05000313/FIN-2014003-04
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Finding | |
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| Title | Failure to Follow Procedures for Through Wall Leaks |
| Description | The inspectors identified a finding for failure to follow Procedure EN-LI-102, Corrective Action Process, Revision 23. A through wall leak in the piping of the spent fuel pool cooling (SFP) system downstream of valve SFP 23 was identified in August 2009. Th
licensee failed to evaluate or correct the through wall flaw in the spent fuel pool piping in a timely manner. The section of piping containing the flaw was isolated and tagged out of service. This issue was documented in Condition Report CR-ANO-C-2014-1801 The inspector determined that the licensees failure to evaluate or correct the leak in th Unit 1 spent fuel pool cooling system was a performance deficiency. The finding was more than minor in accordance with Inspection Manual Chapter 0612, Appendix B, Issue Screening, because it was associated with the barrier integrity cornerstone attribute of design control and adversely affected the structural integrity of the spent fuel pooling cooling system. Specifically, from August 2009 to present, the licensee failed to appropriately evaluate or correct a through wall flaw in the piping in the spent fuel pool cooling system to ensure structural integrity of the piping. The inspectors evaluated the finding using Inspection Manual Chapter 0609, Significance Determination Process, Attachment 0609.04, Initial Characterization of Findings, Tables 2 and 3, dated June 19, 2012, and Appendix A, The Significance Determination Process (SDP) for Findings At-Power, Exhibit 3, Part D, for the spent fuel pool, dated June 19, 2012. The inspector determined the finding to be of very low safety significance (Green) because the finding did not cause the pool temperature to exceed the maximum analyzed temperature limit; it did not cause mechanical damage to fuel clad and a detectible release of radionuclides; it did not result in a loss of spent fuel pool water inventory below the minimum analyzed level limit; and it did not affect the spent fuel pool neutron absorber, fuel bundle misplacement, or soluble boron concentration. The finding had a cross-cutting aspect in the area of human performance, conservative bias, because the licensee failed to use decision-making practices that emphasize prudent choices over those that are simply allowable. Specifically, the licensee failed to make conservative decisions regarding a through wall flaw in the spent fuel pool cooling system, an ASME Code Class 3 moderate energy component, to ensure that the resolution addressed the condition commensurate with its safety significance [H.14]. |
| Site: | Arkansas Nuclear  |
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| Report | IR 05000313/2014003 Section 1R08 |
| Date counted | Jun 30, 2014 (2014Q2) |
| Type: | Finding: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.08 |
| Inspectors (proximate) | M Young N Greene P Jayroe R Latta A Fairbanks B Baca B Tindell G Werner J Melfi J O'Donnell L Carson L Ricketson |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Arkansas Nuclear - IR 05000313/2014003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Arkansas Nuclear) @ 2014Q2
Self-Identified List (Arkansas Nuclear)
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