noun
nuclear fission chain reaction
Technical term in nuclear physics; refers to a self-sustaining series of fissions where released neutrons cause further fissions.
原子炉では核分裂連鎖反応が制御されている。
In a nuclear reactor, the fission chain reaction is controlled.
核分裂連鎖反応が臨界に達すると、持続的にエネルギーが放出される。
When the fission chain reaction reaches criticality, energy is released continuously.