05000416/FIN-2011006-01
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Finding | |
|---|---|
| Title | Failure to Take Timely Corrective Actions for Reactor Core Isolation Cooling System Venting |
| Description | The team identified a Green noncited violation of 10 50 Appendix Criterion XVI, Corrective Actions, for the failure to promptly identify and correct an inadequate venting procedure for the reactor core isolation cooling system. Corrective actions were not taken in a timely enough manner such that resolution was reached prior to time to demonstrate the licensee met their applicable technical specification surveillance requirement. The licensee entered this condition into their corrective action program as condition report CR-GGN-2011-07669 and subsequently altered their procedure, which performs the technical specification surveillance requirement to demonstrate that it meets the applicable requirements. This finding is more than minor because it affects the procedure quality attribute of the mitigating systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, this finding was of very low safety significance because it did not create a loss of system safety function of a single train for greater than the technical specification allowed outage times, and did not affect seismic, flooding, or severe weather initiating events. This finding has a cross-cutting aspect in the area of human performance associated with the decision making component. The licensee did not use conservative assumptions when deciding to pursue corrective action for venting of the reactor core isolation cooling system piping to demonstrate their action was safe in order to proceed rather than demonstrating it was unsafe to disapprove the action. |
| Site: | Grand Gulf  |
|---|---|
| Report | IR 05000416/2011006 Section 4OA2 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Deese R Alexander B Rice J Watkins J Dykert C Speer |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
| ' | |
Finding - Grand Gulf - IR 05000416/2011006 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2011Q4
Self-Identified List (Grand Gulf)
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