Analyzing non-piping location-specific LOCA frequency for risk-informed resolution of generic safety issue 191

Nicholas O'Shea, Zahra Mohaghegh, Seyed A. Reihani, Ernie Kee, Karl Fleming, Bengt Lydell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The NRC performed an expert elicitation study, NUREG-1829, to develop generic loss-of-coolant accident (LOCA) frequencies. In support of the Risk-Informed Resolution of Generic Safety Issue 191 (GSI-191), Fleming and Lydell (2011) developed location-specific LOCA frequencies, utilizing NUREG-1829 and service data. Their study considered the inclusion of spatial variation in LOCA frequency estimations; however, this was limited to piping and welded reactor coolant system (RCS) components. This paper presents the status of on-going research which investigates the contribution of non-piping RCS components to a location-specific LOCA and follows these steps: Step (1) Searching for evidence: an extensive review of academic, industry, and regulatory publications is performed and, based on the following, the results are reported: (a) LOCA relevancy, i.e., the potential for the failure of each component to result in a LOCA and (b) Debris generation relevancy, i.e., the potential for the failure of a component to result in the generation of debris. Step (2) Screening by experts: the results of Step 1 are evaluated by experts from academia and industry to investigate the significance of the non-piping components to GSI-191. This paper reports on the initial stage of an academiaindustry collaboration to advance data analytics for location-specific LOCA frequency estimations.

Original languageEnglish (US)
Title of host publicationInternational Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015
PublisherAmerican Nuclear Society
Pages499-508
Number of pages10
ISBN (Electronic)9781510808119
StatePublished - Jan 1 2015
Event2015 International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015 - Sun Valley, United States
Duration: Apr 26 2015Apr 30 2015

Publication series

NameInternational Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015
Volume1

Other

Other2015 International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015
CountryUnited States
CitySun Valley
Period4/26/154/30/15

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ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Nuclear Energy and Engineering
  • Statistics and Probability
  • Safety, Risk, Reliability and Quality

Cite this

O'Shea, N., Mohaghegh, Z., Reihani, S. A., Kee, E., Fleming, K., & Lydell, B. (2015). Analyzing non-piping location-specific LOCA frequency for risk-informed resolution of generic safety issue 191. In International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015 (pp. 499-508). (International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015; Vol. 1). American Nuclear Society.