05000482/FIN-2011004-09
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | Title 10 CFR 50.55a, Codes and Standards, requires, in part, that the Wolf Creek refueling water storage tank meet the requirements of the 1974 editions of the ASME Boiler and Pressure Vessel Code,Section III. Subsection NC-4424, Surfaces of Welds, requires, in part, that as-welded surfaces be sufficiently free from coarse ripples, grooves, overlaps, abrupt ridges and valleys so that the surface conditions of the finished weld shall be suitable for the proper interpretation of nondestructive examination of the welds. Subsection NC-5351, Evaluation of Indications, requires, in part, that any indication which is believed to be nonrelevant be regarded as a defect and be re-examined to verify whether or not actual defects are present. Contrary to the above, from September 3, 1985, to May 20, 2011, the Wolf Creek refueling water storage tank failed to meet the requirements of Subsection NC-4424 and NC-5351 due to four through-wall flaws that were identified. Wolf Creek repaired the affected welds prior to restarting the reactor. This issue is captured in Condition Reports 36857, 36880, 36881, 36937, and 36938. This issue was determined to be of very low safety significance (Green) because the functionality of the refueling water storage tank was not affected. |
| Site: | Wolf Creek |
|---|---|
| Report | IR 05000482/2011004 Section 4OA7 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Peabody G Miller J Bashore L Carson L Willoughby N Makris S Alferink C Long |
| INPO aspect | |
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Finding - Wolf Creek - IR 05000482/2011004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2011Q3
Self-Identified List (Wolf Creek)
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