05000315/FIN-2010005-03
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Appendix B, Criterion III in 10 CFR Part 50 requires, in part, that design control measures shall provide for verifying or checking the adequacy of design, such as by the performance of design reviews, by the use of alternate or simplified calculational methods, or by the performance of a suitable testing program. Design control measures shall be applied to items such as the following: reactor physics, stress, thermal, hydraulic, and accident analyses; compatibility of materials; accessibility for inservice inspection, maintenance, and repair; and delineation of acceptance criteria for inspections and tests. Contrary to the above, the licensee did not perform design review and engineering calculations to check the adequacy of the original LBB analysis on pressurizer surge lines at the time of application of the pressurizer surge line weld overlays in 2006. Specifically, in October 2009, the licensee performed a non-conformance evaluation to address the validity of the original LBB analysis on the pressurizer surge lines that had undergone full structural weld overlays in 2006. In the non-conformance evaluation, the licensee identified that an engineering/design evaluation of the original LBB analysis and fatigue analysis as applicable to the pressurizer surge lines had not been performed at the time of application of the weld overlays in 2006. The licensee has implemented corrective actions to address the revision of the original LBB analysis to account for any changes due to weld overlay application and intends to submit a license amendment request for NRC approval of this updated LBB analysis in 2011. The corrective actions related to this LBB analysis update are being tracked in CR 00858419. This violation was of very low safety significance (Green) as dispositioned through the NRC Significance Determination Process. |
| Site: | Cook  |
|---|---|
| Report | IR 05000315/2010005 Section 4OA7 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Zoia J Jandovitz J Lennartz T Go A Garmoe P Laflamme J Cameron A Shaikh |
| INPO aspect | |
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Finding - Cook - IR 05000315/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Cook) @ 2010Q4
Self-Identified List (Cook)
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