05000400/FIN-2012002-02
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Actions, states in part, measures shall be established to assure that conditions adverse to quality, such as failures, malfunctions, deficiencies, deviations, defective material and equipment, and non-conformances are promptly identified and corrected. Shearon Harris Nuclear Plant Unit One Technical Specifications (TS) 3.8.1, A.C. Sources, requires in part, that two separate and independent diesel generators shall be operable in modes 1, 2, 3 and 4. With one diesel generator inoperable the TS requires that the diesel generator be restored to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Contrary to the above, the licensee failed to promptly identify and correct the B EDG mechanical governor speed setting drift, a condition adverse to quality. The condition existed from April 2, 2011, to December 21, 2011. This resulted in the B EDG being inoperable for longer than the TS 3.8.1 Allowed Outage Time. The inspectors determined that an SDP Phase 2 analysis was required based on the finding representing an actual loss of safety function for a single train in excess of its TS allowed outage time. The Phase 2 analysis yielded a potential greater-than-green result and the issue was given to a Senior Reactor Analyst for a Phase 3 analysis to be performed. The Phase 3 analysis determined this issue to be of very low risk significance (i.e., Green) due to the low likelihood of events that could cause a sustained loss of offsite and onsite electrical power. Upon discovery of this violation the licensee put in place compensatory measures to ensure that the mechanical governor speed drift will not interfere with the electronic governor and plans to change the system for both the B and the A EDG. The licensee has entered the violation into their CAP as AR #505470. |
| Site: | Harris  |
|---|---|
| Report | IR 05000400/2012002 Section 4OA7 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | J Austin R Musser R Patterson P Lessard |
| INPO aspect | |
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Finding - Harris - IR 05000400/2012002 | |||||||||||||||||||||||||||||||||||||||||||
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Finding List (Harris) @ 2012Q1
Self-Identified List (Harris)
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