Induced nuclear reactions: processes – systems – and elements – Reactor structures – Circulating fluid within reactor
Patent
1983-12-21
1986-10-07
Bentley, Stephen C.
Induced nuclear reactions: processes, systems, and elements
Reactor structures
Circulating fluid within reactor
376446, G21C 332
Patent
active
046158626
ABSTRACT:
A nuclear reactor in which the bottom nozzle of each fuel assembly is a casting having leg-like pins which are cast as part of the bottom nozzle. The pins extend from the corners of the bottom nozzle of each fuel assembly. The transverse cross section of each pin has the shape of a circular sector whose arc depends on the number of apeces of the bottom nozzle, typically 90.degree. for a square nozzle and 120.degree. for a hexagonal nozzle. The fuel assemblies are mutually nested side-by-side so that a group of contiguous pins extends from each region where corners of fuel elements converge. The sides of the pins of each group are in engagement so that the pins of the group form a continuous circularly cylindrical surface. The core support plate has a plurality of holes. The boundaries of the holes are circular cylinders. Each group of pins extend into a hole in the core support plate. The holes and the pins are so dimensioned that the cylindrical body formed by each group of pins is a snug sliding fit in the corresponding hole. The fuel assemblies are thus effectively positioned, supported and aligned.
REFERENCES:
patent: 2780596 (1957-02-01), Anderson
patent: 3971575 (1976-07-01), Lesham et al.
patent: 4344914 (1982-08-01), Rosa
Roberts, E. et al., "Westinghouse PWR Fuel Development and Performance", Nuclear Energy, vol. 19, No. 5, (Oct.), 335-346.
Abeles Daniel C.
Bentley Stephen C.
Maples, Jr. John S.
Westinghouse Electric Corp.
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