05000341/FIN-2008006-01
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Finding | |
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Title | Failure to Ensure Air Supply Tubing for Safe Shutdown Valves Free of Fire Damage |
Description | A finding of very low safety significance and an associated Non-Cited Violation (NCV) of the Fermi 2 Facility Operating License Condition 2.C(9),for the fire protection program, was identified by the inspectors for the licensee failure to ensure that one redundant train of systems necessary to achieve and maintain hot shutdown conditions was free of fire damage during the process of implementing a plant modification. Specifically, the licensee failed to ensure that the air supply and its associated tubing for safe shutdown air operated valves T4901F468 and T4901F469 was free of fire damage for III.G.2 fire zones. The modification was lacking thorough review of the separation requirement specified in Appendix R. As a result, subsequent walkdown and analysis were required to verify that the air tubing associated with the above valves was not routed through the fire zone of concern. The finding was more than minor because it affected the mitigating systems cornerstone attribute of protection against external factors (fire) and it impacted the objective of the mitigating systems cornerstone. Specifically, spurious closure of the above air operated valves due to loss of air could have rendered the Division II SRVs inoperable and could have complicated plant safe shutdown. The finding was of very low safety significance because the inspectors answered no to all five questions under the Mitigating Systems Cornerstone Column of the Phase 1 worksheet |
Site: | Fermi |
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Report | IR 05000341/2008006 Section 1R05 |
Date counted | Jun 30, 2008 (2008Q2) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.05 |
Inspectors (proximate) | M Munir R Langstaff A Dahbur J Lara |
INPO aspect | |
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Finding - Fermi - IR 05000341/2008006 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Fermi) @ 2008Q2
Self-Identified List (Fermi)
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