Event Notification Report for March 10, 2021
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/09/2021 - 03/10/2021
Power Reactor
Event Number: 55132
Facility: Quad Cities
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: Derek Drockelman
HQ OPS Officer: Brian Lin
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: Derek Drockelman
HQ OPS Officer: Brian Lin
Notification Date: 03/10/2021
Notification Time: 18:26 [ET]
Event Date: 03/10/2021
Event Time: 16:23 [CST]
Last Update Date: 03/10/2021
Notification Time: 18:26 [ET]
Event Date: 03/10/2021
Event Time: 16:23 [CST]
Last Update Date: 03/10/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(xi) - Offsite Notification
10 CFR Section:
50.72(b)(2)(xi) - Offsite Notification
Person (Organization):
KOZAK, LAURA (R3)
KOZAK, LAURA (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 85 | Power Operation | 85 | Power Operation |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
EN Revision Imported Date: 4/9/2021
EN Revision Text: NOTIFICATION OF ENVIRONMENTAL REPORT TO ANOTHER GOVERNMENT AGENCY
"On March 10, 2021, Exelon reported an unpermitted release of a radionuclide (i.e., tritium) into the groundwater within the site boundary at Quad Cities Nuclear Power Station to the Illinois Environmental Protection Agency (IEPA) and the Illinois Emergency Management Agency (IEMA) in accordance with Illinois state regulations. There has been no detection of the release beyond the site boundary. The suspected source for the increased groundwater tritium levels is an onsite water storage tank or pipe; however, an investigation is in progress and the exact cause and source is not yet known. The increase in groundwater tritium concentration does not exceed any NRC regulations or reporting criteria. This notification is being made solely as a four-hour, non-emergency notification for a Notification of Other Government Agency.
"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: NOTIFICATION OF ENVIRONMENTAL REPORT TO ANOTHER GOVERNMENT AGENCY
"On March 10, 2021, Exelon reported an unpermitted release of a radionuclide (i.e., tritium) into the groundwater within the site boundary at Quad Cities Nuclear Power Station to the Illinois Environmental Protection Agency (IEPA) and the Illinois Emergency Management Agency (IEMA) in accordance with Illinois state regulations. There has been no detection of the release beyond the site boundary. The suspected source for the increased groundwater tritium levels is an onsite water storage tank or pipe; however, an investigation is in progress and the exact cause and source is not yet known. The increase in groundwater tritium concentration does not exceed any NRC regulations or reporting criteria. This notification is being made solely as a four-hour, non-emergency notification for a Notification of Other Government Agency.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified."
Power Reactor
Event Number: 55240
Facility: LaSalle
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: Jeffery Nugent
HQ OPS Officer: Thomas Herrity
Region: 3 State: IL
Unit: [1] [2] []
RX Type: [1] GE-5,[2] GE-5
NRC Notified By: Jeffery Nugent
HQ OPS Officer: Thomas Herrity
Notification Date: 05/06/2021
Notification Time: 17:05 [ET]
Event Date: 03/10/2021
Event Time: 08:15 [CDT]
Last Update Date: 05/10/2021
Notification Time: 17:05 [ET]
Event Date: 03/10/2021
Event Time: 08:15 [CDT]
Last Update Date: 05/10/2021
Emergency Class: Non Emergency
10 CFR Section:
50.73(a)(1) - Invalid Specif System Actuation
10 CFR Section:
50.73(a)(1) - Invalid Specif System Actuation
Person (Organization):
ORLIKOWSKI, ROBERT (R3)
ORLIKOWSKI, ROBERT (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 2 | N | N | 0 | Cold Shutdown | 100 | Power Operation |
EN Revision Imported Date: 6/10/2021
EN Revision Text: 60-DAY OPTIONAL TELEPHONIC NOTIFICATION OF AN INVALID SPECIFIED SYSTEM ACTUATION
"This telephone notification is provided in accordance with 10 CFR 50.73(a)(1) to report an invalid actuation of containment isolation valves in more than one system required by 10 CFR 50.73(a)(2)(iv)(A).
"On March 10, 2021, at 0815 [CST], during the Unit 2 Refueling Outage (L2R18), while performing a test to verify functionality of an isolation relay following replacement of the relay, a Group 4 isolation signal was actuated. The Group 4 isolation logic affects both the Reactor Building Ventilation (VR) and Containment Vent and Purge (VQ) system [for both units]. All equipment responded as designed to the Group 4 isolation, including startup of Standby Gas Treatment (SBGT) to maintain secondary containment pressure [for both units]. Investigation determined that the cause of the isolation was an inadvertent contact of the self-retracting grip jumper between two adjacent terminals that caused a short to ground and a blown fuse during the test performance. The fuse was replaced and systems restored as needed for the plant condition.
"The containment isolation was not due to actual plant conditions or parameters meeting design criteria for containment isolation. Therefore, this is considered an invalid actuation.
"The NRC Resident Inspector has been informed of this notification."
EN Revision Text: 60-DAY OPTIONAL TELEPHONIC NOTIFICATION OF AN INVALID SPECIFIED SYSTEM ACTUATION
"This telephone notification is provided in accordance with 10 CFR 50.73(a)(1) to report an invalid actuation of containment isolation valves in more than one system required by 10 CFR 50.73(a)(2)(iv)(A).
"On March 10, 2021, at 0815 [CST], during the Unit 2 Refueling Outage (L2R18), while performing a test to verify functionality of an isolation relay following replacement of the relay, a Group 4 isolation signal was actuated. The Group 4 isolation logic affects both the Reactor Building Ventilation (VR) and Containment Vent and Purge (VQ) system [for both units]. All equipment responded as designed to the Group 4 isolation, including startup of Standby Gas Treatment (SBGT) to maintain secondary containment pressure [for both units]. Investigation determined that the cause of the isolation was an inadvertent contact of the self-retracting grip jumper between two adjacent terminals that caused a short to ground and a blown fuse during the test performance. The fuse was replaced and systems restored as needed for the plant condition.
"The containment isolation was not due to actual plant conditions or parameters meeting design criteria for containment isolation. Therefore, this is considered an invalid actuation.
"The NRC Resident Inspector has been informed of this notification."