Question

Decide whether each of the following statements are T-True, or F-False. (If the first is T and the rest are F, enter TFFFF) A) As estimated by NUREG-1150, the probability for a nuclear reactor to release a significant amount of radioactivity is greater than 1 in 500 per reactor year B) A pen that has a mass of 15 grams has an equivalent mass energy of 3E5 kWh C) The fission probability for U-235 generally increases as neutron energy increases. D) Critical mass refers to the maximum amount of energy a fissionable material can release. E) The main reason for going to plutonium breeder reactors is to extend the useful lifetime of our uranium reserves Be careful to input your answer as a string of "T's and F's", in order.

Answer 1

A) F

B) F - Using E=mc²

C) T -  high-energy neutrons are travelling too quickly to have much interaction with the nuclei in the fuel.

D) T -  When a nuclear chain reaction in a mass of fissile material is self-sustaining, the mass is said to be in a critical state in which there is no increase or decrease in power, temperature, or neutron population.

E) T - It was expected that uranium would be scarce and high-grade deposits would quickly become depleted if fission power were deployed on a large scale, But in reality since the end of the cold war, uranium has been much cheaper and more abundant than early designers expected.