The inspectors identified a finding of very-low safety significance (Green), and associated Non-Cited Violation (
NCV) of Title 10 of the Code of Federal Regulations(CFR), Part 50.49(e)(5), Environmental Qualification of Electrical Equipment Important to Safety for Nuclear Power Plants, for the licensees failure to correctly establish maintenance/replacement frequency for Weed temperature transmitters installed in harsh environment. Specifically, Calculation EQ-115, Qualified Life Calculation for Weed RTD/RTDT and
TC Assemblies,incorrectly established a qualified life for Weed temperature transmitters installed in Zone
FB-7. The calculation determined that the qualified life for these transmitters in Zone
FB-7 as 18.9 years plus accident. However, the calculation failed to account for the accident time and temperature.