05000313/FIN-2016007-11
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Finding | |
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Title | Pressurizer Block Valve Not Installed in the Qualified Environmental Configuration |
Description | The team identified a Green finding and an associated non-cited violation of 10 CFR 50.49(f) for the licensees failure to ensure that Unit 1 pressurizer block valve CV-1000, was installed in the qualified configuration. Specifically, the safety-related motor operated block valve was installed with the limit switch compartment facing downward instead of up. The licensees corrective actions included performing a prompt operability determination and determining the valve was operable, evaluating the extent of condition, and documenting the issue in the corrective action program as condition report CR-ANO-C-2016-00884. The failure to ensure the pressurizer motor operated block valve CV-1000 was in the qualified configuration was a performance deficiency. The performance deficiency was determined to be more than minor because, it was associated with the design control and equipment performance attributes 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, valve CV-1000 not being installed in the qualified configuration increased the possibility of leaking grease or accumulating condensation in the limit switch compartment which could cause failure, electrical shorts or erratic operation. 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 problem identification and resolution cross-cutting aspect of Operating Experience because the licensee failed to systematically and effectively collect, evaluate, and implement relevant internal and external operating experience in a timely manner [P.5]. |
Site: | Arkansas Nuclear ![]() |
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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 50.49 |
CCA | P.5, Operating Experience |
INPO aspect | CL.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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