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The inspectors identified a Green non-cite … The inspectors identified a Green non-cited violation of 10 CFR Part 50.65 (a)(4), when the licensee removed the severe accident mitigation guideline (SAMG) diesel generators from service without considering the change in the online plant risk. Online plant risk is modeled and communicated to licensee plant personnel via the equipment out of service (EOOS) profile. The change in online risk was not reflected in the EOOS profile when the SAMG diesel generators were out of service from July 6, 2009 to July 8, 2009. Once the deficiency was identified on July 8, 2009, the EOOS profile was updated by the licensee and reflected the SAMG diesel out of service condition. This finding was entered into the licensees corrective action program as NCR #351002. The finding was determined to be more than minor because the finding related to maintenance risk assessment and risk management issues. Specifically, the licensees risk assessment failed to consider risk significant structures, systems, or components that were unavailable during maintenance. The inspectors evaluated the finding in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Phase 1 - Initial Screening and Characterization of findings, Table 3a for the Mitigating Systems Cornerstone. The finding was determined to degrade the licensees assessment and management of risk associated with performing maintenance activities under all plant operation or shutdown conditions. In accordance with Baseline Inspection Procedure (IP) 71111.13, Maintenance Risk Assessment and Emergent Work Control, and IMC 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process, the finding was determined to be a maintenance risk assessment issue. Flowchart 1, Assessment of Risk Deficit, requires the inspectors to determine the risk deficit associated with this issue. The finding was determined to be of very low safety significance because the incremental core damage probability deficit was less than 1 x 10E-6. The regional senior reactor analyst reviewed the information and confirmed that the system was a maintenance rule safety significant system. This finding has a cross-cutting aspect in the area of human performance, work control component, because the licensee did not plan and coordinate work activities consistent with nuclear safety. Specifically, the licensee failed to include risk significant maintenance in the EOOS profile when the SAMG diesel generators were out of service from July 6, 2009 until July 8, 2009 (H.3(a))m July 6, 2009 until July 8, 2009 (H.3(a))

Discovered date

23:59:59, 30 September 2009 +

Docket

05000324 + and 05000325 +

Event date

23:59:59, 30 September 2009 +

Finding integer

5 +

Finding type

Non-cited violation +

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INPO aspect

WP.1 +

Identified by

NRC identified +

Inspection Manual Chapter

NRC Inspection Manual 0609 + and NRC Inspection Manual 0609, Appendix K +

Inspection procedure

IP 71111.13 +

Inspection report

IR 05000324/2009004 +

Inspector

Randy Musser +, J Polickoski +, James Reece +, Steven Rose +, Gregory Kolcum +, Rodney Clagg +, Phillip Capehart + and Christopher Welch +

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>.

00:40:13, 29 October 2017 +

Person