05000445/FIN-2013002-06
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Finding | |
|---|---|
| Title | Failure to Install Grout Under Pipe Support Base Plates |
| Description | The inspectors identified a non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, for the failure to install grout under pipe support base plates for a main steam line in accordance with drawings. As a result, the pipe supports ability to withstand a seismic event was degraded. The licensee entered the finding in the corrective action program as Condition Report CR-2012-008954. The licensees failure to install grout under pipe support base plates for a main steam system pipe in accordance with drawings was a performance deficiency. The finding was more than minor because it was associated with the protection against external factors attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective to ensure the capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the lack of grout under the pipe support base plates reduced the capability of the support to protect the piping from a seismic event. Using NRC Manual Chapter 0609, Appendix A, The Significance Determination Process for Findings At-Power, the finding was determined to be of very low safety significance because the finding did not result in the total loss of any safety function that contributes to external event initiated core damage accident sequences. Specifically, despite the degraded condition, the inspectors concluded that the main steam system was capable of performing its safety functions. Since the performance deficiency occurred prior to 1993, the inspectors concluded that the finding was not representative of current licensee performance and no cross-cutting aspect was assigned. |
| Site: | Comanche Peak  |
|---|---|
| Report | IR 05000445/2013002 Section 4OA5 |
| Date counted | Mar 31, 2013 (2013Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | W Walker B Tindell C Osterholtz J Kramer N Hernandez D Strickland |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| INPO aspect | |
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Finding - Comanche Peak - IR 05000445/2013002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Comanche Peak) @ 2013Q1
Self-Identified List (Comanche Peak)
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