skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of delayed link failure on probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.

Abstract

Weak link (WL)/strong link (SL) systems constitute important parts of the overall operational design of high consequence systems, with the SL system designed to permit operation of the system only under intended conditions and the WL system designed to prevent the unintended operation of the system under accident conditions. Degradation of the system under accident conditions into a state in which the WLs have not deactivated the system and the SLs have failed in the sense that they are in a configuration that could permit operation of the system is referred to as loss of assured safety. The probability of such degradation conditional on a specific set of accident conditions is referred to as probability of loss of assured safety (PLOAS). Previous work has developed computational procedures for the calculation of PLOAS under fire conditions for a system involving multiple WLs and SLs and with the assumption that a link fails instantly when it reaches its failure temperature. Extensions of these procedures are obtained for systems in which there is a temperature-dependent delay between the time at which a link reaches its failure temperature and the time at which that link actually fails.

Authors:
 [1]; ;  [2]
  1. (ProStat, Mesa, AZ)
  2. (Arizona State University, Tempe, AZ)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
910200
Report Number(s):
SAND2007-1907
TRN: US200723%%376
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ACCIDENTS; PROBABILITY; SAFETY ENGINEERING; SYSTEMS ANALYSIS; FIRES; TEMPERATURE DEPENDENCE; TIME DELAY; Statistics.; Links and link-motion.; Failure analysis.

Citation Formats

Johnson, J. D., Oberkampf, William Louis, and Helton, Jon Craig. Effect of delayed link failure on probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.. United States: N. p., 2007. Web. doi:10.2172/910200.
Johnson, J. D., Oberkampf, William Louis, & Helton, Jon Craig. Effect of delayed link failure on probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.. United States. doi:10.2172/910200.
Johnson, J. D., Oberkampf, William Louis, and Helton, Jon Craig. Tue . "Effect of delayed link failure on probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.". United States. doi:10.2172/910200. https://www.osti.gov/servlets/purl/910200.
@article{osti_910200,
title = {Effect of delayed link failure on probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.},
author = {Johnson, J. D. and Oberkampf, William Louis and Helton, Jon Craig},
abstractNote = {Weak link (WL)/strong link (SL) systems constitute important parts of the overall operational design of high consequence systems, with the SL system designed to permit operation of the system only under intended conditions and the WL system designed to prevent the unintended operation of the system under accident conditions. Degradation of the system under accident conditions into a state in which the WLs have not deactivated the system and the SLs have failed in the sense that they are in a configuration that could permit operation of the system is referred to as loss of assured safety. The probability of such degradation conditional on a specific set of accident conditions is referred to as probability of loss of assured safety (PLOAS). Previous work has developed computational procedures for the calculation of PLOAS under fire conditions for a system involving multiple WLs and SLs and with the assumption that a link fails instantly when it reaches its failure temperature. Extensions of these procedures are obtained for systems in which there is a temperature-dependent delay between the time at which a link reaches its failure temperature and the time at which that link actually fails.},
doi = {10.2172/910200},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}

Technical Report:

Save / Share: