FIELD: nuclear power engineering. SUBSTANCE: fuel assembly has supporting frame provided with two tips joined together through guide tubes and lattices. Each lattice has three sets of intersecting plates confining the cells. Plates are provided with rod clamping facilities which hold these rods in assemblies of triangular regular network upper tip has bottom part with bell for transfer from hexahedral section to cylindrical connection provided with detachable intermediate plate. Top part of upper tip has cylindrical sleeve mounted for sliding over cylindrical connection and supporting plate. Tubular struts limit relative separation of intermediate and supporting plates. Spring. Springs exert pressure on plates which tends to separate them. EFFECT: improved design. 10 cl, 11 dwg
