Heat-retarding closure system for pressure relief openings of pa

Details Heat-retarding closure system for pressure relief openings of pa Heat-retarding closure system for pressure relief openings of pa

1981-01-22

1985-01-22

Schafer, Richard E.

Induced nuclear reactions: processes, systems, and elements

Reactor protection or damage prevention

Pressure suppression and relief

376287, 376292, 376461, 137 68R, 220203, G21C 1108

Patent

active

044951477

ABSTRACT:
Heat retarding closure system for partitions having pressure relief openings formed therein especially in nuclear reactor buildings where main coolant nozzles of a reactor pressure vessel penetrate a biological shield, including lightweight construction closure elements having a side facing the reactor and anchors for holding the closure elements, the closure elements being pushable out of the anchors by an overpressure in a given pressure difference direction on the reactor side, and an outer sealing blowout skin, the closure elements being in the form of heat-retarding cassette inserts having a front surface with a peripheral shearing edge formed thereon resting against the blowout skin, and the blowout skin having a given thickness in the given pressure difference direction enabling the cassette insert to shear off the blowout skin and be pushed out of the anchors when a given pressure difference is at least reached.

REFERENCES:
patent: 3742968 (1973-07-01), Kennedy
patent: 3994776 (1976-11-01), Keller
patent: 4064003 (1977-12-01), Newton
patent: 4258521 (1981-03-01), Fricker et al.
patent: 4278181 (1981-07-01), Wood et al.
patent: 4292134 (1981-09-01), Eriksson

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