05000331/FIN-2013002-05
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Finding | |
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| Title | Failure to Conduct Adequate Post-Maintenance Testing |
| Description | The inspectors identified a finding of very low safety significance (Green) and associated non-cited violation of 10 CFR 50, Appendix B, Criterion XI, Test Control, for the licensees failure to conduct post maintenance testing in accordance with procedure Maintenance Directive (MD)-024, Post-Maintenance Testing, following maintenance on secondary containment damper 1VAD017B1. Specifically, the testing that the licensee performed was not adequate to verify that the damper could perform its intended function and resulted in the damper subsequently failing in service. The licensee entered the issue into their CAP as CR 01862900. Immediate corrective actions included declaring secondary containment inoperable, determining if any other dampers were not fully closed (none were identified), and rebuilding and retesting damper 1VAD017B1. The performance deficiency was determined to be more than minor because it was associated with the Barrier Integrity Cornerstone attribute of Procedure Quality and adversely affected the cornerstone objective of ensuring that physical design barriers (secondary containment) protect the public from radionuclide releases caused by accidents. The finding screened as having very low safety significance (Green) because it represented a degradation of the radiological barrier provided for the secondary containment building and the inspectors answered No to Questions B.1 and B.2 in IMC 0609, Appendix A, Exhibit 3, Barrier Integrity Screening Questions. The inspectors determined that the most significant causal factor of the performance deficiency was associated with the cross-cutting aspect of Problem Identification and Resolution, having Corrective Action Program Components, and involving the licensee thoroughly evaluating problems such that the resolutions address causes and extent of conditions, as necessary. Specifically, for the damper of concern, the licensee did not implement corrective actions from root cause evaluation (RCE) 01739467, which stated Create a maintenance procedure for rebuilding and adjusting secondary containment dampers and operators that directs the following: provide guidance on adjusting over travel of damper blades [aka stop rod adjustment], and limit switch verification. |
| Site: | Duane Arnold  |
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| Report | IR 05000331/2013002 Section 4OA2 |
| Date counted | Mar 31, 2013 (2013Q1) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | J Corujo _Sandin L Haeg R Murray S Bell B Orlikowsk |
| Violation of: | 10 CFR 50 Appendix B Criterion XI |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Duane Arnold - IR 05000331/2013002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Duane Arnold) @ 2013Q1
Self-Identified List (Duane Arnold)
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