Event Notification Report for March 21, 2021
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/20/2021 - 03/21/2021
EVENT NUMBERS
55147
55147
Power Reactor
Event Number: 55147
Facility: Calvert Cliffs
Region: 1 State: MD
Unit: [2] [] []
RX Type: [1] CE,[2] CE
NRC Notified By: Mark Watson
HQ OPS Officer: Jeffrey Whited
Region: 1 State: MD
Unit: [2] [] []
RX Type: [1] CE,[2] CE
NRC Notified By: Mark Watson
HQ OPS Officer: Jeffrey Whited
Notification Date: 03/21/2021
Notification Time: 23:57 [ET]
Event Date: 03/21/2021
Event Time: 22:16 [EDT]
Last Update Date: 03/22/2021
Notification Time: 23:57 [ET]
Event Date: 03/21/2021
Event Time: 22:16 [EDT]
Last Update Date: 03/22/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical 50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS Actuation - Critical 50.72(b)(3)(iv)(A) - Valid Specif Sys Actuation
Person (Organization):
CAHILL, CHRISTOPHER (R1)
CAHILL, CHRISTOPHER (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | M/R | N | 37 | Power Operation | 0 | Hot Standby |
EN Revision Imported Date: 4/20/2021
EN Revision Text: MANUAL REACTOR TRIP DUE TO LOWERING STEAM GENERATOR LEVEL
"At 2216 EDT on 3/21/2021, Calvert Cliffs Unit 2 was manually tripped from 37 percent power due to lowering level in the 21 Steam Generator. All systems responded per design. Main Feedwater was secured and Auxiliary Feedwater was manually initiated. The Site Senior Resident has been notified."
The cause of the lowering level in the 21 Steam Generator is under investigation.
EN Revision Text: MANUAL REACTOR TRIP DUE TO LOWERING STEAM GENERATOR LEVEL
"At 2216 EDT on 3/21/2021, Calvert Cliffs Unit 2 was manually tripped from 37 percent power due to lowering level in the 21 Steam Generator. All systems responded per design. Main Feedwater was secured and Auxiliary Feedwater was manually initiated. The Site Senior Resident has been notified."
The cause of the lowering level in the 21 Steam Generator is under investigation.