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A self-revealing finding was identified fo … A self-revealing finding was identified for the failure of operations and maintenance personnel to follow Procedure 01DP-9ZZ01, \"Systematic Troubleshooting,\" and resolve a discrepancy with a work instruction prior to proceeding with troubleshooting. Specifically, maintenance and operations personnel did not resolve an error in Work Order 3174332 when troubleshooting Breaker NBN-S01A that failed to trip, resulting in a loss of the non-vital electrical bus that supplied power to the nuclear cooling water and normal chilled water systems. This issue was entered into the licensee\'s corrective action program as Palo Verde Action Request 3174647. The finding is greater than minor because it is associated with the initiating events cornerstone attribute of configuration control and affects the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown and power operations. Using the Manual Chapter 0609 Appendix G, \"Shutdown Operations Significance Determination Process,\" the finding is determined to have very low safety significance because the finding did not result in a loss of shutdown safety functions. This finding has a crosscutting aspect in the area of human performance associated with work practices because maintenance and operations personnel proceeded in the face of uncertainty or unexpected circumstances (H.4(a)) (Section 1R12.2)ed circumstances (H.4(a)) (Section 1R12.2) +
23:59:59, 30 June 2008 +
23:59:59, 30 June 2008 +
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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Gerond George +, Geoffrey Miller +, M Hay +, G Apger +, L Ricketson +, J Adams +, R Treadway +, J Bashore +, Michelle Catts +, Paul Elkmann +, Wayne Sifre +, Jim Melfi + and J Razo +
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>.
03:05:07, 30 May 2018 +
Gerond George +, Geoffrey Miller +, M Hay +, G Apger +, L Ricketson +, J Adams +, R Treadway +, J Bashore +, Michelle Catts +, Paul Elkmann +, Wayne Sifre +, Jim Melfi + and J Razo +
23:59:59, 30 June 2008 +
Failure to Resolve Discrepancies Between Installed Equipment and Work Instructions Results in Mispositioning Event +