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Title: SCDAP/RELAP5 lower core plate model

Abstract

The SCDAP/RELAP5 computer code is a best-estimate analysis tool for performing nuclear reactor severe accident simulations. This report describes the justification, theory, implementation, and testing of a new modeling capability which will refine the analysis of the movement of molten material from the core region to the vessel lower head. As molten material moves from the core region through the core support structures it may encounter conditions which will cause it to freeze in the region of the lower core plate, delaying its arrival to the vessel head. The timing of this arrival is significant to reactor safety, because during the time span for material relocation to the lower head, the core may be experiencing steam-limited oxidation. The time at which hot material arrives in a coolant-filled lower vessel head, thereby significantly increasing the steam flow rate through the core region, becomes significant to the progression and timing of a severe accident. This report is a revision of a report INEEL/EXT-00707, entitled ``Preliminary Design Report for SCDAP/RELAP5 Lower Core Plate Model''.

Authors:
;
Publication Date:
Research Org.:
Idaho National Engineering and Environmental Lab., Idaho Falls, ID (US)
Sponsoring Org.:
N/A (US)
OSTI Identifier:
752005
Report Number(s):
INEEL/EXT-99-01029
TRN: US0001144
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
22 NUCLEAR REACTOR TECHNOLOGY; 99 MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; S CODES; R CODES; REACTOR ACCIDENTS; MATHEMATICAL MODELS; CORIUM; SUPPORTS; OXIDATION; REACTOR SAFETY; REACTOR CORES; MASS TRANSFER; SCDAP/RELAP5; NUCLEAR REACTOR; ACCIDENT SIMULATIONS; MOLTEN MATERIAL; CORE REGION; VESSEL LOWER HEAD; CORE SUPPORT STRUCTURES

Citation Formats

Coryell, E.W., and Griffin, F.P. SCDAP/RELAP5 lower core plate model. United States: N. p., 1999. Web. doi:10.2172/752005.
Coryell, E.W., & Griffin, F.P. SCDAP/RELAP5 lower core plate model. United States. doi:10.2172/752005.
Coryell, E.W., and Griffin, F.P. Wed . "SCDAP/RELAP5 lower core plate model". United States. doi:10.2172/752005. https://www.osti.gov/servlets/purl/752005.
@article{osti_752005,
title = {SCDAP/RELAP5 lower core plate model},
author = {Coryell, E.W. and Griffin, F.P.},
abstractNote = {The SCDAP/RELAP5 computer code is a best-estimate analysis tool for performing nuclear reactor severe accident simulations. This report describes the justification, theory, implementation, and testing of a new modeling capability which will refine the analysis of the movement of molten material from the core region to the vessel lower head. As molten material moves from the core region through the core support structures it may encounter conditions which will cause it to freeze in the region of the lower core plate, delaying its arrival to the vessel head. The timing of this arrival is significant to reactor safety, because during the time span for material relocation to the lower head, the core may be experiencing steam-limited oxidation. The time at which hot material arrives in a coolant-filled lower vessel head, thereby significantly increasing the steam flow rate through the core region, becomes significant to the progression and timing of a severe accident. This report is a revision of a report INEEL/EXT-00707, entitled ``Preliminary Design Report for SCDAP/RELAP5 Lower Core Plate Model''.},
doi = {10.2172/752005},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}