Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – Pressure suppression and relief
Patent
1995-03-10
1997-01-21
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
Pressure suppression and relief
376309, 376314, G21C 9008
Patent
active
055966136
ABSTRACT:
A system for suppressing the pressure inside the containment of a BWR following a postulated accident. A piping subsystem is provided which features a main process pipe that communicates the wetwell airspace to a connection point downstream of the guard charcoal bed in an offgas system and upstream of the main bank of delay charcoal beds which give extensive holdup to offgases. The main process pipe is fitted with both inboard and outboard containment isolation valves. Also incorporated in the main process pipe is a low-differential-pressure rupture disk which prevents any gas outflow in this piping whatsoever until or unless rupture occurs by virtue of pressure inside this main process pipe on the wetwell airspace side of the disk exceeding the design opening (rupture) pressure differential. The charcoal holds up the radioactive species in the noncondensable gas from the wetwell plenum by adsorption, allowing time for radioactive decay before the gas is vented to the environs.
REFERENCES:
patent: 3848067 (1974-11-01), Cooper
patent: 3963460 (1976-06-01), Stumpf et al.
patent: 5091144 (1992-02-01), Dillmann et al.
patent: 5295168 (1994-03-01), Gluntz et al.
Standard Safety Analysis Report, ABWR (no date).
Gluntz Douglas M.
Nesbitt Loyd B.
General Electric Company
McGinness James E.
Wasil Daniel D.
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