Event Notification Report for August 20, 2020
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/19/2020 - 08/20/2020
EVENT NUMBERS
54847
Power Reactor
Event Number: 54847
Facility: Turkey Point
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: Christopher Trent
HQ OPS Officer: Bethany Cecere
Region: 2 State: FL
Unit: [3] [] []
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: Christopher Trent
HQ OPS Officer: Bethany Cecere
Notification Date: 08/21/2020
Notification Time: 03:12 [ET]
Event Date: 08/20/2020
Event Time: 23:54 [EDT]
Last Update Date: 08/21/2020
Notification Time: 03:12 [ET]
Event Date: 08/20/2020
Event Time: 23:54 [EDT]
Last Update Date: 08/21/2020
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):
MARK MILLER (R2DO)
MARK MILLER (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 3 | M/R | Y | 34 | Power Operation | 0 | Hot Standby |
MANUAL REACTOR TRIP DUE TO STEAM GENERATOR WATER LEVEL CONTROL
"On 08/20/20 at 2354 [EDT], with Unit 3 in Mode 1 at approximately 34% RTP [Rated Thermal Power], the reactor was manually tripped. This was due to Steam Generator Water Level control issues that resulted in the only Steam Generator [S/G] Feed Pump tripping on low suction pressure. Unit 3 reactor was tripped manually upon the loss of the last running feed pump. All other systems operated normally. Auxiliary Feedwater initiated as designed to provide S/G water level control. EOPs have been exited and General Operating Procedures (GOPs) were entered. Unit 3 is stable in Mode 3 at normal operating temperature and pressure.
"This event is being reported pursuant to 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR 50.72(b)(3)(iv)(A)
"The NRC Resident Inspector bas been notified."
Decay heat removal is by the steam dumps to atmosphere. Unit 4 is not affected. The cause of the low suction feed pressure to the steam generator feed pump is under investigation.
"On 08/20/20 at 2354 [EDT], with Unit 3 in Mode 1 at approximately 34% RTP [Rated Thermal Power], the reactor was manually tripped. This was due to Steam Generator Water Level control issues that resulted in the only Steam Generator [S/G] Feed Pump tripping on low suction pressure. Unit 3 reactor was tripped manually upon the loss of the last running feed pump. All other systems operated normally. Auxiliary Feedwater initiated as designed to provide S/G water level control. EOPs have been exited and General Operating Procedures (GOPs) were entered. Unit 3 is stable in Mode 3 at normal operating temperature and pressure.
"This event is being reported pursuant to 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR 50.72(b)(3)(iv)(A)
"The NRC Resident Inspector bas been notified."
Decay heat removal is by the steam dumps to atmosphere. Unit 4 is not affected. The cause of the low suction feed pressure to the steam generator feed pump is under investigation.