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Title: Self-actuating and locking control for nuclear reactor

Abstract

A self-actuating, self-locking flow cutoff valve particularly suited for use in a nuclear reactor of the type which utilizes a plurality of fluid support neutron absorber elements to provide for the safe shutdown of the reactor. The valve comprises a substantially vertical elongated housing and an aperture plate located in the housing for the flow of fluid therethrough, a substantially vertical elongated nozzle member located in the housing and affixed to the housing with an opening in the bottom for receiving fluid and apertures adjacent a top end for discharging fluid. The nozzle further includes two sealing means, one located above and the other below the apertures. Also located in the housing and having walls surrounding the nozzle is a flow cutoff sleeve having a fluid opening adjacent an upper end of the sleeve, the sleeve being moveable between an upper open position wherein the nozzle apertures are substantially unobstructed and a closed position wherein the sleeve and nozzle sealing surfaces are mated such that the flow of fluid through the apertures is obstructed. It is a particular feature of the present invention that the valve further includes a means for utilizing any increase in fluid pressure to maintain themore » cutoff sleeve in a closed position. It is another feature of the invention that there is provided a means for automatically closing the valve whenever the flow of fluid drops below a predetermined level.« less

Inventors:
 [1]
  1. (Chatsworth, CA)
Issue Date:
Research Org.:
Atomics International Div., Canoga Park, CA (USA)
OSTI Identifier:
864121
Patent Number(s):
4313794
Assignee:
Rockwell International Corporation (El Segundo, CA) OSTI
DOE Contract Number:  
EY-76-C-03-0824
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
self-actuating; locking; control; nuclear; reactor; self-locking; flow; cutoff; valve; particularly; suited; type; utilizes; plurality; fluid; support; neutron; absorber; elements; provide; safe; shutdown; comprises; substantially; vertical; elongated; housing; aperture; plate; located; therethrough; nozzle; affixed; bottom; receiving; apertures; adjacent; top; discharging; sealing; means; below; walls; surrounding; sleeve; upper; moveable; position; unobstructed; closed; surfaces; mated; obstructed; particular; feature; utilizing; increase; pressure; maintain; provided; automatically; closing; whenever; drops; predetermined; level; substantially vertical; aperture plate; valve comprises; sealing means; neutron absorber; particularly suited; nuclear reactor; closed position; fluid pressure; predetermined level; sealing surface; sealing surfaces; vertical elongated; drops below; nozzle seal; fluid therethrough; absorber element; apertures adjacent; automatically closing; /376/137/251/976/

Citation Formats

Chung, Dong K. Self-actuating and locking control for nuclear reactor. United States: N. p., 1982. Web.
Chung, Dong K. Self-actuating and locking control for nuclear reactor. United States.
Chung, Dong K. Fri . "Self-actuating and locking control for nuclear reactor". United States. https://www.osti.gov/servlets/purl/864121.
@article{osti_864121,
title = {Self-actuating and locking control for nuclear reactor},
author = {Chung, Dong K.},
abstractNote = {A self-actuating, self-locking flow cutoff valve particularly suited for use in a nuclear reactor of the type which utilizes a plurality of fluid support neutron absorber elements to provide for the safe shutdown of the reactor. The valve comprises a substantially vertical elongated housing and an aperture plate located in the housing for the flow of fluid therethrough, a substantially vertical elongated nozzle member located in the housing and affixed to the housing with an opening in the bottom for receiving fluid and apertures adjacent a top end for discharging fluid. The nozzle further includes two sealing means, one located above and the other below the apertures. Also located in the housing and having walls surrounding the nozzle is a flow cutoff sleeve having a fluid opening adjacent an upper end of the sleeve, the sleeve being moveable between an upper open position wherein the nozzle apertures are substantially unobstructed and a closed position wherein the sleeve and nozzle sealing surfaces are mated such that the flow of fluid through the apertures is obstructed. It is a particular feature of the present invention that the valve further includes a means for utilizing any increase in fluid pressure to maintain the cutoff sleeve in a closed position. It is another feature of the invention that there is provided a means for automatically closing the valve whenever the flow of fluid drops below a predetermined level.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

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