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A self-revealing Green NCV of Technical Sp … A self-revealing Green NCV of Technical Specification 6.8.1, Administrative Controls-Procedures, was identified because Exelon did not implement procedure use and adherence requirements when workers changed the scope of work on emergency diesel generator (EDG) fuel oil day tanks and did not revise the work instructions when they determined that work could not be performed as written. This resulted in EDG D13 accruing approximately 40 hours of unplanned unavailability between December 14 and 16, 2012. Exelon entered the issue into their CAP as IR 1453737, conducted a human performance review board, drained and flushed the tank to restore fuel oil quality, and initiated an ACE. This finding was more than minor because it was associated with the Human Performance attribute of the Mitigating Systems cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The finding was determined to be self-revealing because it was revealed through the receipt of alarms during operation which required no active and deliberate observation by the Exelon staff. The finding was determined to be of very low safety significance (Green) in accordance with Section A of Exhibit 2 of IMC 0609, Appendix A, The Significance Determination Process for Findings at Power, because the finding did not represent an actual loss of function a single train for greater than the TS allowed outage time. This finding had a cross-cutting aspect in the area of Human Performance, Work Practices, because Exelon did not ensure that personnel followed procedures (H.4(b)). Specifically, work order procedural steps to clean the fuel oil tank were not completed as directed by the work order and a procedurally required change to written work instructions was not implemented when station personnel determined that the fuel oil tank cleaning would be based on the need to clean the tank as determined by tank inspection results. as determined by tank inspection results.

Discovered date

23:59:59, 31 December 2012 +

Docket

05000352 + and 05000353 +

Event date

23:59:59, 31 December 2012 +

Finding integer

2 +

Finding type

Non-cited violation +

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Hours

4.62963e-4 d (0.0111 hours, 6.613757e-5 weeks, 1.522e-5 months) +

INPO aspect

WP.4 +

Identified by

Self-revealing +

Inspection Manual Chapter

NRC Inspection Manual 0609/Appendix A, The Significance Determination Process (SDP) for Findings At-Power +

Inspection procedure

IP 71111.19 +

Inspection report

IR 05000352/2012005 +

Inspector

J Caruso +, Mel Gray +, R Nimitz +, J Hawkins +, S Barr +, P Kaufman +, Andrew Rosebrook +, Eugene Dipaolo +, Christopher Newport + and Joseph Demarshall +

Issue report

AR 01453737 +

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>.

19:05:37, 30 September 2017 +

Person