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A finding of very low safety significance … A finding of very low safety significance and an associated NCV of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, was identified by the inspectors when licensee personnel failed to assure that leakage out of the B safety injection tank (SIT), a condition adverse to quality, was corrected in a timely manner. Specifically, although minor water leakage out of the B SIT had been occurring since at least 2010, the licensee had not corrected the leakage despite several plant outages that provided an opportunity to address the issue. This issue was entered into the licensee s CAP as CRPLP201404861, B SIT Declared Inoperable Due to Reaching Technical Specification Low Level Setpoint, dated October 7, 2014. The performance deficiency was determined to be more than minor because it was associated with the Equipment Performance attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the leakage out of the B SIT resulted in unexpected inoperability of the tank on October 7, 2014. The finding was determined to be of very low safety significance based on answering No to the screening questions in Exhibit 2.A, Mitigating Systems Screening Questions. This finding had a cross-cutting aspect in the Avoid Complacency component of the Human Performance cross-cutting area. Specifically, over time the licensee became confident that the long-term leakage out of the B SIT was minor and could be managed without an impact to equipment operability, which proved to be incorrect when the minor leakage resulted in B SIT inoperability on October 7, 2014.in B SIT inoperability on October 7, 2014. +

Discovered date

23:59:59, 31 March 2015 +

Docket

05000255 +

Event date

23:59:59, 31 March 2015 +

Finding integer

2 +

Finding type

Non-cited violation +

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QA.4 +

IR 05000255/2015001 +

Inspector

Eric Duncan +, M Phalen +, R Walton +, J Cassidy +, A Scarbeary +, J Lennartz +, Alex Garmoe + and Robert Elliott +

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>.

12:57:10, 25 September 2017 +

Person