ENS 55049

v t e ENS Event
18:35 Dec 24, 2020
Title	Automatic Turbine and Reactor Trip
Event Description	At 1235 CST on December 24, 2020, Callaway Plant was in Mode 1 at approximately 90 percent power when a turbine trip/reactor trip, from a vital main generator trip signal, occurred. All safety systems responded as expected with exception of an indication issue with the 'B' Feedwater Isolation Valve, which was confirmed closed, and one intermediate range nuclear instrumentation channel which failed off-scale low following the trip. A valid Feedwater Isolation Signal and Auxiliary Feedwater Actuation Signal were also received as a result of the plant trip. The plant is being maintained stable in Mode 3. All control rods fully inserted from the reactor trip signal, and decay heat is being removed via the Auxiliary Feedwater and Steam Dump Systems. The NRC Senior Resident Inspector was notified.

ENS 55049 +/-
Where
Callaway Missouri (NRC Region 4)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
Time - Person (Reporting Time:+-2.35 h-0.0979 days <br />-0.014 weeks <br />-0.00322 months <br />)
Opened:	John Lauf 16:14 Dec 24, 2020
NRC Officer:	Andrew Waugh
Last Updated:	Dec 24, 2020
55049 - NRC Website
v • d • e

v t e Emergency Notification System
Callaway with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR		Automatic Reactor Trip 2024-02-15T08:47:00 [Table view]
[ENS list for Callaway]

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