FIELD: physics, nuclear physics.
SUBSTANCE: invention relates to atomic energetic and is meant for use in pressurised water reactors. Fuel assembly contains micro-fuel-elements, perforated collectors for the supply of the coolant, guide tubes for the regulating rods, shank and head. Micro-fuel-elements are placed in a perforated steel case. Guide tubes are longitudinally mounted inside the case. Collectors for the supply of the coolant and tubes for the regulating rods are made from a zirconium alloy. The case is made mobile in a longitudinal direction relative to the head.
EFFECT: increase in the burnup fraction of micro-fuel-elements by reducing the amount of steel in the fuel assembly.
2 cl, 2 dwg
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