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The inspectors identified a non-cited viol … The inspectors identified a non-cited violation of License Condition 2.C(41), Fire Protection Program, involving the failure to ensure that manhole MH01 was properly sealed to prevent entry of flammable liquid. Specifically, on February 20, 2013, four manhole covers had between one to three loose bolts and evidence of water seepage. These vaults contain safety related cables for standby service water trains A and B. Immediate corrective actions included cleaning and tapping the bolt holes to ensure proper thread engagement, adding work instructions to the preventative maintenance procedure to clean the manhole bolt holes, and verifying that the other manholes containing safetyrelated cables did not have similar issues with loose bolts on the manhole covers. The licensee entered this issue in their corrective action program as Condition Report CR-GGN-2013-01348. This finding is more than minor because it is associated with the Mitigating Systems Cornerstone attribute of protection against external factors and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using NRC Inspection Manual Chapter 0609, Attachment 4, Initial Characterization of Findings, the inspectors determined that the issue affected the Mitigating Systems Cornerstone and required the use of Inspection Manual Chapter 0609, Attachment 4, Appendix F, Fire Protection Significance Determination Process. However, an NRC senior reactor analyst determined that the unique nature of this performance deficiency did not lend itself to analysis by the methods provided in Appendix F. Therefore, a Phase 3 analysis was performed. Based on a bounding analysis, the analyst determined that the change in core damage frequency was approximately 1.5E-7/yr. The result was low because of the relatively short periods of time that fuel was actually being transferred, the low probability of transfer system failures, and the low likelihood that a loss of normal service water initiator would occur following a fire in the subject manholes. The finding has a cross-cutting aspect in the human performance area associated with the resources component because the licensee did not provide adequate work packages.ee did not provide adequate work packages.

Discovered date

23:59:59, 31 March 2013 +

Docket

05000416 +

Event date

23:59:59, 31 March 2013 +

Finding integer

1 +

Finding type

Non-cited violation +

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INPO aspect

WP.3 +

Identified by

NRC identified +

Inspection Manual Chapter

NRC Inspection Manual 0609 +

Inspection procedure

IP 71111.06 +

Inspection report

IR 05000416/2013002 +

Inspector

J Laughlin +, S Achen +, B Rice +, David Proulx +, Shiattin Makor +, Jonathan Braisted +, Sean Hedger + and Rich Smith +

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>.

03:47:25, 28 September 2017 +

Person