05000305/FIN-2011004-05
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Finding | |
|---|---|
| Title | Misapplication of Technical Specification 3.1.6 Applicability Note |
| Description | A finding of very low safety significance and associated non-cited violation of Technical Specification (TS) 3.1.6, Control Bank Insertion Limits, was identified by the inspectors for the failure to comply with TS action condition 3.1.6.A due to incorrect use of the applicability note. Specifically, on August 30, 2011, during the performance of SP-49-075, Control Rod Exercise, operators received a rod control urgent failure while inserting control bank A group 1 control rods. The test was suspended for troubleshooting for approximately 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> with control bank A group 2 control rods, inserted one step below the control rod insertion limit in violation of TS 3.1.6.A action condition. The inspectors concluded that, once the test was suspended for troubleshooting activities, use of the applicability note was not appropriate; therefore, the operators should have complied with the TS 3.1.6.A action condition for control bank A group 2 control rods at that time. On August 31, operators withdrew control bank A group 2 rods one step, which restored the rods to within the limit specified in the core operating limits report. At the end of this inspection period, the licensee was still performing an apparent cause evaluation to determine the causes of the event and to develop corrective actions. The finding was determined to be more than minor because the finding adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent desirable consequences. Specifically, the human performance attributes of the licensees failure to recognize the misapplication of the applicability note of the TS affected the capability of systems that respond to initiating events. The inspectors screened the finding as having very low safety significance (Green) because an actual loss of safety function did not occur. The finding has a cross-cutting aspect in the area of human performance, decision-making, because the licensee failed to use conservative assumptions and adopt a requirement to demonstrate that the proposed action is safe in order to proceed rather than a requirement to demonstrate that it is unsafe in order to disapprove the action |
| Site: | Kewaunee  |
|---|---|
| Report | IR 05000305/2011004 Section 1R22 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.22 |
| Inspectors (proximate) | M Kunowski R Krsek K Barclay R Edwards L Rodriguez |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Kewaunee - IR 05000305/2011004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Kewaunee) @ 2011Q3
Self-Identified List (Kewaunee)
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