05000482/FIN-2011004-08
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Title 10 CFR, Part 50, Appendix B, Criterion III, Design Control, requires, in part, that measures shall be established to assure that applicable regulatory requirements and the design basis, are correctly translated into specifications, drawings, procedures, and instructions. Contrary to the above, on July 21, 2010, Wolf Creek did not translate the inadvertent safety injection safety analysis into procedures. Specifically, pressurizer level exceeded the initial conditions of plant safety analysis. This issue was identified by a Wolf Creek operations engineer and procedure writer. Wolf Creek USAR, Section 15.5.1, and safety analysis calculation AN-98-86 state that the initial condition of inadvertent operation of the emergency core cooling system is 57 percent pressurizer level. Operator action is necessary within 8 minutes to shut the boron injection tank valves. This prevents passing water through the pressurizer safety relief valves and escalating the event to a small break loss of coolant accident. Contrary to the above, from January 9, 2002, to January 25, 2011, Procedure GEN 00-005, Minimum Load to Hot Standby, Revisions 44 to 66, allowed pressurizer level up to 65 percent. Also, from December 14, 1994, to August 24, 2010, Procedure GEN 00-006, Hot Standby to Cold Shutdown, Revisions 28 to 73, allowed pressurizer levels up to 65 percent. This issue was determined to be of very low safety significance (Green) using a Phase 3 analysis because the maximum time the high water level condition existed was only nineteen hours. |
| Site: | Wolf Creek  |
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| Report | IR 05000482/2011004 Section 4OA7 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Peabody G Miller J Bashore L Carson L Willoughby N Makris S Alferink C Long |
| INPO aspect | |
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Finding - Wolf Creek - IR 05000482/2011004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2011Q3
Self-Identified List (Wolf Creek)
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