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- BES-5 abstract "BES-5 is an acronym for a Russian thermo-electric generator design in which the heat source is a U 235 fast fission nuclear reactor.Usually radioisotope thermal generators use Pu 238 as a heat source because it has the lowest shielding requirements. Nonetheless, its decay over time makes it inappropriate for use in deep-space exploration applications, where spaceships need to travel for decades.The FNR activates just when the critical mass is attained. Then, using a mechanical control system, the reactor can be dormant for centuries and, when necessary, re-activated.The design of a FNR is similar to an atomic bomb where there is a sub-critical mass (≈90% of the critical mass) where it is inserted a rod of fissile material.[citation needed]The fission of 2.6 kg of U 235 (5% of the critical mass) is able to produce a constant output of 28 kW for 250 years (2 kW of electricity). Although the thermal output of a 52 kg mass of Pu238 would be identical it would decline through time and, after 250 years would be reduced to 4 kW due to its half-life of 87.7 years.[citation needed]".
- BES-5 wikiPageID "36799534".
- BES-5 wikiPageRevisionID "585984109".
- BES-5 hasPhotoCollection BES-5.
- BES-5 subject Category:Nuclear_technology.
- BES-5 comment "BES-5 is an acronym for a Russian thermo-electric generator design in which the heat source is a U 235 fast fission nuclear reactor.Usually radioisotope thermal generators use Pu 238 as a heat source because it has the lowest shielding requirements. Nonetheless, its decay over time makes it inappropriate for use in deep-space exploration applications, where spaceships need to travel for decades.The FNR activates just when the critical mass is attained.".
- BES-5 label "BES-5".
- BES-5 sameAs m.0ll45s7.
- BES-5 sameAs Q28119.
- BES-5 sameAs Q28119.
- BES-5 wasDerivedFrom BES-5?oldid=585984109.
- BES-5 isPrimaryTopicOf BES-5.