05000390/FIN-2010007-01
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Finding | |
|---|---|
| Title | Use of Omas Potentially Not Consistent with the Fire Protection Licensing Basis |
| Description | The inspectors opened an unresolved issue (URI) pending NRC review of recently-received requested information related to questions regarding the licensee compliance with all provisions of their approved FPP. Specifically, the inspectors requested information regarding the licensees reliance and use of post-fire OMAs that may have not been approved by the NRC in SSERs 18 or 19. In SSER 18, the NRC approved certain post-fire OMAs used to compensate for fire-induced equipment failures. The licensee calculation WBN-OSG- 165, Rev. 5, Manual Actions Required for Safe Shutdown Following a Fire, which was referenced in SSER 18, section 3.5, identified OMAs credited for achieving and maintaining safe shutdown conditions for certain fire events. In this calculation, the licensee identified the OMAs which needed to be accomplished to achieve safe shutdown, established time requirements to accomplish these OMAs, and quantified expected completion times for performance of these OMAs. The licensee credited the use of Abnormal Operating Instruction (AOI 30.2) as its post-fire safe-shutdown procedure per SSER 18, section 3.5.1, Safe-Shutdown Procedures and Manpower. The inspectors identified at least two instances, one onsite and one in-office, where OMAs were not listed in the calculation WBN-OSG-165, Rev. 5. In the first instance, inspectors reviewed credited post-fire operator actions implemented in AOI 30.1, Plant Fires, Rev. 9, Step 5, and AOI 30.2, Fire Safe Shutdown, Rev. 27, Step 10. The inspectors found that these actions did not appear to have been analyzed in Rev. 5 of calculation WBN-OSG-165. Therefore, these OMAs may not have been reviewed and approved by the NRC. These actions were brought to the licensees attention October 6, 2010. The licensee provided an initial response to NRC questions related to these actions on October 7, 2010. Based upon NRC comments, the licensee provided additional information to the inspectors related to these OMAs on December 6, 2010. On December 22, 2010, based upon these responses and review of information, the NRC inspectors requested the licensee to provide a list of all OMAs implemented in lieu of meeting 10 CFR Part 50, Section III.G.2, after SSER 18 was issued, as well as the supporting analyses. After several conference calls, on April 5, 2011, the licensee provided a spreadsheet titled, Watts Bar Nuclear Plant Manual Operator Actions (MOAs) Developed For and After Revision 6 of Calculation WBN-OSG4-165 (06/30/1995). The licensee stated that information provided included the list of all OMAs implemented after issuance of SSER 18. The inspectors reviewed the information and found that the OMAs identified during the onsite portion of the inspection were not included, nor did the list include the associated evaluations. On April 15, 2011, as a result of NRC review and additional questions, the licensee stated that some of the OMAs they listed in their April 5, 2011, response were added June 6, 1995, before Rev. 5 of calculation WBN-OSG-165 and SSER 18 was issued. On a follow-up call to the license conducted June 13, 2011, licensee personnel stated the OMAs identified in AOI 30.1, Plant Fires, Rev. 9, Step 5, and AOI 30.2, Fire Safe Shutdown, Rev. 27, Step 10 were done so in response to NRC Information Notice (IN) 89-52, Potential Fire Damper Operational Problems. In the second instance, the inspectors identified seven OMAs which appeared to be added after WBN-OSG-165, Rev. 5. This was based upon the review of information provided to inspectors on April 5, 2011. The inspectors determined that Rev. 5 of calculation WBN-OSG-165 became effective May 3, 1995, and the seven OMAs were added June 30, 1995. On June 13, 2011, the inspectors conducted a follow-up call with the licensee and were provided additional information. Specifically, licensee personnel stated that the seven OMAs were added via a design change before SSER 18 was issued to the licensee in October 1995; however, were not included in calculation WBNOSG- 165. The licensee personnel stated these additional OMAs were added to the FPR in revisions 3 & 4. Pending review of this additional information, this issue will remain open as unresolved item (URI)05000390/2010007-001, Use of OMAs Potentially Not Consistent with the Fire Protection Licensing Basis. |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2010007 Section 1R05 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | N Staples G Wiseman R Fanner R Nease L Suggsj Dymekj Grant J Montgomery M Cummings O Lopez P Braxton S Shaeffer D Jones E Patterson G Wiseman |
| INPO aspect | |
| Finding closed by | |
| IR 05000390/2013615 (6 November 2013) | |
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Finding - Watts Bar - IR 05000390/2010007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2010Q4
Self-Identified List (Watts Bar)
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