05000346/FIN-2013010-03
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Finding | |
|---|---|
| Title | Failure to Completely Repair Shield Building Concrete Voiding |
| Description | A finding of very low safety significance and associated Non-Cited Violation of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, was identified by the inspectors for the licensees failure in 2011 to properly repair concrete voiding in the shield building that had been identified during that construction opening restoration. The inspectors determined the performance deficiency of failure to completely repair the void during the 2011 shield building restoration was more than minor and; therefore, a finding because the performance deficiency was associated with the Barrier Integrity cornerstone attribute of Design Control and adversely impacted the cornerstone objective to provide reasonable assurance that physical design barriers (fuel cladding, reactor coolant system, and containment) protect the public from radionuclide releases caused by accidents or events. Specifically, the licensees failure to completely repair the concrete voiding in 2011 resulted in the operation of the plant with the shield building in a condition non-conforming to its design basis. The inspectors reviewed the finding using Attachment 0609.04, Initial Characterization of Findings, Table 3 SDP Appendix Router. The inspectors answered No to all the questions in Section A of Table 3 and; therefore, the finding was evaluated using the SDP in accordance with IMC 0609, The Significance Determination Process (SDP) for At-Power Operations, Appendix A, Exhibit 3, Barrier Integrity Screening Questions. The inspectors answered all the questions in Exhibit 3 and determined that this finding did not represent an actual open pathway in the physical integrity of reactor containment. Therefore, the finding was determined to have very low safety significance (Green). The inspectors determined that this finding had a cross-cutting aspect in the area of Human Performance, Conservative Bias, for the licensees failure to use decision making practices that emphasize prudent choices over those that are simply allowable. Specifically, the licensee failed to implement a conservative decision to inspect the shield building inside surface void area after repairs had been made during the opening restoration in 2011. Therefore, the licensee missed the opportunity to identify that they had not adequately repaired the void. |
| Site: | Davis Besse  |
|---|---|
| Report | IR 05000346/2013010 Section 4OA5 |
| Date counted | Sep 30, 2014 (2014Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Shaikh D Hills D Kimble J Neurauter M Mitchell N Egan T Briley V Meghani |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Davis Besse - IR 05000346/2013010 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Davis Besse) @ 2014Q3
Self-Identified List (Davis Besse)
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