Event Notification Report for November 10, 2022
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/09/2022 - 11/10/2022
Power Reactor
Event Number: 56216
Facility: Cook
Region: 3 State: MI
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Ted Dey
HQ OPS Officer: Adam Koziol
Region: 3 State: MI
Unit: [2] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Ted Dey
HQ OPS Officer: Adam Koziol
Notification Date: 11/10/2022
Notification Time: 10:12 [ET]
Event Date: 11/10/2022
Event Time: 07:44 [EST]
Last Update Date: 11/10/2022
Notification Time: 10:12 [ET]
Event Date: 11/10/2022
Event Time: 07:44 [EST]
Last Update Date: 11/10/2022
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):
Dickson, Billy (R3DO)
Dickson, Billy (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | A/R | Y | 44 | Power Operation | 0 | Hot Standby |
AUTOMATIC REACTOR TRIP AND AUXILIARY FEEDWATER SYSTEM ACTUATION
The following information was provided by the licensee via email:
"At 0744 EST on November 10, 2022, DC Cook Unit 2 tripped automatically on high-high level of number 23 steam generator (SG). The reason for the high-high level in SG 23 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, and under 10 CFR 50.72(b)(3)(iv)(A), specified system actuation of the Auxiliary Feedwater System, as an eight (8) hour report. The DC Cook NRC Resident Inspector has been notified.
"Unit 2 is being supplied by offsite power. All control rods fully inserted. All Auxiliary Feedwater Pumps started properly. Decay heat is being removed via the Steam Dump System. Preliminary evaluation indicates all plant systems functioned normally following the reactor trip. DC Cook Unit 2 remains stable in Mode 3 while conducting the post trip review. No radioactive release is in progress as a result of this event."
The following information was provided by the licensee via email:
"At 0744 EST on November 10, 2022, DC Cook Unit 2 tripped automatically on high-high level of number 23 steam generator (SG). The reason for the high-high level in SG 23 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, and under 10 CFR 50.72(b)(3)(iv)(A), specified system actuation of the Auxiliary Feedwater System, as an eight (8) hour report. The DC Cook NRC Resident Inspector has been notified.
"Unit 2 is being supplied by offsite power. All control rods fully inserted. All Auxiliary Feedwater Pumps started properly. Decay heat is being removed via the Steam Dump System. Preliminary evaluation indicates all plant systems functioned normally following the reactor trip. DC Cook Unit 2 remains stable in Mode 3 while conducting the post trip review. No radioactive release is in progress as a result of this event."
Agreement State
Event Number: 56218
Rep Org: Arizona Dept of Health Services
Licensee: Banner University Medical Center
Region: 4
City: Tucson State: AZ
County:
License #: 10-044
Agreement: Y
Docket:
NRC Notified By: Brian Goretzki
HQ OPS Officer: Brian Lin
Licensee: Banner University Medical Center
Region: 4
City: Tucson State: AZ
County:
License #: 10-044
Agreement: Y
Docket:
NRC Notified By: Brian Goretzki
HQ OPS Officer: Brian Lin
Notification Date: 11/10/2022
Notification Time: 19:10 [ET]
Event Date: 11/10/2022
Event Time: 00:00 [MST]
Last Update Date: 11/10/2022
Notification Time: 19:10 [ET]
Event Date: 11/10/2022
Event Time: 00:00 [MST]
Last Update Date: 11/10/2022
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Azua, Ray (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Azua, Ray (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - PATIENT UNDERDOSE
The following information was received from the Arizona Department of Health Services (the Department) via email:
"On November 10, 2022, the Department received notification from the licensee about a medical event involving Y-90 Theraspheres. A patient was prescribed a dose of 150 Gy but was delivered 79.05 Gy, a percent dose delivered of 52.7 percent. The Department has requested additional information and continues to investigate the event."
Arizona Incident No. 22-014
A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.
The following information was received from the Arizona Department of Health Services (the Department) via email:
"On November 10, 2022, the Department received notification from the licensee about a medical event involving Y-90 Theraspheres. A patient was prescribed a dose of 150 Gy but was delivered 79.05 Gy, a percent dose delivered of 52.7 percent. The Department has requested additional information and continues to investigate the event."
Arizona Incident No. 22-014
A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.