FIELD: nuclear reactors. SUBSTANCE: control column has its absorber coupled with head of fuel element and its area between lower edge of absorbing bodies held in absorber and upper edge of fuel contained in fuel rods of fuel element has absorbing material passed through actually entire coupling element. To this end, fuel element is provided with absorbing pins passed through cover plate of fuel element and allowed to enter intermediate space between fuel rods. Absorber related to it has hollow cylinder surrounded with coupling element. This prevents power distortions in fuel rods that may occur during reactor operation in case zone free from fuel element fuel and from any body of absorber abuts against upper edge. EFFECT: improved operating reliability of reactor. 8 cl, 3 dwg
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