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Title: Pressure suppression containment system for boiling water reactor

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.
Inventors:
 [1];  [1]
  1. (San Jose, CA)
Issue Date:
OSTI Identifier:
870799
Assignee:
General Electric Company (San Jose, CA) OAK
Patent Number(s):
US 5596613
Contract Number:
AC03-90SF18494
Research Org:
General Electric Co
Country of Publication:
United States
Language:
English
Subject:
pressure; suppression; containment; boiling; water; reactor; suppressing; inside; bwr; following; postulated; accident; piping; subsystem; provided; features; main; process; pipe; communicates; wetwell; airspace; connection; downstream; guard; charcoal; bed; offgas; upstream; bank; delay; beds; extensive; holdup; offgases; fitted; inboard; outboard; isolation; valves; incorporated; low-differential-pressure; rupture; disk; prevents; gas; outflow; whatsoever; unless; occurs; virtue; exceeding; design; differential; holds; radioactive; species; noncondensable; plenum; adsorption; allowing; time; decay; vented; environs; pressure suppression; radioactive species; water reactor; coal bed; pressure differential; radioactive decay; boiling water; isolation valve; suppression containment; pressure inside; active species; coal beds; main process; noncondensable gas; /376/