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An NRC-identified, non-cited violation (NC … An NRC-identified, non-cited violation (NCV) of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, was identified because the licensee failed to promptly identify a condition adverse to quality associated with the material condition of the Unit 2 charging service water (CH/SW) piping. Specifically, the NRC resident inspectors identified a leak in the discharge piping of the Unit 2 A CH/SW pump on November 24, 2014. The licensee had previously identified a leak on the Unit 1 B CH/SW pump discharge piping on June 16, 2014. The issue was documented in the licensees corrective action program (CAP) as condition report (CR) 563166. The licensees failure to identify a condition adverse to quality associated with the material condition of the Unit 2 A CH/SW piping was a performance deficiency (PD). The inspectors determined that the PD was more than minor because it was associated with the equipment performance attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, not having compensatory actions in place for CH/SW Green Thread piping that has been prone to through-wall leaks, left the licensee susceptible to undetected leaks from the CH/SW piping systems. Using Manual Chapter 0609.04, Initial Characterization of Findings, Table 2, dated June 19, 2012, the finding was determined to adversely affect the Mitigating Systems Cornerstone. The inspectors screened the finding using Manual Chapter 0609, Appendix A, Significance Determination Process (SDP) for Findings at- Power, dated June 19, 2012, and determined that it screened as Green because the PD did not affect the design or qualification of the CH/SW system and the leak rate did not represent an actual loss of system safety function. This finding has a cross-cutting aspect in the evaluation component of the problem identification and resolution, P.2, because the organization did not thoroughly evaluate issues to ensure that resolutions address causes and extent of conditions commensurate with their safety significance. Specifically, the license did not institute compensatory actions for a long-term corrective action on CH/SW piping that has had a recent history of developing through-wall leaks. history of developing through-wall leaks.

Discovered date

23:59:59, 31 March 2015 +

Docket

05000281 +

Event date

23:59:59, 31 March 2015 +

Finding integer

1 +

Finding type

Non-cited violation +

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PI.2 +

IR 05000280/2015001 +

Inspector

A Toth +, Philip Mckenna +, Steven Rose +, Phillip Capehart + and Clint 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>.

12:58:35, 25 September 2017 +

Person