Permanent seal ring for a nuclear reactor cavity

Details Permanent seal ring for a nuclear reactor cavity Permanent seal ring for a nuclear reactor cavity

1974-09-03

1979-10-09

Engle, Samuel W.

176 30, G21C 1920

Patent

active

041705173

ABSTRACT:
A nuclear reactor containment arrangement incorporating a permanent cavity to vessel seal in the form of a flexible quarter-circular annular steel gasket affixed to and extending between the reactor vessel seal plate and cavity wall. The seal functions to isolate the periphery of the vessel from a permanent water-tight compartment above the reactor vessel which is flooded during refueling operations to minimize the release of radiation upon exposure of the nuclear core. The seal is designed to accommodate both radial and axial expansion of the pressure vessel relative to the cavity wall occurring during reactor operation without breaking the water-tight integrity of the seal. The pressure vessel ventilation system is provided with an air exit duct at the reactor nozzle level to facilitate the circulation of air around the periphery of the vessel which would otherwise be restricted at the seal to vessel interface.

REFERENCES:
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patent: 2453124 (1948-11-01), Fletcher et al.
patent: 2641381 (1953-06-01), Bertrand
patent: 2805789 (1957-09-01), Kreh et al.
patent: 2821325 (1958-01-01), Chapellier et al.
patent: 2949320 (1960-08-01), Low et al.
patent: 3568379 (1971-03-01), Johnsson et al.
patent: 3578564 (1971-05-01), Fletcher
patent: 3633784 (1972-01-01), Taft
patent: 3753853 (1973-08-01), Schabert
patent: 3812008 (1974-05-01), Fryer

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