reactor and will require more on-site construction, which calls into question the claimed benefits of SMRs. The firm is targeting a 500-day construction time. Electricity needs in remote locations are usually small and variable, making them suitable for a smaller plant. The smaller size may also reduce the need for a grid to distribute their output. Flexibility of SMR SMRs offer significant advantages over conventional style nuclear reactors due to the flexibility of their modular design. Flexibility in the capabilities of SMRs offers advantages, incremental load capacity, ability for adaptation to current nuclear powerplant sites, utilization for industrial applications, improved operating time, and the ability to be “grid independent”. Safety Containment is more efficient, and proliferation concerns are much less. For example, a pressure release valve may have a spring that can respond to increasing pressure to increase coolant flow. Inherent safety features require no moving parts to work, depending only on physical laws. Another example is a plug at the bottom of a reactor that melts away when temperatures are too high, allowing the reactor fuel to drain out of the reactor and lose critical mass. A report by the German Federal Office for the Safety of Nuclear Waste Management (BASE) considering 136 different historical and current reactors and SMR concepts stated: "Overall, SMRs could potentially achieve safety advantages compared to power plants with a larger power output, as they have a lower radioactive inventory per reactor and aim for a higher safety level especially through simplifications and an increased use of passive systems. In contrast, however, various SMR concepts also favour reduced regulatory requirements, for example, with regard to the required degree of redundancy or diversity in safety systems. Some developers even demand that current requirements be waived, for example in the area of internal accident management or with reduced planning zones, or even a complete waiver of external emergency protection planning. Since the safety of a reactor plant depends on all of these factors, based on the current state of knowledge it is not possible to state, that a higher safety level is achieved by SMR concepts in principle." Proliferation Many SMRs are designed to use unconventional fuels that allow for higher burnup and longer fuel cycles. Longer refueling intervals can decrease proliferation risks and lower chances of radiation escaping containment. For reactors in remote areas, accessibility can be troublesome, so longer fuel life can be helpful.