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At 0632 EDT on October 5, 2021, with Unit … At 0632 EDT on October 5, 2021, with Unit 2 in Mode 1 at approximately 90 percent power for an end of cycle coastdown, the reactor automatically tripped due to an unexpected unblocking of the low power trip logic. The trip was not complex, with all systems responding normally post-trip. There was no equipment inoperable prior to the event that contributed to the reactor trip or adversely impacted plant response. The Auxiliary Feedwater System automatically started as designed in response to the reactor trip. Operations responded and stabilized the plant. Decay heat is being removed by discharging steam to the main condenser using the condenser steam dump valves.</br>Beaver Valley Power Station Unit 1 is unaffected and remains at 100 percent power in Mode 1.</br>Due to the Reactor Protection System actuation while critical, this event is being reported as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B). Additionally, the automatic actuation of the Auxiliary Feedwater System is being reported as an eight hour, non-emergency Specific System Actuation per 10 CFR 50.72(b)(3)(iv)(A).</br>There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
10:32:00, 5 October 2021 +
10:07:00, 5 October 2021 +
10:32:00, 5 October 2021 +
At 0632 EDT on October 5, 2021, with Unit … At 0632 EDT on October 5, 2021, with Unit 2 in Mode 1 at approximately 90 percent power for an end of cycle coastdown, the reactor automatically tripped due to an unexpected unblocking of the low power trip logic. The trip was not complex, with all systems responding normally post-trip. There was no equipment inoperable prior to the event that contributed to the reactor trip or adversely impacted plant response. The Auxiliary Feedwater System automatically started as designed in response to the reactor trip. Operations responded and stabilized the plant. Decay heat is being removed by discharging steam to the main condenser using the condenser steam dump valves.</br>Beaver Valley Power Station Unit 1 is unaffected and remains at 100 percent power in Mode 1.</br>Due to the Reactor Protection System actuation while critical, this event is being reported as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B). Additionally, the automatic actuation of the Auxiliary Feedwater System is being reported as an eight hour, non-emergency Specific System Actuation per 10 CFR 50.72(b)(3)(iv)(A).</br>There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified. +
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