05000331/FIN-2011002-04
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | The licensee identified a finding of very low safety significance (Green) and an associated NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the failure to provide adequate instructions for venting air from the HPCI system. Specifically, on February 23, 2011, following maintenance on the HPCI system and subsequent operability test run, the licensee failed to adequately vent an instrument line. This led to the licensee declaring HPCI inoperable due to indications of air in the instrument line on February 26, 2011. The licensee wrote CR 1624116 to document the issue. Immediate corrective actions included thoroughly venting the system and performing surveillance testing to demonstrate system operability. The failure to have adequate instructions for venting the HPCI system was a performance deficiency. The performance deficiency was more than minor because it affected the Mitigating Systems Cornerstone attribute of procedure quality and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Evaluating the finding using the SDP in accordance with IMC 0609, Significance Determination Process, it screened as having very low safety significance (Green) using Table 4a of IMC 0609 because all questions under the Mitigating Systems Cornerstone column were answered No. |
| Site: | Duane Arnold  |
|---|---|
| Report | IR 05000331/2011002 Section 4OA7 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | L Haeg M Mitchell R Murray A Wilson B Cushman K Riemer |
| INPO aspect | |
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Finding - Duane Arnold - IR 05000331/2011002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Duane Arnold) @ 2011Q1
Self-Identified List (Duane Arnold)
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