05000400/FIN-2011003-02
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Finding | |
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| Title | Inadequate Procedure for Identifying Accumulated Gas in ECCS Systems |
| Description | The inspectors identified a Green non-cited violation (NCV) of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the licensees failure to establish adequate instructions to identify accumulated gas in Emergency Core Cooling Systems (ECCS). Specifically, the operations surveillance test procedure, OST- 1107, ECCS flow path and piping filled verification monthly interval Modes 1-2-3-4-5, Rev 29, could allow accumulated gases inside ECCS to be vented without being quantified and evaluated for potential adverse impacts on system operability. The licensee entered this in their corrective action program (CAP) as ARs #459683 and #459572. The corrective actions included the performance of UTs at 100% of the vented locations prior to venting the system to quantify and evaluate the effects of any gas discovered by the UTs. The inspectors determined that licensees failure to establish adequate instructions to identify accumulated gas in ECCS was a performance deficiency. The finding was more than minor because if left uncorrected, the performance deficiency had the potential to lead to a more significant safety concern. Specifically, if left uncorrected the potential existed for an unacceptable void that could affect ECCS operability to remain undetected. The inspectors screened this finding in accordance with Inspection Manual Chapter (IMC) 0609, Significance Determination Process, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, and determined the finding was of very low safety significance (Green) since it was a deficiency determined not to have resulted in the loss of operability or functionality as determined by the review of UTs performed by the licensee through the PM program. While the PM UTs were performed at a lower frequency, the results provided reasonable assurance regarding operability of the ECCS. The inspectors determined that the finding has a cross-cutting aspect in the area of problem identification and resolution because the licensee failed to implement operating experience from GL 2008-01 into station procedures (P.2(b)). Specifically, GL 2008-01 stated, in part, that Volumes that are close to impacting operability may require more sophisticated measurement. |
| Site: | Harris  |
|---|---|
| Report | IR 05000400/2011003 Section 4OA5 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Alen J Austin J Eargle P Lessard R Musser |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Harris - IR 05000400/2011003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Harris) @ 2011Q2
Self-Identified List (Harris)
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