 card is not equipped with a DisplayPort output, and therefore triple-monitor Eyefinity is not a possibility. The card has a DVI, an HDMI, and a VGA output instead.
The image above this statement has no VGA but does have a DisplayPort. I'm kind of at a loss here as either the statement or the image is incorrect. Also Unlike should be like if the statement is correct having them both without Displayport.
I really dont like the graphs. They are very hard to read. I would like the see best to worst in order graphs.
0JeanLuc , August 18, 2010 12:03 PMWhat's up with the noise chart? I was shocked when I saw the Sapphire 4650 noise levels then I realised it was only 6dcb higher then the HD5550. It's very misleading can you please fix it as that Sapphire looks as it it's 6 times louder then anything else.
1forsayken , August 18, 2010 12:55 PMThe 4850 is still very much available for $90 and blows every card in this benchmark out of the water and usually beats the 9800GT. I'd still get this board over all others if I had only $100 to spend on a card and you want to game. I do have a 5670 and will admit that I am very impressed with heat/noise so that is a wise choice as well for a lower-power system. It runs SC2 on "high" and BC2 on good enough settings to be visually appealing.
2cknobman , August 18, 2010 1:46 PMWould like to have seen the 4670 on here for comparison. I picked up my 4670 last October on an egg special for $39.99 after rebate (and yes I finally got my rebate after 4 months).
My suggestion to anyone wanting to buy a $50 - 100 card is wait for specials and rebates because you can often get one well below market rates if you shop around.
0kresso , August 18, 2010 2:14 PMcknobmanWould like to have seen the 4670 on here for comparison. I picked up my 4670 last October on an egg special for $39.99 after rebate (and yes I finally got my rebate after 4 months). My suggestion to anyone wanting to buy a $50 - 100 card is wait for specials and rebates because you can often get one well below market rates if you shop around.
I got that same deal and couldn't be happier (ok I could but, for that price the 4670 was a steal)
0wolfram23 , August 18, 2010 2:33 PMInteresting low end GPU. ATI is really pushing to get DX11 cards out there, for people of all budgets.
0rohitbaran , August 18, 2010 2:41 PMSince they have launched these 2 cards now, it looks like either the refresh isn't around the corner or it is probably only for the top end models.
2COLGeek , August 18, 2010 3:02 PMI have used several 4550/4650 GPUs and have been very pleased with all of them. It comes as no surprise that their HD5XXX cousins perform equally as well in terms of cost and processing. Not all users are power users, nor are all users OCing their rigs. This class of GPUs really does meet the needs of most users and at a pretty decent price point. It is hard to not respect ATI for producing capable GPUs for the masses.
-5WarraWarra , August 18, 2010 3:05 PMInteresting.
I can see a price point for this hardware but why upgrade from a NV9800gtx to anything less than a Ati5770.
NV9800gtx newegg $135
5670 newegg $110
5770 newegg $135
I can not see anyone not willing to sacrifice 2 hamburgers or a few beers and rather get a 5770 instead of a 5670 or even a 9800gtx. No one can be this poor or stupid.
IE: what the ??? is the use of these low end mobile phone video cards ?
If AMD stops wasting money on these low end junk and rather have fewer models, spend more time producing useful video card then they can have decent prices for the server headless video card like the 5850 that should be "$150" video card instead of this stupid list of prices and models of uselessness.