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The team identified an unresolved item rel … The team identified an unresolved item related to the licensees breaker maintenance and troubleshooting programs for safety-related and safety-significant circuit breakers. The charter tasked the team with inspecting the issues associated with Magne Blast breaker problems that occurred during and after the December 25, 2014, scram. The NRC team determined that breaker maintenance and troubleshooting practices extended beyond the Magne Blast breakers. The team identified that there were potential issues with safety-related Master Pact breakers and determined that maintenance procedures used to ensure that 4160 V and 13.8 kV safety-related and safety-significant breakers were being maintained and overhauled in a timely manner may not conform to industry recommended standards. The team identified that the licensees maintenance programs for Division I, II, III, and non-safety 4160 V and 13.8 kV breakers installed in the plant may not meet the standards recommended by the vendor, corporate, or Electric Power Research Institute (EPRI) guidelines. The licensees programs were based on EPRI documents TR-106857-V2 and TR-106857-V3, which were preventive maintenance program bases for low and medium voltage switchgear. However, the licensee appeared to only implement portions of the recommended maintenance program, and were not able to provide the team with engineering analyses or technical bases to justify the changes. The EPRI guidance was developed specifically for Magne Blast breakers based on industry operating experience, NRC Information Notices, and General Electric SILs/SALs. The NRC team was concerned that the licensee may not have performed the entire vendor or EPRI recommended tests, inspections, and refurbishments on the breakers since they were installed. The aggregate impact of missing these preventive maintenance tasks needs to be evaluated to determine if the reliability of the affected breakers has been degraded. Pending further evaluation of the above issue by the licensee and subsequent review by NRC inspectors, this issue will be tracked as URI 05000458/2015009-01, Vendor and Industry Recommended Testing Adequacy on Safety-related and Safety-significant Circuit Breakers.d and Safety-significant Circuit Breakers.
23:59:59, 30 June 2015 +
23:59:59, 30 June 2015 +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
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Troy Pruett +, Rick Deese +, James Drake +, T Hartman +, E Uribe +, J Watkins +, T Pruettc +, Dan Bradley + and Smithd Bradley +
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>.
00:54:18, 21 February 2018 +
Troy Pruett +, Rick Deese +, James Drake +, T Hartman +, E Uribe +, J Watkins +, T Pruettc +, Dan Bradley + and Smithd Bradley +
23:59:59, 30 June 2015 +