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A finding of very low safety significance … A finding of very low safety significance was self-revealed for failing to adequately inspect and identify, and then correct severe degradation of the motor operator for E4150F002 (HPCI turbine steam supply inboard containment isolation valve), which failed on July 23, 2012, when operators were attempting to place the high pressure coolant injection (HPCI) system into standby. The failure analysis of the motor identified the severe degradation. The apparent cause evaluation team identified three apparent and contributing causes for the severe degradation: first, prolonged moisture from steam leaks or other water sources; second, improper end ring coatings; and third, failing to identify a degraded condition during a video probe inspection. A finding of very low safety significance was self-revealed for failing to adequately inspect and identify, and then correct severe degradation of the motor operator for E4150F002 (HPCI turbine steam supply inboard containment isolation valve), which failed on July 23, 2012, when operators were attempting to place the high pressure coolant injection (HPCI) system into standby. The failure analysis of the motor identified the severe degradation. The apparent cause evaluation team identified three apparent and contributing causes for the severe degradation: first, prolonged moisture from steam leaks or other water sources; second, improper end ring coatings; and third, failing to identify a degraded condition during a video probe inspection. This finding has a cross-cutting aspect in the area of Problem Identification and Resolution, Corrective Action Program, appropriate corrective actions aspect because the licensee failed to adequately inspect and identify, and then correct severe degradation of the motor operator for E4150F002.ation of the motor operator for E4150F002. +

Discovered date

23:59:59, 31 December 2012 +

Docket

05000341 +

Event date

23:59:59, 31 December 2012 +

Finding integer

1 +

Finding type

Finding +

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PI.3 +

IR 05000341/2012005 +

Inspector

M Bielby +, R Morris +, Dariusz Szwarc +, James Beavers +, Brian Kemker +, Michael Jones +, Phillip Smagacz +, Jim Nance + and Rosalyn Jones +

Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.

19:05:12, 30 September 2017 +

Person