FIELD: physics, atomic power.
SUBSTANCE: present invention relates to a method of ensuring subcriticality of a reactor core in uncertainty conditions. The present method comprises taking physical measurements of core subcriticality after assembling the core and comparing the obtained characteristics with design values, after which adjustable reactivity rods are installed in the reactor at the level of the fuel portion of the core if there is a mismatch between values of the obtained characteristics and design values. Enrichment of the adjustable reactivity rods with the boron isotope B-10 is selected to be higher than enrichment of shim rods with the B-10 isotope.
EFFECT: optimising operating conditions of absorbing elements of the shim rod group, including avoiding the need to increase their movement and simple technique of monitoring during production, as well as a simple algorithm for safe reactor control.
5 cl, 1 dwg
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