An NRC identified Green non-cited violation of McGuires Selected Licensing Commitment 16.9.5, Fire Rated Assemblies was identified for the licensees inadequate implementation of modifications that resulted in nonfunctional fire doors. The licensee has entered the finding into the corrective action program as
PIP M-13- 01454, declared the doors as nonfunctional and implemented fire watches for the fire areas of concern. The licensees inadequate implementation of fire door modifications that resulted in the failure to meet the requirements of Selected Licensee Commitment 16.9.5, Fire Rated Assemblies, was a performance deficiency. The performance deficiency was more than minor because it adversely affected the
Mitigating Systems cornerstone attribute of Protection Against External Events. Specifically, the welding modifications performed on nine fire doors adversely affected their capability to provide the required 3-hours of fire resistance. In accordance with NRC
IMC 0609 Appendix F, Part 1; Fire Protection
Significance Determination Process Phase 1 Worksheet the inspectors determined the finding to be of very low safety significance (Green) because the fire doors would still provide a minimum of 20 minutes fire endurance protection A cross-cutting aspect was not assigned because the performance deficiency does not reflect current licensee performance.
