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Title: Enhanced Component Performance Study: Air-Operated Valves 1998–2013

This report presents a performance evaluation of air-operated valves (AOVs) at U.S. commercial nuclear power plants. The data used in this study are based on the operating experience failure reports from fiscal year 1998 through 2013 for the component reliability as reported in the Institute of Nuclear Power Operations (INPO) Consolidated Events Database (ICES). The AOV failure modes considered are failure-to-open/close, failure to operate or control, and spurious operation. The component reliability estimates and the reliability data are trended for the most recent 10-year period, while yearly estimates for reliability are provided for the entire active period. No statistically significant increasing or decreasing trends were identified in the AOV failure data.
Authors:
 [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States). Risk Assessment and Management Services Dept.
Publication Date:
OSTI Identifier:
1261715
Report Number(s):
INL/EXT--15-34433
TRN: US1601589
DOE Contract Number:
AC07-05ID14517; NRC-HQ-14-D-0018
Resource Type:
Technical Report
Research Org:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org:
USDOE; US Nuclear Regulatory Commission (NRC)
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; VALVES; AIR; FAILURES; NUCLEAR POWER PLANTS; RELIABILITY; PERFORMANCE; EVALUATION; OPERATION air-operated valve; component performance; operating experience