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Pressure suppression containment system for boiling water reactor

United States Patent

*** EXPIRED ***
January 21, 1997
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
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.
Gluntz; Douglas M. (San Jose, CA), Nesbitt; Loyd B. (San Jose, CA)
General Electric Company (San Jose, CA)
08/ 402,458
March 10, 1995
The Government of the United States of America has rights in this invention in accordance with Contract No. DE-AC03-90SF18494 awarded by the Department of Energy.