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Question
For the fast chain reaction, the size of U235 block, as compared to its critical size, must be
For the fast chain reaction, the size of U235 block, as compared to its critical size, must be
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Solution
The correct option is A greater
The critical size must at least include enough fissionable material to reach critical mass. If the size of the reactor core is less than a certain minimum, fission neutrons escape through its surface and the chain reaction is not sustained.
The critical size must at least include enough fissionable material to reach critical mass. If the size of the reactor core is less than a certain minimum, fission neutrons escape through its surface and the chain reaction is not sustained.
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