05000368/FIN-2016007-10
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Finding | |
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Title | Failure to Develop an Operability Decision-Making Issue for Degraded Condition on Safety Injection Tank |
Description | The team identified a Green finding for the licensees failure to create an operational decision making issue document per procedure EN-OP-111, Operability Decision Making Issue (ODMI) Process. Specifically, the licensee failed to evaluate the plant impact and operational challenges associated with not repairing safety injection tank check valve 2SI-13D bonnet leakage, which was identified prior to starting up from the fall 2016 outage. The leakage increased to the point where normal makeup capability was challenged. The licensees corrective actions included performing an unplanned shutdown to repair safety injection tank check valve 2SI-13D, and documenting the issue in the corrective action program as condition reports CR-ANO-2-2016-00546, CR-ANO-C-2016-0948, and CR-ANO-C-2016-01348. The failure to establish operational decision making issue guidance per procedure EN-OP-111 to address safety injection tank check valve 2SI-13D leakage was a performance deficiency. The performance deficiency was determined to be more than minor because it was associated with the equipment reliability 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 leak became an operational challenge, in that, operators were filling the safety injection tank for the majority of the shift. 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 it did not represent an actual loss of function of at least a single train for greater than its technical specification allowed outage time, and did not involve the loss or degradation of equipment or function specifically designed to mitigate a seismic, flooding, or severe weather initiating event. This finding had a problem identification and resolution cross-cutting aspect of Self-Assessment because the licensee did not conduct self-critical and objective reviews of degraded plant issue to determine whether they should be addressed using the operational decision making issue process [P.6]. |
Site: | Arkansas Nuclear ![]() |
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Report | IR 05000368/2016007 Section 4OA4 |
Date counted | Mar 31, 2016 (2016Q1) |
Type: | Finding: 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 |
CCA | P.6, Self-Assessment |
INPO aspect | CL.2 |
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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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