05000454/FIN-2014005-03
Finding | |
|---|---|
| Title | Welding Procedure Specification Variables Changed Without Revision or Amendment Contrary to ASME Code |
| Description | The inspectors identified a finding of very low safety significance and associated NCV of 10 CFR Part 50, Appendix B, Criterion IX, Control of Special Processes, for the failure to revise or amend a welding procedure specification (WPS) after changing welding variables, including an increase in amperage, for welding performed on the SI system. The licensee interviewed the welders who indicated that they would likely not have increased the amperage to the range permitted, to restore compliance. Th
licensee planned to review the use of vendor technical information (VTIP) manual information for welding criteria and cover this issue with the work order planners. Also, the site welding administrator planned to review the issue to be aware of possible WPS deviations in work instructions. The issue was entered into the licensees CAP as IR 02392483. The inspectors determined that this issue was more than minor in accordance with IMC 0612, Appendix B, Issue Screening, dated September 7, 2012, because the inspectors answered "Yes" to the More-than-Minor question, If left uncorrected, would the performance deficiency have the potential to lead to a more significant safety concern? Specifically, the welding variables were changed without appropriate process or documentation, or meeting ASME Code, which resulted in the permitted use of a significant increase in amperage above that in the WPS. This permitted the welders to use an elevated heat input which could have been detrimental to the components being welded. In accordance with Table 2, Cornerstones Affected by Degraded Condition or Programmatic Weakness, of IMC 609, Attachment 4, Initial Characterization of Findings, issued June 19, 2012, the inspectors checked the box under the Mitigating Systems Cornerstone because degradation of the SI system could degrade short term heat removal. The inspectors determined this finding was of very-low safety significance (Green) using Part A of Exhibit 2, Mitigating Systems Screening Questions, in IM 0609, Appendix A, The Significance Determination Process for Findings At-Power, issued on June 19, 2012. Specifically, the inspectors answered "Yes" to the screening question If the finding is a deficiency affecting the design or qualification of a mitigating SSC, does the SSC maintain its operability or functionality? The welders indicated that they would likely not have used the elevated heat inputs; and therefore, would still comply with the original WPS, and the issue did not result in the actual loss of the operability or functionality of a safety system. The finding had a cross-cutting aspect of Documentation in the area of Human Performance (IMC 0310 H.7). Specifically, the organization failed to create and maintain complete, accurate and up-to-date documentation. |
| Site: | Byron  |
|---|---|
| Report | IR 05000454/2014005 Section 1R08 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.08 |
| Inspectors (proximate) | C Thompson J Cassidy J Draper J Ellegood J Mcghee M Bielby M Holmberg R Baker R Jickling T Bilik |
| Violation of: | 10 CFR 50 Appendix B Criterion IX |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Byron - IR 05000454/2014005 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2014Q4
Self-Identified List (Byron)
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