FIELD: nuclear power engineering. SUBSTANCE: nuclear reactor element with elongated element box of regular-polygon section has on one end element tail part carrying central body inside element box surrounded by active material sleeve 6 displaced inside element in longitudinal direction. Lead-in 8 is placed in sleeve 6 at sectional area corner of element box providing easy access for refueling machine to remove sleeves 6 from element box. EFFECT: facilitated refueling of reactor. 2 cl, 2 dwg
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