05000250/FIN-2010005-03
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Finding | |
|---|---|
| Title | Welders failed to measure preheat and interpass temperatures |
| Description | The inspectors identified a Non-cited violation (NCV) of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings associated with licensee contract personnels failure to adhere to welding procedures during the 2010 Unit 3 refueling outage. Specifically, welders failed to measure preheat and interpass temperatures in ASME safety class containment spray pump lines using contact pyrometers, thermocouples, or temperature indicating crayons as required by procedure. As part of the immediate corrective actions, the licensee conducted a stand-down for welders to reinforce procedural compliance expectations. The licensee performed an extent of condition evaluation and entered the issue into their corrective action program as AR 585550585550 The inspectors determined that the finding was more than minor because if left uncorrected, it would have become a more significant safety concern. Specifically, the failure to adhere to the welding procedures for temperature measurement affected the assurance that appropriate welding temperatures were maintained. Inadequate temperatures during welding can result in stainless steel sensitization and susceptibility of the weld to failure from intergranular stress corrosion cracking (IGSCC) affecting the containment spray system. The inspectors also determined that this finding impacted the Barrier Integrity Cornerstone human attribute and affected the cornerstone objective of ensuring the physical barriers protect the public from radionuclide releases caused by accidents. The finding was determined to be of very low safety significance because the finding did not result in an actual loss of operability or functionality of containment spray system per Table 4a, NRC Inspection Manual Chapter 0609, Attachment 4. The cause of the finding is related to the cross-cutting aspect of Human Performance, Work Practices (H.4(c)), because licensee personnel failed to ensure supervisory and management oversight activities of their contractors such that nuclear safety was ensured. |
| Site: | Turkey Point  |
|---|---|
| Report | IR 05000250/2010005 Section 1R08 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.08 |
| Inspectors (proximate) | G Kuzo R Aiello R Carrion M Barillas S Stewart D Rich A Vargas A Sengupta R Kellner |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Turkey Point - IR 05000250/2010005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Turkey Point) @ 2010Q4
Self-Identified List (Turkey Point)
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