05000346/FIN-2013010-02
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Finding | |
|---|---|
| Title | Use of Unqualified Procedure for Ultrasonic Examination of Shield Building Rebar |
| Description | The inspectors identified a finding of very low safety significance (Green) and an associated Non-Cited Violation of 10 CFR Part 50, Appendix B, Criterion IX, Control of Special Processes, when the licensee failed to use a qualified procedure for ultrasonic (UT) examination of the Shield Building reinforcing bars (rebar). Specifically, the licensee used a site approved UT examination procedure that had not been qualified to examine the total length of approximately twenty four inches of rebar as specified in the procedure due to near field scanning limitation. The inspectors determined that the performance deficiency of using an unqualified procedure was more than minor and; therefore, a finding because if left uncorrected, the performance deficiency would have the potential to lead to a more significant safety concern. Specifically, absent NRC identification, the licensee would have continued use of the unqualified UT examination procedure to examine potential degradation in potentially damaged rebar in the safety-related shield building. Therefore, the licensee could potentially have returned the shield building back to service with unacceptable flaws existing in the rebar. The inspectors determined the finding could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Initial Characterization of Findings. The inspectors answered 'Yes to 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 for Shutdown Operations, Appendix G, Attachment 1, Exhibit 4, Barrier Integrity Screening Questions. The inspectors answered all the questions in Exhibit 4 and determined that this finding did not result in degraded physical integrity of the containment during shutdown operations nor did it affect any shutdown safety functions. 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 Problem Identification and Resolution, and Evaluation for the licensees failure to thoroughly evaluate issues to ensure that resolutions address causes and extent of conditions commensurate with their safety significance. Specifically, the licensee failed to initially consider the entire length of rebar for potential evaluation and hence, did not consider the appropriate extent of condition. |
| 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 IX |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
| ' | |
Finding - Davis Besse - IR 05000346/2013010 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Davis Besse) @ 2014Q3
Self-Identified List (Davis Besse)
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