Peach Bottom: EN Revision Text: AUTOMATIC REACTOR SCRAM DUE TO MANUAL TURBINE TRIP
EVENT REPORTS FOR
07/10/2024 - 07/11/2024
07/10/2024 - 07/11/2024
EVENT NUMBERS
Power Reactor
Event Number: 57221
Facility: Peach Bottom
Region: 1 State: PA
Unit: [2] [] []
RX Type: [2] GE-4,[3] GE-4
NRC Notified By: Gino Lombardo
HQ OPS Officer: Eric SimpsonNotification Date: 07/10/2024
Notification Time: 11:15 [ET]
Event Date: 07/10/2024
Event Time: 07:28 [EDT]
Last Update Date: 07/11/2024Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical
50.72(b)(3)(iv)(A) - Valid Specif Sys ActuationPerson (Organization):
Henrion, Mark (R1DO)
Region: 1 State: PA
Unit: [2] [] []
RX Type: [2] GE-4,[3] GE-4
NRC Notified By: Gino Lombardo
HQ OPS Officer: Eric SimpsonNotification Date: 07/10/2024
Notification Time: 11:15 [ET]
Event Date: 07/10/2024
Event Time: 07:28 [EDT]
Last Update Date: 07/11/2024Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical
50.72(b)(3)(iv)(A) - Valid Specif Sys ActuationPerson (Organization):
Henrion, Mark (R1DO)
|
Unit
|
SCRAM Code
|
RX Crit
|
Initial PWR
|
Initial RX Mode
|
Current PWR
|
Current RX Mode
|
|---|---|---|---|---|---|---|
|
2
|
A/R
|
Y
|
24
|
Power Operation
|
0
|
Hot Shutdown
|
Event Text
EN Revision Imported Date: 7/11/2024
EN Revision Text: AUTOMATIC REACTOR SCRAM DUE TO MANUAL TURBINE TRIP
The following information was provided by the licensee via phone and email:
"At 0728 EDT on July 10, 2024, with Unit 2 in Mode 1 at 24 percent power, the reactor automatically scrammed due to a manual turbine trip. The [reactor] scram was not complex with all systems responding normally. Reactor vessel level reached the low-level set-point following the scram, resulting in valid Group 2 and Group 3 containment isolation signals. 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) and an eight hour, non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) for the Group 2 and Group 3 isolations.
"Operations responded using emergency operating procedures and stabilized the plant in Mode 3. Decay heat is being removed by discharging steam to the main condenser using the turbine bypass valves. Unit 3 was not affected.
"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: AUTOMATIC REACTOR SCRAM DUE TO MANUAL TURBINE TRIP
The following information was provided by the licensee via phone and email:
"At 0728 EDT on July 10, 2024, with Unit 2 in Mode 1 at 24 percent power, the reactor automatically scrammed due to a manual turbine trip. The [reactor] scram was not complex with all systems responding normally. Reactor vessel level reached the low-level set-point following the scram, resulting in valid Group 2 and Group 3 containment isolation signals. 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) and an eight hour, non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) for the Group 2 and Group 3 isolations.
"Operations responded using emergency operating procedures and stabilized the plant in Mode 3. Decay heat is being removed by discharging steam to the main condenser using the turbine bypass valves. Unit 3 was not affected.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
Page Last Reviewed/Updated Thursday, July 11, 2024
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