Event Notification Report for October 03, 2021
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/02/2021 - 10/03/2021
EVENT NUMBERS
55503
55503
Power Reactor
Event Number: 55503
Facility: Prairie Island
Region: 3 State: MN
Unit: [2] [] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: Jonathon Tepley
HQ OPS Officer: Thomas Herrity
Region: 3 State: MN
Unit: [2] [] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: Jonathon Tepley
HQ OPS Officer: Thomas Herrity
Notification Date: 10/03/2021
Notification Time: 22:38 [ET]
Event Date: 10/03/2021
Event Time: 15:25 [CDT]
Last Update Date: 10/03/2021
Notification Time: 22:38 [ET]
Event Date: 10/03/2021
Event Time: 15:25 [CDT]
Last Update Date: 10/03/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
10 CFR Section:
50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
Person (Organization):
KOZAK, LAURA (R3)
KOZAK, LAURA (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Cold Shutdown | 0 | Cold Shutdown |
EN Revision Imported Date: 11/4/2021
EN Revision Text: SPECIFIED SYSTEM ACTUATION
"At 1525 CDT, 10/3/2021, with Unit 2 in Mode 5 at 0 percent power for a refueling outage, the 22 Turbine-Driven Auxiliary Feedwater (AFW) pump received an actuation signal during preparations for an Integrated Safety Injection test. The reason for the actuation signal is under investigation. The AFW steam admission valve opened and then, due to plant conditions, received a trip signal due to low discharge pressure. The steam supplies to the TD AFW pump were isolated.
"This event is being reported in accordance with 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the AFW system. Unit 1 was not affected by this issue.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
EN Revision Text: SPECIFIED SYSTEM ACTUATION
"At 1525 CDT, 10/3/2021, with Unit 2 in Mode 5 at 0 percent power for a refueling outage, the 22 Turbine-Driven Auxiliary Feedwater (AFW) pump received an actuation signal during preparations for an Integrated Safety Injection test. The reason for the actuation signal is under investigation. The AFW steam admission valve opened and then, due to plant conditions, received a trip signal due to low discharge pressure. The steam supplies to the TD AFW pump were isolated.
"This event is being reported in accordance with 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the AFW system. Unit 1 was not affected by this issue.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."