Abstract
1. The algorithm for the integration of the reactor kinetics equations, based on Gear's numerical methods, provides an efficient means of calculating critical-assembly accidents, in which the assembly rapidly goes into prompt-neutron supercriticality and then slowly cools down. 2. The maximum temperature in the assembly zones, and the energy released during the burst, are not appreciably affected by the positive reactivity insertion rate. 3. Accident damage is significantly reduced (the assembly remains operational) only in cases of rapid scram-rod dumping (≤0.3 sec delay), provided the temperature coefficient of reactivity equals or exceeds the rated value.
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