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Title: Heat barrier for use in a nuclear reactor facility

Abstract

A thermal barrier for use in a nuclear reactor facility is disclosed herein. Generally, the thermal barrier comprises a flexible, heat-resistant web mounted over the annular space between the reactor vessel and the guard vessel in order to prevent convection currents generated in the nitrogen atmosphere in this space from entering the relatively cooler atmosphere of the reactor cavity which surrounds these vessels. Preferably, the flexible web includes a blanket of heat-insulating material formed from fibers of a refractory material, such as alumina and silica, sandwiched between a heat-resistant, metallic cloth made from stainless steel wire. In use, the web is mounted between the upper edges of the guard vessel and the flange of a sealing ring which surrounds the reactor vessel with a sufficient enough slack to avoid being pulled taut as a result of thermal differential expansion between the two vessels. The flexible web replaces the rigid and relatively complicated structures employed in the prior art for insulating the reactor cavity from the convection currents generated between the reactor vessel and the guard vessel.

Inventors:
 [1]
  1. (South Huntingdon Twp., Westmoreland County, PA)
Issue Date:
Research Org.:
WESTINGHOUSE ELECTRIC CORP
OSTI Identifier:
866766
Patent Number(s):
4783310
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:  
AC15-76CL02395
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
heat; barrier; nuclear; reactor; facility; thermal; disclosed; comprises; flexible; heat-resistant; web; mounted; annular; space; vessel; guard; prevent; convection; currents; generated; nitrogen; atmosphere; entering; relatively; cooler; cavity; surrounds; vessels; preferably; blanket; heat-insulating; material; formed; fibers; refractory; alumina; silica; sandwiched; metallic; cloth; stainless; steel; wire; upper; edges; flange; sealing; sufficient; slack; avoid; pulled; taut; result; differential; expansion; replaces; rigid; complicated; structures; employed; prior; insulating; reactor cavity; refractory material; thermal barrier; insulating material; reactor vessel; nuclear reactor; stainless steel; annular space; guard vessel; differential expansion; nitrogen atmosphere; steel wire; upper edges; relatively cool; material formed; reactor facility; upper edge; barrier comprises; /376/250/976/

Citation Formats

Keegan, Charles P. Heat barrier for use in a nuclear reactor facility. United States: N. p., 1988. Web.
Keegan, Charles P. Heat barrier for use in a nuclear reactor facility. United States.
Keegan, Charles P. Fri . "Heat barrier for use in a nuclear reactor facility". United States. https://www.osti.gov/servlets/purl/866766.
@article{osti_866766,
title = {Heat barrier for use in a nuclear reactor facility},
author = {Keegan, Charles P.},
abstractNote = {A thermal barrier for use in a nuclear reactor facility is disclosed herein. Generally, the thermal barrier comprises a flexible, heat-resistant web mounted over the annular space between the reactor vessel and the guard vessel in order to prevent convection currents generated in the nitrogen atmosphere in this space from entering the relatively cooler atmosphere of the reactor cavity which surrounds these vessels. Preferably, the flexible web includes a blanket of heat-insulating material formed from fibers of a refractory material, such as alumina and silica, sandwiched between a heat-resistant, metallic cloth made from stainless steel wire. In use, the web is mounted between the upper edges of the guard vessel and the flange of a sealing ring which surrounds the reactor vessel with a sufficient enough slack to avoid being pulled taut as a result of thermal differential expansion between the two vessels. The flexible web replaces the rigid and relatively complicated structures employed in the prior art for insulating the reactor cavity from the convection currents generated between the reactor vessel and the guard vessel.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

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