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Title: Analysis of a passive ex-vessel core retention device during a postulated core melt event

Abstract

An assessment has been carried out on the penetration of a molten core into a passive ex-vessel retention device (constructed from MgO). The MELSAC computer code has been developed to model molten UO/sub 2/ penetrating MgO. The model also accounts for the feedback effect of heating-up surrounding structures. The sensitivity of MgO penetration and heating-up of structures to a range of MELSAC input variables was evaluated. The scoping study indicated that the amount of heat that can be rejected to structures above the pool tends to control the penetration of MgO. The installation of a core retention device greatly increases the time at which a molten core would be released from containment. However, structures in the reactor cavity would have to be protected to prevent damage by thermal radiation from the pool surface.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (USA)
OSTI Identifier:
6409732
Report Number(s):
BNL-NUREG-27594; CONF-800403-44
ON: TI85003570
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Conference
Resource Relation:
Conference: ANS thermal reactor safety meeting, Knoxville, TN, USA, 8 Apr 1980
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; CORE CATCHERS; CORIUM; PWR TYPE REACTORS; MELTDOWN; MAGNESIUM OXIDES; ACCIDENTS; ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; MAGNESIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REACTOR ACCIDENTS; REACTOR COMPONENTS; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 220900* - Nuclear Reactor Technology- Reactor Safety; 210200 - Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled

Citation Formats

Pratt, W T, and Gasser, R D. Analysis of a passive ex-vessel core retention device during a postulated core melt event. United States: N. p., 1980. Web.
Pratt, W T, & Gasser, R D. Analysis of a passive ex-vessel core retention device during a postulated core melt event. United States.
Pratt, W T, and Gasser, R D. Tue . "Analysis of a passive ex-vessel core retention device during a postulated core melt event". United States. https://www.osti.gov/servlets/purl/6409732.
@article{osti_6409732,
title = {Analysis of a passive ex-vessel core retention device during a postulated core melt event},
author = {Pratt, W T and Gasser, R D},
abstractNote = {An assessment has been carried out on the penetration of a molten core into a passive ex-vessel retention device (constructed from MgO). The MELSAC computer code has been developed to model molten UO/sub 2/ penetrating MgO. The model also accounts for the feedback effect of heating-up surrounding structures. The sensitivity of MgO penetration and heating-up of structures to a range of MELSAC input variables was evaluated. The scoping study indicated that the amount of heat that can be rejected to structures above the pool tends to control the penetration of MgO. The installation of a core retention device greatly increases the time at which a molten core would be released from containment. However, structures in the reactor cavity would have to be protected to prevent damage by thermal radiation from the pool surface.},
doi = {},
url = {https://www.osti.gov/biblio/6409732}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Conference:
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