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Title: Pressure suppression system

Abstract

A pressure suppression system includes a containment vessel surrounding a reactor pressure vessel and defining a drywell therein containing a non-condensable gas. An enclosed wetwell pool is disposed inside the containment vessel, and an enclosed gravity driven cooling system (GDCS) pool is disposed above the wetwell pool in the containment vessel. The GDCS pool includes a plenum for receiving through an inlet the non-condensable gas carried with steam from the drywell following a loss-of-coolant accident (LOCA). A condenser is disposed in the GDCS plenum for condensing the steam channeled therein and to trap the non-condensable gas therein. A method of operation includes draining the GDCS pool following the LOCA and channeling steam released into the drywell following the LOCA into the GDCS plenum for cooling along with the non-condensable gas carried therewith for trapping the gas therein.

Inventors:
 [1]
  1. (San Jose, CA)
Publication Date:
Research Org.:
General Electric Co
OSTI Identifier:
869534
Patent Number(s):
US 5353318
Assignee:
General Electric Company (San Jose, CA) OAK
DOE Contract Number:
AC03-90SF18494
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pressure; suppression; containment; vessel; surrounding; reactor; defining; drywell; therein; containing; non-condensable; gas; enclosed; wetwell; pool; disposed; inside; gravity; driven; cooling; gdcs; plenum; receiving; inlet; carried; steam; following; loss-of-coolant; accident; loca; condenser; condensing; channeled; trap; method; operation; draining; channeling; released; therewith; trapping; gdcs pool; pressure suppression; wetwell pool; reactor pressure; containment vessel; pressure vessel; disposed inside; non-condensable gas; therein containing; steam released; gas therein; vessel surrounding; gravity driven; carried therewith; enclosed wetwell; driven cooling; drywell therein; coolant accident; /376/

Citation Formats

Gluntz, Douglas M. Pressure suppression system. United States: N. p., 1994. Web.
Gluntz, Douglas M. Pressure suppression system. United States.
Gluntz, Douglas M. 1994. "Pressure suppression system". United States. doi:. https://www.osti.gov/servlets/purl/869534.
@article{osti_869534,
title = {Pressure suppression system},
author = {Gluntz, Douglas M.},
abstractNote = {A pressure suppression system includes a containment vessel surrounding a reactor pressure vessel and defining a drywell therein containing a non-condensable gas. An enclosed wetwell pool is disposed inside the containment vessel, and an enclosed gravity driven cooling system (GDCS) pool is disposed above the wetwell pool in the containment vessel. The GDCS pool includes a plenum for receiving through an inlet the non-condensable gas carried with steam from the drywell following a loss-of-coolant accident (LOCA). A condenser is disposed in the GDCS plenum for condensing the steam channeled therein and to trap the non-condensable gas therein. A method of operation includes draining the GDCS pool following the LOCA and channeling steam released into the drywell following the LOCA into the GDCS plenum for cooling along with the non-condensable gas carried therewith for trapping the gas therein.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1994,
month = 1
}

Patent:

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  • A system is disclosed 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 untilmore » 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. 3 figs.« less
  • A pressure suppression containment system includes a containment vessel surrounding a reactor pressure vessel and defining a drywell therein containing a non-condensable gas. An enclosed wetwell pool is disposed inside the containment vessel, and a gravity driven cooling system (GDCS) pool is disposed above the wetwell pool in the containment vessel. The wetwell pool includes a plenum for receiving the non-condensable gas carried with steam from the drywell following a loss-of coolant-accident (LOCA). The wetwell plenum is vented to a plenum above the GDCS pool following the LOCA for suppressing pressure rise within the containment vessel. A method of operationmore » includes channeling steam released into the drywell following the LOCA into the wetwell pool for cooling along with the non-condensable gas carried therewith. The GDCS pool is then drained by gravity, and the wetwell plenum is vented into the GDCS plenum for channeling the non-condensable gas thereto.« less
  • 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 unlessmore » 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.« less
  • A pressure suppression system for a safety vessel is described. It consists of a pressure enclosure of steel or concrete for a liquid-cooled nuclear reactor with a condensation chamber with toroidal floor (flooring, platform, ceiling) in the form of a circular cylinder in the interior of which parallel to the axis, not filling the entire cylinder, is found the pressure reservoir with a biological shield. The upper toroidal platform is crossed by the condensation pipes reaching the water, characterized by the following combination of characteristics: for the protection of walls subjected to pressure, a concrete casing is provided; the toroidalmore » platforms are provided with pressure crossbeams; and the lower part of the condensation tubes is provided with a mooring where the sheet metal baffle plates are fastened. (TSS)« less