TY - GEN
T1 - Analyzing non-piping location-specific LOCA frequency for risk-informed resolution of generic safety issue 191
AU - O'Shea, Nicholas
AU - Mohaghegh, Zahra
AU - Reihani, Seyed A.
AU - Kee, Ernie
AU - Fleming, Karl
AU - Lydell, Bengt
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84945130295
T3 - International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015
SP - 499
EP - 508
BT - International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015
PB - American Nuclear Society
T2 - 2015 International Topical Meeting on Probabilistic Safety Assessment and Analysis, PSA 2015
Y2 - 26 April 2015 through 30 April 2015
ER -