05000368/FIN-2016007-08
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Finding | |
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| Title | Inadequate Flow Monitoring of Unit 2 Service Water to Emergency Feedwater Pump Suction Supply |
| Description | The team identified a Green finding and an associated non-cited violation of 10 CFR Part 50, Appendix B, Criterion XI, Test Control, for the licensees failure to establish a test program for the Unit 2 service water supply to emergency feedwater pump suction lines. Specifically, the licensee failed to demonstrate that flow through this line would remain satisfactory for design basis accidents. The licensees corrective actions included performing an operability determination and determining that the last performance of the procedure in 2015 documented a flow rate greater than the required value, was evaluating the lack of a surveillance test program for monitoring flow rate loss in these lines, and documenting the issue in the corrective action program as condition report CR-ANO-2-2016-00670. The failure to establish a test program for the Unit 2 service water to emergency feedwater pump suction supply line was a performance deficiency. The performance deficiency was determined to be more than minor because, it was associated with the equipment performance 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 monitor the flow through the Unit 2 service water to emergency feedwater pump suction supply line could result in loss of adequate flow to support emergency feedwater pumps for accident mitigation. The finding was evaluated using 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 error that caused this 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 'Keefep 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 XI |
| 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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