FIELD: nuclear engineering. SUBSTANCE: process involves reduction of neutron absorber concentration in reactor core according to desired power level in the course of fuel burn-up. To this end, average temperature of primary coolant is varied depending on energy release distribution characterized by volumetric coefficient of irregularity according to definite relations. Relations include, for example, coolant heating temperature in core, reactor thermal power, and other measured, calculated, or desired variables. EFFECT: facilitated procedure. 9 cl, 1 dwg
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