05000528/FIN-2013002-05
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Finding | |
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Title | Shutdown Cooling Piping Failure |
Description | A self-revealing, Green NCV of 10 CFR Part 50, Appendix B, Criterion III Design Control, was identified for the failure of the licensee to assure that applicable regulatory requirements and the design basis are correctly translated into specifications, drawings, procedures, and instructions. Specifically, operations personnel altered the piping configuration with an added fitting to a low pressure safety injection drain line. As a result the pipe failed during shutdown cooling operations, rendering that train inoperable. The licensee repaired the weld in accordance with ASME Code, entered the issue into the licensees CAP as CRDR 4263357,and revised procedural guidance to return components to their design configuration. The inspectors concluded that the failure of the licensee to correctly translate the design basis into specifications, drawings, procedures and instructions was a performance deficiency. The performance deficiency was more than minor, therefore a finding, because it adversely affected the equipment performance attribute of the Mitigating Systems Cornerstone and its objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors evaluated the significance of the issue under the SDP, as defined in Inspection Manual Chapter 0609.04, Initial Characterization of Findings, and IMC 0609, Appendix G, Shut Down Operations Significance Determination Process. The inspectors determined that because there was an injection path available, the leak could be isolated prior to depletion of the reactor water tank, and the steam generators were available for heat removal. As a result, the issue was found to be of very low safety significance (Green). The inspectors determined the finding had no cross-cutting issues because it is not indicative of current performance. |
Site: | Palo Verde ![]() |
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Report | IR 05000528/2013002 Section 4OA3 |
Date counted | Mar 31, 2013 (2013Q1) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Self-revealing |
Inspection Procedure: | IP 71153 |
Inspectors (proximate) | L Ricketson G Guerra M Brown P Elkmann L Carson D Allen J Melfi J Laughlin B Larson M Baquera D Reinert N Greene |
Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
INPO aspect | |
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Finding - Palo Verde - IR 05000528/2013002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2013Q1
Self-Identified List (Palo Verde)
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