05000237/FIN-2010003-07
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Finding | |
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| Title | 2/3 Emergency Diesel Generator (EDG) Overvoltage during Division I Undervoltage |
| Description | A finding of very low safety significance (Green) and associated NCV of Title 10 of the Code of Federal Regulations, Part 50, Appendix B, Criterion XI, Test Control, was self-revealed on November 16, 2009, for the failure to perform adequate post-modification testing which allowed an improper wiring condition to exist for years before an inappropriate action by a nuclear station operator exposed the problem. The licensee generated issue report 994101 to address this issue. Corrective actions implemented by the licensee to address this issue included correcting the improper wiring configuration and creating a training request to have enhanced post-maintenance testing requirement training given to all plant engineers, design engineers and maintenance work planners. Using IMC 0612, Appendix B, Issue Screening, the inspectors determined that the finding was more than minor because it impacted the Mitigating Systems Cornerstone attribute of procedure quality to ensure the availability, reliability and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors completed a Phase 1 significance determination of this issue using IMC 0609, Attachment 0609.04, Phase 1 Initial Screening and Characterization of Findings. The inspectors answered "no" to all questions in the Mitigating Systems Cornerstone column of Table 4a, Characterization Worksheet for IE, MS, and BI Cornerstones. Therefore, the finding screened as Green (very low safety significance). Because the behavior leading to this event occurred in 1986, the inspectors determined that this event was not indicative of current performance and, therefore, no cross-cutting area was affected. |
| Site: | Dresden  |
|---|---|
| Report | IR 05000237/2010003 Section 4OA3 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | A Dunlop D Melendez -Colon W Slawinski C Phillips D Reeser B Palagi J Neurauter M Ring J Draper M Learn D Sand R Edwards R Jickling R Schulz J Tapp R Russel |
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Finding - Dresden - IR 05000237/2010003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Dresden) @ 2010Q2
Self-Identified List (Dresden)
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