05000313/FIN-2016007-09
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Finding | |
|---|---|
| Title | Emergency Feedwater Pump Casing Wall Loss Not Monitored |
| 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 monitoring the Unit 1 emergency feedwater pumps casing wall thickness loss to demonstrate that the pumps would remain satisfactory for service. The scope of the Wall Thinning Aging Management Program included the emergency feedwater pumps casing. However, the team noted that the procedure did not include wall thickness measurements on the emergency feedwater pumps casings. The licensees corrective actions included performing an immediate operability determination and determining the pumps were operable, and documenting the issue in the corrective action program as condition report CR-ANO-1-2016-00606. The failure to establish a test program for monitoring the Unit 1 emergency feedwater pumps casing wall thickness loss 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 Unit 1 emergency feedwater pumps casing wall thickness could result in a corrosion- or erosion-induced pump casing failure. 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. This finding had a human performance cross-cutting aspect of Work Management for failing to implement a process of planning, controlling, and executing work activities such that nuclear safety is an overriding priority. Specifically, the licensee entered the period of extended operation in May 2014 and had not established a surveillance procedure to monitor the corrosion induced wall loss of the pump casings as required by the approved aging management program [H.5]. |
| Site: | Arkansas Nuclear  |
|---|---|
| Report | IR 05000313/2016007 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 XI |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Arkansas Nuclear - IR 05000313/2016007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Arkansas Nuclear) @ 2016Q1
Self-Identified List (Arkansas Nuclear)
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