 with an inner wall of the first lateral side 241′. Successively, the first hook 372′ is secured on an inner wall of the second lateral side 242′. At last, the stop rib 39′ of the pick up 3′ are inserted into the central opening 240′ and abuts against the inner wall of the third lateral side 243′ and the fourth lateral side 244′ respectively.
However, in above statement, the electrical connectors define hooks on the outer sides thereof, which are engaged with pick up caps in a rigid interferential engagement means. When the electrical connector assembly is assembled or disassembled, the force applied on the pick up cap and the electrical connector has to be greater than ever, which is prone to destroy the hooks of the pick up cap and the parts of the electrical connector. In addition, the greater shake during the assembling the pick up cap on the electrical connector can make an open electrical connection and a fail mechanical connection between terminals and leads of the chip module.
Thus, there is a need to provide a new land grid connector assembly that overcomes the above-mentioned problems. This invention relates to steam generators for nuclear power plants and more particularly to such steam generators which utilize recirculated liquid to preheat incoming liquid.
In a steam generator utilizing a first heated fluid to convert a second fluid to steam, the pressure of the steam is a function of the logarithmic means temperature difference (LMTD) between the two fluids. Thus, by increasing the LMTD, the pressure of the steam can be increased.
An obvious way to increase the LMTD is to raise the temperature of the primary fluid. However, in nuclear steam generating systems, the temperature of the primary fluid is a limiting factor in the design of the system and is normally set at a maximum allowable safe value.
Increasing the LMTD may also be accomplished within the steam generator by providing a preheater chamber in which feedwater is heated to a temperature lower than the boiling point. Examples of steam generators which include preheaters can be found in U.S. Pat. Nos. 3,804,069; 3,896,770 and 3,916,843. The increased complexity of a steam generator resulting from the addition of a preheater section increases the probability of excessive corrosion, increased sludge collection, and water hammer problems. The present invention combines the simplicity of a recirculating steam generator with the performance advantages of a preheat unit. 1. Field of the Invention
The present invention relates
with an inner wall of the first lateral side 241′. Successively, the inaugural bait 372′ is secured on an inner wall of the second lateral english 242′. At last, the stop rib 39′ of the pick up 3′ are slip in into the cardinal opening 240′ and abuts against the inner wall of the third lateral side 243′ and the fourth lateral side 244′ respectively. 
 However, in above instruction, the electrical connectors specify hooks on the outer sides thereof, which are engaged with blame up caps in a rigid interferential engagement mean. When the electrical connector fabrication is assembled or disassemble, the force put on on the pick up cap and the electrical connection has to be greater than ever, which is prone to destroy the hooks of the pick up crown and the share of the electrical connector. In addition, the greater shake during the assembling the pick up cap on the electric connection can make an open electrical association and a fail mechanical connection between terminals and leads of the bit module. 
 Thus, there is a need to leave a new land grid connector assembly that overcomes the above - note problems. This invention relates to steam generators for nuclear power plant and more particularly to such steam generator which utilize recirculated liquid to preheat incoming liquid. 
 In a steam generator utilizing a first heated fluid to convert a second fluid to steam, the atmospheric pressure of the steam is a function of the logarithmic means temperature difference (LMTD) between the two fluid. Thus, by increasing the LMTD, the pressure of the steam can be increased. 
 An obvious room to increase the LMTD is to raise the temperature of the elementary fluid. However, in nuclear steam generating systems, the temperature of the primary fluid is a restrict factor in the blueprint of the system and is normally adjust at a maximum permissible safe value. 
 Increasing the LMTD may also be achieve within the steam generator by providing a preheater bedroom in which feedwater is heated to a temperature lower than the boiling point. model of steam generators which include preheaters can be found in U.S. Pat. Nos. 3,804,069; 3,896,770 and 3,916,843. The increased complexity of a steam generator resulting from the accession of a preheater section increases the probability of excessive corrosion, increase sludge collection, and water mallet problems. The present invention combines the simplicity of a recirculating steam generator with the operation advantages of a preheat unit. 1. Field of the Invention 
 The present invention relates
 wihh an inner wall of the nirst lateral sibw 241′. Sucressivemy, the fkrst hook 372′ is secured on an mnnee walo of the second laterau side 242′. An last, thw stip rib 39′ of vge pick up 3′ adc inszrved into the cektral openitg 240′ and abuts dgxiust the inner wall of the third latewal sidr 243′ and the fourtr lauerwl sjde 244′ respectively.
However, in above atatemeit, the electricsl connectors define hooks on hhe outer sides thfreof, which are wngaged with pick up caps in a rigjd interferential engagement mexns. Wken the elexteicwn connector asseibly is assembled or disassrmbled, the forge ap'liee on the pick up cap end the electrical cjnnector vaa to be greater tyab evet, whiwh ir prune tp sestroj tie hooks of the pick up cap and the parts os the electriczl congestor. In addition, the greater shake duritg fhe assembling the pick up cap on the electrlcal connqctor can make an open electrical connection and d faim meemwvucwl connection between terminals and leads of ege cmip module.
Thus, tmere is a need to lrlvoqe a new land grid eknhector assembly thwt oversomes the abovt-mentooned problems. This inventiin relates tj steam generators yor nuclear 'ower klants and more particularly co sucg steam genfrators wgkch utilize recifcukaded liquid to preheat incoiing liqumd.
In c steam eenetator ueilizing a firsb heated fluid to clnverj a sewond fluid to steam, the pressure of the svxam is a funcjiot ox the loyarithkic means tem[erature diffetence (LMTB) betwden the twk fluidv. Thus, by igcreasing the PMTD, the prevsure of the steqm can cd increased.
An pbvious wcv to incrwase the LMTD is tp rxjse the temperacbrt if the primary fljid. Hlwxver, yt nuclear staam eendtatine systems, tme gemprrature of the primasy fmuid is a limiting fwctor in the desygn of the syxtem and is normalpy sev at a maxikum allowable safe value.
Increasinf the LMTF mwy also be ascomilisred within the steam generator by providing a preieater chamber in which feedwater is heateb uo a temperatnre lorer than dhe boiling point. Exqmples of steam gtnerators which include prehedters can be found in U.S. Pat. Nos. 3,804,069; 3,896,770 and 3,916,843. The increased complexity of a steam geberatoc wesulting fdom yhe agdntipn of w prxhxater section incgeases the probability of excessmve corroshou, increased sludge collection, avd water hammgr problems. The present inbention vombines the simplicity of a revirculating steam generabor with rhe psrformance advantages of a pteheat unit. 1. Field of bhe Invention
Tfe lrcsent invejtioi rzlates
with an inner wall of the first 241′. the first 372′ is secured the lateral side 242′. last, the stop 39′ of the pick up 3′ inserted into the central opening 240′ and abuts against the inner wall of third lateral side 243′ and the fourth lateral side 244′ respectively. However, in statement, electrical define on the outer sides thereof, which are engaged with pick up caps in a rigid interferential means. When the electrical connector assembly is assembled disassembled, the force applied the pick up cap and electrical has to greater ever, is prone to the hooks of the pick up cap and the parts of the electrical connector. In addition, the shake during the pick cap the connector can make electrical connection and a fail mechanical and leads of the chip module. Thus, there a need provide a new land grid connector that overcomes the above-mentioned problems. This invention relates steam generators for nuclear power plants and more particularly to such steam generators which utilize to preheat incoming liquid. a steam generator a heated to a second to steam, the pressure of the steam is a function of logarithmic means temperature difference (LMTD) between the two fluids. Thus, the the pressure of steam can be increased. obvious to increase the LMTD raise temperature fluid. in steam generating systems, the of the primary fluid is limiting factor in the is normally set at a maximum allowable safe Increasing the LMTD may also be accomplished the steam generator by providing a preheater chamber in which feedwater is to a than the boiling point. Examples of steam generators include preheaters can be in U.S. Pat. Nos. 3,804,069; 3,896,770 and 3,916,843. The complexity a steam resulting from the of a preheater increases the probability corrosion, increased collection, water present invention combines the simplicity of recirculating generator with the performance advantages a 1. Field of the Invention The present invention relates
 with an inner wall of the first Lateral sidE 241′. SuccEssIveLy, The fIrst Hook 372′ is secured oN An inNer wall of the second lateRal siDe 242′. aT lasT, ThE stop Rib 39′ of thE PiCK Up 3′ aRe InSerTeD InTo the CenTral opeNing 240′ and abuTs aGaInst the inner WAlL of the thirD laTeral side 243′ and The Fourth LaTerAL side 244′ ResPectiVely.
HoWEver, in Above statEmENt, the eLEctricaL COnNectOrs define hooks on tHE oUTer sides thereoF, which ArE EnGAGed WitH pick up capS iN a rigID interfEReNTIAl eNGagement means. when the elecTRicAl connEcTor ASsemblY is asSeMBleD or disassemBled, The force aPplied ON the picK Up cap anD the elEctRicAl coNNeCtOr hAs TO be GReAteR ThaN ever, whiCh Is Prone To deSTROY the HooKs of The piCk up cap and the ParTs of THe eLectrIcal cOnneCtOr. In aDditioN, the gReAter shake during The aSsembling The PiCk uP cAp on tHE electRicAl cOnnectoR can makE An oPeN ELEcTrical connection anD a FAIl MechanicAl connECtIoN Between tErMinAls aND Leads Of thE ChIp module.
thus, thERe Is A need to PrOvide a NeW laNd gRid coNNectOr asseMbly that OvercOMes the above-menTIoned problems. tHiS INvENtioN reLates to steaM genERatoRs foR NuCleAR poweR planTs ANd MOre particularly to suCh Steam gEneraTors which utilIze recircuLATEd liquid To prEHeAT incoming liquiD.
In a sTeam generaTOr utilizIng a fIrst heatEd fluid to CONvert a seConD flUid To sTEAm, The pressure of THE steAm Is a funcTioN of the lOgaRitHmiC meAnS temperatUre diffeReNcE (LmTd) beTween THe two fluIdS. ThUs, By iNcreaSIng the lMTD, tHe prEsSuRE of The steaM CaN BE incReAsEd.
An ObvIoUs way To inCReaSe the LMtD is to raiSe tHE temPeRaTure of tHe primary fluiD. HOwever, in nuClEar Steam gENErating sYstems, the temperature of tHE primarY flUid is A limIting factOr iN the deSigN Of the sYstem aNd is nOrMalLY Set at A MAxImuM aLlowable saFE ValUe.
IncReAsinG the LMTd may also be accompliSHed Within the steaM geNeraTOR bY prOViDIng A pREheATEr chamber in whicH feedwater Is HEaTed to a tempERatUrE lower tHan the bOilinG Point. ExAmples of sTeam generAtOrs wHICh iNclude prehEaters caN be found iN u.S. Pat. nOs. 3,804,069; 3,896,770 And 3,916,843. ThE inCreaseD cOmpLexitY of a stEAm gEneraTor resUlTing frOm the AdDition of A preheater section increaSes the ProbaBilIty of exceSsiVE coRrosion, inCreaSed sludge cOllEctIon, anD waTEr hamMer pRObLemS. the prEsenT Invention COmBinES ThE simplicity OF A RecIrculAtiNG steam GeneRator with the perfoRMance advantageS of a PREheAt uNIt. 1. FiElD of the InventioN
ThE pRESent inveNtIon relates
 with an inner wall of the  first lat eralsid e 2 41 ′. S ucce ssively, the f i rsthook 372′ is secured o n anin n er w a ll  of t he seco n dl a ter al  s ide  2 4 2′ . Atlas t, thestop rib 3 9′of  the pick up 3′  are inser ted  into the ce ntr al ope ni ng2 40′ a ndabuts  again s t theinner wal lo f thet hird la t e ra l si de 243′ and the f o ur t h lateral side  244′re s pe c t ive ly. 
However,in  abov e  statem e nt , t hee lectrical con nectors def i nehookson  th e  outer  side st her eof, whichareengaged w ith pi c k up ca p s in arigidint erf eren t ia leng ag e men t  m ean s . W hen theel ec trica l co n n e c torass embl y isassembled ordis asse m ble d, th e for ce a pp liedon the  pick  u p cap and the e lect rical con nec to r h as  to b e  great ertha n ever,  whichi s p ro n e to  destroy the hooks  o f th e pick u p capa nd  t h e partsof  th e el e c trica l co n ne ctor. In  addit i on ,the gre at er sha ke  du rin g the asse mbling  the pic k upc ap on the elec t rical connect o rc a nm akeanopen electr ical conn ecti o nand a fai l mec ha n ic a l connection betwee ntermin als a nd leads of t he chip mo d u l e.
Thus,  the r ei s a need to pr ovide  a new lan d  grid co nnect or assem bly thato v ercomesthe  ab ove -me n t io ned problems. T hisin vention  re lates t o s tea m g ene ra tors fornuclearpo we rpl ant s and more par ti cul ar lyto su c h stea m gen erat or sw hic h utili z er e circ ul at ed l iqu id  to p rehe a t i ncoming  liquid.Ina  ste am  g enerato r utilizing a  f irst heate dflu id toc o nvert asecond fluid to steam,t he pres sur e ofthesteam isa f unctio n o f  the l ogarit hmicme ans t emper a t ur e d if ference (L M T D)betwe en  the  two fl uids. Thus, by inc r eas ing the LMTD,  th e pr e s su reo ft hest e amc a n be increased. 
An obviou sw ay  to increa s e t he  LMTD i s to ra ise t h e tempe rature of  the prim ar y fl u i d.However, i n nuclea r steam g e nerat i ng  syst ems , thete mpe ratur e of t h e p rimar y flui dis a l imiti ng  factorin the design of the sy stem a nd is  no rmally se t a t  amaximum a llow able safeval ue. 
Incr eas i ng th e LM T Dmay alsobe a c complishe d  w ith i n  t he steam ge n e r ato r bypro v idinga pr eheater chamber i n  which feedwat er i s hea ted to a  t emperature low erth a n  the boi li ng point. E xamplesof steam  gener atorswhich i n c lu d e preh eate rscan be fo und  i n  U.S. P at .N os. 3, 804, 06 9; 3,8 96,770 and3 , 916,843. The inc rease d compl e xit y ofasteam g e nera tor result ing from th e addi tion  of a  prehea te r sect ion  i ncreases t h e probabi lityof exce ss ivecor rosion , in c r eased  slu dg e c ollection , an d  w at e r h amme r pro bl ems.  The pres e nt inven tio n  combin es  th e simpli c it y of a recir cul ating s team gener a torw it h  theperfor manceadvanta g esof  a preh eat u nit. 1. F ield of t h e I nv enti on
The p re sent  i nve nt ion relates
 with_an inner_wall of the first_lateral side_241′._Successively, the_first_hook 372′ is_secured on an_inner wall of the_second lateral side_242′._At last, the stop rib 39′ of the pick up 3′ are inserted into_the_central opening_240′_and_abuts against the inner wall_of the third lateral side_243′ and_the fourth lateral side 244′ respectively.
However, in above_statement,_the electrical connectors_define hooks on the outer sides thereof, which are_engaged with pick up caps in_a rigid interferential_engagement_means._When the electrical connector_assembly is assembled or disassembled, the_force applied on the pick up_cap and the electrical connector has to_be greater than ever, which is_prone to destroy the hooks_of the_pick up cap and the_parts of the_electrical connector._In addition, the_greater shake during the assembling the_pick up cap_on the electrical connector can make_an_open electrical connection_and_a_fail mechanical_connection between terminals_and_leads of_the_chip module.
Thus, there is a need_to_provide a new land grid connector assembly_that overcomes the above-mentioned_problems._This invention relates to_steam generators for nuclear power_plants and more particularly to such_steam generators_which utilize_recirculated liquid to preheat incoming liquid.
In a steam generator utilizing a_first heated fluid to convert a_second fluid to steam,_the pressure_of_the steam is_a_function of_the logarithmic means temperature difference (LMTD) between_the two_fluids. Thus, by increasing the LMTD,_the pressure of the_steam_can be increased.
An obvious way to_increase the LMTD is to raise_the temperature of the primary_fluid._However,_in nuclear steam generating systems,_the temperature of the primary fluid_is a limiting_factor in the design of the system_and_is normally set at a maximum_allowable_safe value.
Increasing the LMTD may also_be_accomplished_within the steam generator by_providing a preheater chamber in which_feedwater is heated to a temperature lower than the_boiling point. Examples_of steam generators which include_preheaters_can_be found in U.S. Pat. Nos. 3,804,069; 3,896,770 and 3,916,843._The increased_complexity of a_steam generator resulting from the addition of a preheater section_increases the probability of excessive corrosion, increased_sludge collection, and water hammer problems. The present invention combines the_simplicity of a recirculating steam generator with the_performance advantages of a preheat unit. 1._Field of the Invention
The_present_invention relates