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The following information was provided by The following information was provided by the licensee via email:</br>(On June 16, 2023,) at 1832 CDT, Unit 1 reactor automatically tripped on lo-lo level in the '1-04' steam generator (SG). Prior to the trip, the 1B (main feedwater pump) (MFP) tripped due to speed oscillations and a runback to 700MW was in progress. Both motor driven auxiliary feedwater pumps started due to the lo-lo level in SG '1-04'.</br>Unit 1 is being maintained in hot standby (Mode 3) in accordance with Integrated Plant Operating Procedure IPO-007A. The Emergency Response Guideline network has been exited. Decay heat is being rejected to the main condenser via the steam dump valves.</br>The licensee notified the NRC Resident Inspector.</br>The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:</br>Unit 1 is in a normal post-trip electrical line-up. There was no effect on Unit 2 due to the Unit 1 trip.o effect on Unit 2 due to the Unit 1 trip.  +
23:32:00, 16 June 2023  +
22:16:00, 16 June 2023  +
23:32:00, 16 June 2023  +
The following information was provided by The following information was provided by the licensee via email:</br>(On June 16, 2023,) at 1832 CDT, Unit 1 reactor automatically tripped on lo-lo level in the '1-04' steam generator (SG). Prior to the trip, the 1B (main feedwater pump) (MFP) tripped due to speed oscillations and a runback to 700MW was in progress. Both motor driven auxiliary feedwater pumps started due to the lo-lo level in SG '1-04'.</br>Unit 1 is being maintained in hot standby (Mode 3) in accordance with Integrated Plant Operating Procedure IPO-007A. The Emergency Response Guideline network has been exited. Decay heat is being rejected to the main condenser via the steam dump valves.</br>The licensee notified the NRC Resident Inspector.</br>The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:</br>Unit 1 is in a normal post-trip electrical line-up. There was no effect on Unit 2 due to the Unit 1 trip.o effect on Unit 2 due to the Unit 1 trip.  +
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00:00:00, 16 June 2023  +
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19:57:57, 4 January 2024  +
22:16:00, 16 June 2023  +
-0.0529 d (-1.27 hours, -0.00756 weeks, -0.00174 months)  +
23:32:00, 16 June 2023  +
Automatic Reactor Trip Due to LO-LO Steam Generator Level  +
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1  +