05000456/FIN-2009005-02
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Finding | |
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Title | Failure to Establish 2-to-1 Weld Profile on AF Cross-Tie Drain Line Socket Welds |
Description | On October 20, 2009, the inspectors identified a Green finding and an associated Non-Cited Violation of 10 CFR Part 50, Appendix B, Criterion V, for the licensees failure to follow work order instructions and establish a 2-to-1 weld profile on the auxiliary feedwater system cross-tie pipe drain line socket welds. Licensee corrective actions included rejecting the nonconforming welds, establishing interim guidance for the range of acceptable socket weld profiles, and initiating revisions to weld procedures to clarify applicable instructions. The inspectors determined that this finding was more than minor because, if left uncorrected, the failure to properly control maintenance activities could become a more significant safety concern. Specifically, the failure to implement a 2-to-1 socket weld profile could result in a vibration induced pipe fatigue failure affecting the operability of Unit 2 Auxiliary Feedwater System Train A. This finding was of very low safety significance because it was a design or qualification deficiency, confirmed to not result in loss of operability or functionality. This finding has a cross-cutting aspect in the area of Human Performance, Resources because the licensee did not provide adequate procedural resources (H.2(c)). Specifically, the licensee failed to ensure that the work instruction for the welding contained adequate guidance to implement the required 2-to-1 weld profile |
Site: | Braidwood ![]() |
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Report | IR 05000456/2009005 Section 1R08 |
Date counted | Dec 31, 2009 (2009Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.08 |
Inspectors (proximate) | A Garmoe B Dickson B Metrow B Palagi J Gall M Holmberg M Mitchell M Perry R Jickling R Ng R Skokowski |
CCA | H.7, Documentation |
INPO aspect | WP.3 |
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Finding - Braidwood - IR 05000456/2009005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2009Q4
Self-Identified List (Braidwood)
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