05000400/FIN-2011008-10
From kanterella
Jump to navigation
Jump to search
Finding | |
---|---|
Title | Failure to Establish Adequate Preventative Maintenance Procedure for Safety-Related Tornado Dampers |
Description | The team identified a Green, NCV of TS 6.8.1 for the failure to implement an adequate preventative maintenance procedure to ensure reliable operation of the plants safety-related tornado dampers. Immediate corrective actions included procedure changes, testing of all dampers, and necessary corrective maintenance. In addition, the licensee submitted LER 2011-001 to address a discovered inoperable damper. Additional corrective actions are still being evaluated by the licensee. The licensee entered this issue into the CAP as NCRs 457949 and 458237. The licensees failure to implement an adequate preventative maintenance procedure to ensure reliable operation of the plants safety-related tornado dampers was a performance deficiency. This finding was more than minor because it affected the Mitigating Systems Cornerstone objective of ensuring the availability, reliability, and capability of the safety-related ventilation system to respond to initiating events to prevent undesirable consequences and the cornerstone attribute of Protection against External Events, i.e. seismic, weather. Specifically, the failure of the dampers to function properly would impact the ability to maintain required ventilation during an external event. The inspectors assessed the finding using a Phase I SDP screening which determined a Phase III SDP evaluation was required due to the fact that the finding involved the loss or degradation of equipment specifically designed to mitigate a severe weather initiating event (e.g., tornado doors). A Phase III SDP evaluation was performed in accordance with NRC Inspection Manual Chapter 0609 Appendix A by a regional SRA using the NRC SPAR model. The analysis determined that the performance deficiency resulted in a core damage frequency (CDF) risk increase less than 1E-6/year. Therefore, the finding was characterized as having very low safety significance. The team determined that no cross cutting aspect was applicable to this performance deficiency because this finding was not indicative of current licensee performance. |
Site: | Harris |
---|---|
Report | IR 05000400/2011008 Section 1R21 |
Date counted | Jun 30, 2011 (2011Q2) |
Type: | NCV: |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21 |
Inspectors (proximate) | S Walker C Baron G Skinner P Higgins D Mas-Penaranda R Patterson B Desai D Terri-Ward |
INPO aspect | |
' | |
Finding - Harris - IR 05000400/2011008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Harris) @ 2011Q2
Self-Identified List (Harris)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||