Device for holding gas-cooled fuel assemblies of nuclear reactor

Details Device for holding gas-cooled fuel assemblies of nuclear reactor Device for holding gas-cooled fuel assemblies of nuclear reactor

1980-03-17

1981-11-03

Cangialosi, Sal

Induced nuclear reactions: processes, systems, and elements

Reactor structures

Circulating fluid within reactor

376203, 376352, G21C 312

Patent

active

042984327

ABSTRACT:
Device for holding jacketed fuel assemblies of a gas-cooled nuclear reactor in a grid plate disposed beneath a reactor core and formed with cylindrical bores for receiving therein a respective fuel-assembly foot which serves simultaneously as a coolant inlet, including a tubular grid-plate insert member connected respectively to each of the bores for hydraulically holding down the respective fuel assemblies against flow pressure of the coolant, the insert member being closed at the bottom thereof and having at least one lateral opening for passage of coolant to the respective fuel-assembly foot, piston rings peripherally disposed on the fuel-assembly foot above and below the lateral opening for sealing the foot with respect to the inner surface of the insert member, a plurality of wedge-like structural members uniformly distributed about the periphery of the fuel-assembly foot above the lower of the piston rings, and a piston central to the foot and actuatable by a pressure difference of the coolant between an inlet thereof to and an outlet thereof from the respective fuel element, together with a conical yet non-sealing seat of the fuel assembly formed on an upper side of the grid plate, for effecting play-free clamping of the fuel assembly.

REFERENCES:
patent: 3549493 (1970-12-01), Germer
patent: 3736226 (1973-05-01), Sakurama
patent: 3873419 (1975-03-01), Sletten
patent: 3964969 (1976-06-01), Brynsvold et al.
patent: 4016035 (1977-04-01), Gallet et al.
patent: 4053354 (1977-10-01), Rennell et al.
patent: 4164443 (1979-08-01), Gibbons et al.

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