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The following is a summary of information … The following is a summary of information provided by the licensee via phone and email:</br>On October 21, 2025, at 0610 CDT, while reloading fuel to the reactor vessel, an electrical perturbation initiated a control room ventilation isolation signal (CRVIS). The control room air conditioning system (CRACS) 'A' train A/C unit did not start upon the CRVIS due to a blown fuse. The 'B' CRACS A/C unit was out of service for planned maintenance at the time. At 1020 CDT, the 'A' train CRACS A/C unit was returned to service. Both trains of the control room emergency ventilation system (CREVS) were inoperable for 10 minutes. Due to both trains of CRACS and CREVS being inoperable, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v).</br>This condition caused entry into technical specification (TS) limiting condition for operation (LCO) 3.7.10 condition `E' and 3.7.11 condition `D'. Upon discovery of the condition, fuel movement and core alterations were suspended in accordance with the TS LCO required actions.</br>There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector was notified.. The NRC Resident Inspector was notified. +
11:10:00, 21 October 2025 +
14:37:00, 21 October 2025 +
11:10:00, 21 October 2025 +
The following is a summary of information … The following is a summary of information provided by the licensee via phone and email:</br>On October 21, 2025, at 0610 CDT, while reloading fuel to the reactor vessel, an electrical perturbation initiated a control room ventilation isolation signal (CRVIS). The control room air conditioning system (CRACS) 'A' train A/C unit did not start upon the CRVIS due to a blown fuse. The 'B' CRACS A/C unit was out of service for planned maintenance at the time. At 1020 CDT, the 'A' train CRACS A/C unit was returned to service. Both trains of the control room emergency ventilation system (CREVS) were inoperable for 10 minutes. Due to both trains of CRACS and CREVS being inoperable, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v).</br>This condition caused entry into technical specification (TS) limiting condition for operation (LCO) 3.7.10 condition `E' and 3.7.11 condition `D'. Upon discovery of the condition, fuel movement and core alterations were suspended in accordance with the TS LCO required actions.</br>There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector was notified.. The NRC Resident Inspector was notified. +
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00:00:00, 21 October 2025 +
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11:20:06, 23 October 2025 +
14:37:00, 21 October 2025 +
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11:10:00, 21 October 2025 +
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