Event Notification Report for October 12, 2020
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/11/2020 - 10/12/2020
Agreement State
Event Number: 54950
Rep Org: TENNESSEE DIV OF RAD HEALTH
Licensee: Energy Solutions
Region: 1
City: Oak Ridge State: TN
County:
License #: R-73008
Agreement: Y
Docket:
NRC Notified By: Andrew Holcomb
HQ OPS Officer: Ossy Font
Licensee: Energy Solutions
Region: 1
City: Oak Ridge State: TN
County:
License #: R-73008
Agreement: Y
Docket:
NRC Notified By: Andrew Holcomb
HQ OPS Officer: Ossy Font
Notification Date: 10/15/2020
Notification Time: 17:17 [ET]
Event Date: 10/12/2020
Event Time: 13:15 [EDT]
Last Update Date: 10/15/2020
Notification Time: 17:17 [ET]
Event Date: 10/12/2020
Event Time: 13:15 [EDT]
Last Update Date: 10/15/2020
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
DON JACKSON (R1DO)
JEFFERY GRANT (IRD)
ANDREA KOCK (DFM DD)
KEVIN WILLIAMS (MSST DD)
NMSS_EVENTS_NOTIFICATION (EMAIL)
DON JACKSON (R1DO)
JEFFERY GRANT (IRD)
ANDREA KOCK (DFM DD)
KEVIN WILLIAMS (MSST DD)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - UNPLANNED FIRE AND DOSE TO THE PUBLIC
The following was received from the state of Tennessee via email:
"Energy Solutions experienced a fire in the gas furnace 'Drum Drying Operation' of the Liquid Volume Reduction Facility (LVRF) building, which is a sub building off of the Incinerator building located at the 1560 Bear Creek Road, [Oak Ridge, TN] facility. The drums being processed contained Energy Solutions secondary waste with the following listed source term associated with the containers: C-14 (0.5 mCi), Co-60 (2.2 mCi), Cs-137 (0.96 mCi), Fe-55 (2 mCi), H-3 (4 Ci), and Tc-99 (98 mCi).
"Estimated 0.03 mrem dose to the public as a result of the event."
TN event number: TN-20-155
The following was received from the state of Tennessee via email:
"Energy Solutions experienced a fire in the gas furnace 'Drum Drying Operation' of the Liquid Volume Reduction Facility (LVRF) building, which is a sub building off of the Incinerator building located at the 1560 Bear Creek Road, [Oak Ridge, TN] facility. The drums being processed contained Energy Solutions secondary waste with the following listed source term associated with the containers: C-14 (0.5 mCi), Co-60 (2.2 mCi), Cs-137 (0.96 mCi), Fe-55 (2 mCi), H-3 (4 Ci), and Tc-99 (98 mCi).
"Estimated 0.03 mrem dose to the public as a result of the event."
TN event number: TN-20-155
Power Reactor
Event Number: 54944
Facility: Cook
Region: 3 State: MI
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Bud Hinckley
HQ OPS Officer: Brian Lin
Region: 3 State: MI
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Bud Hinckley
HQ OPS Officer: Brian Lin
Notification Date: 10/12/2020
Notification Time: 03:46 [ET]
Event Date: 10/12/2020
Event Time: 00:26 [EDT]
Last Update Date: 10/12/2020
Notification Time: 03:46 [ET]
Event Date: 10/12/2020
Event Time: 00:26 [EDT]
Last Update Date: 10/12/2020
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):
ROBERT ORLIKOWSKI (R3DO)
ROBERT ORLIKOWSKI (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | A/R | Y | 100 | Power Operation | 0 | Hot Standby |
AUTOMATIC REACTOR TRIP
"At 0026 [EDT] on October 12, 2020, D.C. Cook Unit 2 tripped automatically on low-low level of #24 steam generator which occurred after a lowering of main condenser vacuum.
"The reason for the lowering main condenser vacuum and the reason for the low steam generator #24 level is under investigation.
"This notification is being made in accordance with 10 CFR 50.72(b)(2)(iv)(B), Reactor Protection System (RPS) actuation as a four (4) hour report. Notification is also being made as an eight (8) hour report under 10 CFR 50.72(b)(3)(iv)(A) due to actuation of the Auxiliary Feedwater System (AFW).
"The D.C. Cook Resident NRC Inspector has been notified.
"Unit 2 is being supplied by offsite power. All control rods fully inserted. Auxiliary Feedwater Pumps started as required and are operating properly. Decay heat is being removed via steam generator power operated relief valves (PORVs) due to condenser steam dump unavailability from low main condenser vacuum. All four Reactor Coolant Pumps remain running. Preliminary evaluation indicates all plant systems functioned normally following the reactor trip. D.C. Cook Unit 2 remains stable in Mode 3. No radioactive release is in progress as a result of this event."
"At 0026 [EDT] on October 12, 2020, D.C. Cook Unit 2 tripped automatically on low-low level of #24 steam generator which occurred after a lowering of main condenser vacuum.
"The reason for the lowering main condenser vacuum and the reason for the low steam generator #24 level is under investigation.
"This notification is being made in accordance with 10 CFR 50.72(b)(2)(iv)(B), Reactor Protection System (RPS) actuation as a four (4) hour report. Notification is also being made as an eight (8) hour report under 10 CFR 50.72(b)(3)(iv)(A) due to actuation of the Auxiliary Feedwater System (AFW).
"The D.C. Cook Resident NRC Inspector has been notified.
"Unit 2 is being supplied by offsite power. All control rods fully inserted. Auxiliary Feedwater Pumps started as required and are operating properly. Decay heat is being removed via steam generator power operated relief valves (PORVs) due to condenser steam dump unavailability from low main condenser vacuum. All four Reactor Coolant Pumps remain running. Preliminary evaluation indicates all plant systems functioned normally following the reactor trip. D.C. Cook Unit 2 remains stable in Mode 3. No radioactive release is in progress as a result of this event."