Question

Fission reactions can get out of control without what taking place?
A.
chain reaction
B.
critical mass
C.
neutron heating
D.
neutron moderation
E.
subcritical mass

Answer 1

Fission reactions can get out of control without **B. critical mass** taking place. Critical mass is the minimum amount of fissile material needed to maintain a sustained nuclear chain reaction. If the mass is below this threshold (subcritical mass), the reaction will not sustain itself.