05000416/FIN-2012004-03
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Title 10 CFR 50.65(a)(4), states, in part, that before performing maintenance activities (including but not limited to surveillance, post maintenance testing, and corrective and preventive maintenance), the licensee shall assess and manage the increase in risk that may result from the proposed maintenance activities. Contrary to the above, before performing a certain maintenance activity, the licensee failed to assess and manage the increase in risk that may result from that activity. Specifically, on September 5, 2012, the licensee performed Surveillance Procedures 06-IC-1C61-R-0005, RCIC Turbine Speed Calibration, Revision 101, and 06-IC-1C11-Q-0003, Scram Discharge Volume High Water Level Float Switch Functional Test, Revision 103, concurrently without assessing and managing the increase in risk, which resulted in the unplanned occurrence of an Orange risk configuration. The licensee entered this issue into their corrective action program in Condition Report CR-GGN-2012-10454. The finding was more than minor because it was associated with the Initiating Events Cornerstone attribute of human error, and it affected the associated cornerstone objective to limit the likelihood of those events that upset plant stability and that challenge critical safety functions during power operations. Using Inspection Manual Chapter 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process, Flowchart 1, Assessment of Risk Deficit, and consulting with the regional senior risk analyst, the inspectors determined that finding has very low safety significance (Green) based on a licensees calculated determination of the incremental core damage probability deficit of 9.36E-11. Using the current revision of the plant-specific SPAR model, an NRC senior reactor analyst validated that result. |
| Site: | Grand Gulf  |
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| Report | IR 05000416/2012004 Section 4OA7 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | G Guerra R Smith J Laughlin A Fairbanks B Rice B Hagar |
| INPO aspect | |
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Finding - Grand Gulf - IR 05000416/2012004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2012Q3
Self-Identified List (Grand Gulf)
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