Full Title: ICDE Project Report: Lessons Learnt from Common-Cause Failures of Motor-Operated Valves
Author(s): Nuclear Energy Agency
Publisher(s): Nuclear Energy Agency
Publication Date: April 7, 2025
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Description (excerpt):
This report presents a study performed on a set of common cause failure (CCF) events of motor operated valves (MOV) within the International Common Cause Failure Data Exchange (ICDE) project. In July 2001, the ICDE project published a report summarising the collection and analysis of 87 MOV CCF events. Since that time, the ICDE project has continued to collect MOV events, with the database now including 172 events, spanning a period from 1980 through 2017. It was therefore decided to update the report.
The report is mainly intended for designers, operators and regulators to provide insights into the types of failure mechanisms and causes of MOV events in the ICDE database. These insights can improve the understanding of failure mechanisms and phenomena involved and their relationship to the CCF root cause.