Enriched uranium fueled fast breeder reactors can contain up to a maximum of ____________ percent U-235 fissile content?
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Answer: D. 85
Explanation
Fast breeder reactors can utilize highly enriched fuel containing up to approximately eighty-five percent fissile content. High fissile concentrations are sometimes used in specialized fast reactor cores to sustain fast neutron chain reactions. The eighty-five percent threshold represents the upper bound for certain advanced fast spectrum reactor fuel designs. Fast breeder reactors are designed to produce more fissile material than they consume during operation. Unlike thermal reactors, fast reactors do not use moderators to slow down neutrons, utilizing high-energy neutrons instead. Fuel for these reactors often includes mixed oxides of plutonium and uranium to achieve optimal neutronic performance.
Fifteen percent is too low for the maximum fissile limit specified for these specialized fast breeder reactor cores. Forty-five percent represents an intermediate enrichment level typical of some research reactors rather than the maximum. Sixty-five percent is below the maximum possible fissile concentration achieved in high-performance fast reactor fuel designs.
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- Engineering
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- Chemical Engineering
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- medium
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