05000368/FIN-2016007-07
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Finding | |
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| Title | Failure to Maintain Service Water Design Cooling to the Unit 2 High Pressure Safety Injection Pump Seal and Bearing Coolers |
| Description | The team identified a Green finding and an associated non-cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the licensees failure to assure that the design basis service water cooling flow rates for the Unit 2 high pressure safety injection pump bearing and seal coolers were correctly translated into operating and surveillance procedures. Specifically, the pump surveillance and operating procedures were inadequate to monitor for, or correct degraded service water flow to the pump seal and bearing coolers. The procedures allowed for zero flow to the coolers, whereas the design drawing required 20 gallons per minute. The licensees corrective actions included performing an immediate operability determination and determining the pumps were operable based on the most recent surveillance flow tests, requesting a prompt operability determination, scheduling inspection of the seal and bearing coolers, and documenting the issue in the corrective action program as condition reports CR-ANO-2-2016-00672 and CR-ANO-2-2016-00674. The failure to correctly incorporate the design basis service water cooling flow for the Unit 2 high pressure safety injection pump coolers into the operating and surveillance procedures was a performance deficiency. The performance deficiency was determined to be more than minor because it was associated with the design control attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to incorporate the design basis service water cooling flow into the operating and surveillance procedures could result in the failure of the high pressure safety injection pumps during accident mitigation. The finding was evaluated Inspection Manual Chapter 0609, Significance Determination Process, Attachment 0609.04, Initial Characterization of Findings, and Appendix A, The Significance Determination Process (SDP) for Findings At-Power, Exhibit 2 Mitigating Systems Screening Questions, dated June 19, 2012. The team determined the finding was of very low safety significance (Green) because the finding was a deficiency affecting the design or qualification of a mitigating system, structure or component, but the system, structure or component maintained its operability. The team did not identify a cross-cutting aspect for this issue because the cause of this performance deficiency was not reflective of current performance. |
| Site: | Arkansas Nuclear  |
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| Report | IR 05000368/2016007 Section 4OA4 |
| Date counted | Mar 31, 2016 (2016Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 95003 |
| Inspectors (proximate) | B Correll C Osterholtz D Betancourt D Lackey D Willis E Duncan G Hansen J Brand J Dixon J Mateychick L Mckown M Holmberg M Keefe M Phalen N O'Keefe P Mckenna R Alexander R Deese R Kopriva R Kumana S Graves S Morrow S Rich S Smith T Hartman W Sifre Z Hollcraft |
| Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
| INPO aspect | |
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Finding - Arkansas Nuclear - IR 05000368/2016007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Arkansas Nuclear) @ 2016Q1
Self-Identified List (Arkansas Nuclear)
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