05000338/FIN-2012002-01
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Finding | |
|---|---|
| Title | Failure to Provide Required Power for the Seismic Instrumentation Annunciators |
| Description | An NRC-identified, Green, finding (FIN) was identified by the inspectors for the licensees failure to provide continuous standby power and sufficient power for a minimum 25 minutes of system operation for seismic instruments as required by a licensee self-imposed standard documented in the licensees Updated Final Safety Analysis Report (UFSAR) which resulted in required seismic alarms and indications not being received in the main control room. Specifically, the licensee failed to provide the required power for both a triaxial response-spectrum recorder capable of providing signals for immediate control room indication and for the control room annunciator for the seismic switch. The licensee entered this issue into their corrective action program as CR468442. Immediately following the August 23, 2011 seismic event the licensee completed a temporary modification to connect an uninterruptible power supply to the seismic monitoring panel. In addition, the licensee is executing a design change to upgrade the site seismic monitoring equipment. The inspectors reviewed IMC 0612, Appendix B and determined that the performance deficiency was more than minor because it adversely impacted the Design Control attribute of the Mitigating Systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors reviewed IMC0609, Attachment 4 and determined that the finding was of very low safety significance, Green, because it did not screen as potentially risk significant using the seismic screening criteria contained in Attachment 4. The cause of this finding did not involve a cross-cutting aspect as it is not indicative of current licensee performance. |
| Site: | North Anna  |
|---|---|
| Report | IR 05000338/2012002 Section 4OA5 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | G Kolcum G Mccoy J Reece J Rivera K Schaaf L Lake M Levine M Meeks R Clagg R Hamilton R Kellner W Pursley |
| INPO aspect | |
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Finding - North Anna - IR 05000338/2012002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (North Anna) @ 2012Q1
Self-Identified List (North Anna)
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