Event Notification Report for September 22, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/21/2025 - 09/22/2025
Power Reactor
Event Number: 57941
Facility: Davis Besse
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] B&W-R-LP
NRC Notified By: Jacob Kennedy
HQ OPS Officer: Ian Howard
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] B&W-R-LP
NRC Notified By: Jacob Kennedy
HQ OPS Officer: Ian Howard
Notification Date: 09/22/2025
Notification Time: 16:53 [ET]
Event Date: 09/22/2025
Event Time: 10:30 [EDT]
Last Update Date: 09/22/2025
Notification Time: 16:53 [ET]
Event Date: 09/22/2025
Event Time: 10:30 [EDT]
Last Update Date: 09/22/2025
Emergency Class: Non Emergency
10 CFR Section:
26.719 - Fitness For Duty
10 CFR Section:
26.719 - Fitness For Duty
Person (Organization):
Szwarc, Dariusz (R3DO)
FFD Group, (EMAIL)
Szwarc, Dariusz (R3DO)
FFD Group, (EMAIL)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
PROHIBITIED SUBSTANCE DISCOVERED WITHIN THE PROTECTED AREA
The following information was provided by the licensee via phone and email:
"At approximately 1030 EDT on September 22, 2025, it was determined an employee had an unopened bottle of beer inside the protected area on September 20, 2025. The individual's authorization for site access has been restricted, pending the results of an investigation."
The NRC Resident Inspector and the NRC Region III Security Inspector have been notified.
The following information was provided by the licensee via phone and email:
"At approximately 1030 EDT on September 22, 2025, it was determined an employee had an unopened bottle of beer inside the protected area on September 20, 2025. The individual's authorization for site access has been restricted, pending the results of an investigation."
The NRC Resident Inspector and the NRC Region III Security Inspector have been notified.
Power Reactor
Event Number: 57942
Facility: Watts Bar
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Sean Lorson
HQ OPS Officer: Ernest West
Region: 2 State: TN
Unit: [1] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Sean Lorson
HQ OPS Officer: Ernest West
Notification Date: 09/23/2025
Notification Time: 11:58 [ET]
Event Date: 09/22/2025
Event Time: 15:00 [EDT]
Last Update Date: 09/23/2025
Notification Time: 11:58 [ET]
Event Date: 09/22/2025
Event Time: 15:00 [EDT]
Last Update Date: 09/23/2025
Emergency Class: Non Emergency
10 CFR Section:
26.719 - Fitness For Duty
10 CFR Section:
26.719 - Fitness For Duty
Person (Organization):
Stamm, Eric (R2DO)
FFD Group, (EMAIL)
Stamm, Eric (R2DO)
FFD Group, (EMAIL)
| 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 | Y | 100 | Power Operation | 100 | Power Operation |
FITNESS FOR DUTY EVENT
The following information was provided by the licensee via phone and email:
"On 9/22/25, Watts Bar Nuclear (WBN) Operations was informed that a WBN licensed operator had tested positive for a controlled substance during a pre-screening test to regain unescorted access, in violation of the Tennessee Valley Authority (TVA) fitness for duty policy.
"A pre-access screening was completed on 9/16/25 to regain unescorted access. The results were sent to the TVA medical review officer on 9/22/25. The test was declared positive for a controlled substance and WBN Operations was notified at 1500 EDT on 9/22/25.
"The individual's unescorted access remains revoked.
"The NRC Resident Inspector has been notified."
The following information was provided by the licensee via phone and email:
"On 9/22/25, Watts Bar Nuclear (WBN) Operations was informed that a WBN licensed operator had tested positive for a controlled substance during a pre-screening test to regain unescorted access, in violation of the Tennessee Valley Authority (TVA) fitness for duty policy.
"A pre-access screening was completed on 9/16/25 to regain unescorted access. The results were sent to the TVA medical review officer on 9/22/25. The test was declared positive for a controlled substance and WBN Operations was notified at 1500 EDT on 9/22/25.
"The individual's unescorted access remains revoked.
"The NRC Resident Inspector has been notified."
Agreement State
Event Number: 58005
Rep Org: New York City Bureau of Rad Health
Licensee: Memorial Sloan Kettering Cancer Center
Region: 1
City: New York State: NY
County:
License #: 75-2968-01
Agreement: Y
Docket:
NRC Notified By: Erik Finkelstein
HQ OPS Officer: Ian Howard
Licensee: Memorial Sloan Kettering Cancer Center
Region: 1
City: New York State: NY
County:
License #: 75-2968-01
Agreement: Y
Docket:
NRC Notified By: Erik Finkelstein
HQ OPS Officer: Ian Howard
Notification Date: 10/23/2025
Notification Time: 11:45 [ET]
Event Date: 09/22/2025
Event Time: 00:00 [EDT]
Last Update Date: 10/23/2025
Notification Time: 11:45 [ET]
Event Date: 09/22/2025
Event Time: 00:00 [EDT]
Last Update Date: 10/23/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Young, Matt (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Young, Matt (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - MEDICAL EVENT
The following is a summary of information received from the New York City Department of Health via email:
Memorial Sloan Kettering Cancer Center reported a Y-90 TheraSphere treatment to one site in the liver out of four resulting in 20.7 percent less dose than intended. The planned dose to the treatment site was 235 Gy; only 187 Gy was delivered.
The treatment involved four vials to be used. Two of the vials were mistakenly switched during the treatment, resulting in the incorrect dose to one location. The patient was informed.
New York item number: NY250006
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 is a summary of information received from the New York City Department of Health via email:
Memorial Sloan Kettering Cancer Center reported a Y-90 TheraSphere treatment to one site in the liver out of four resulting in 20.7 percent less dose than intended. The planned dose to the treatment site was 235 Gy; only 187 Gy was delivered.
The treatment involved four vials to be used. Two of the vials were mistakenly switched during the treatment, resulting in the incorrect dose to one location. The patient was informed.
New York item number: NY250006
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.