Event Notification Report for June 27, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/26/2025 - 06/27/2025
Power Reactor
Event Number: 57789
Facility: Farley
Region: 2 State: AL
Unit: [2] [] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: Robert Contreras
HQ OPS Officer: Kerby Scales
Region: 2 State: AL
Unit: [2] [] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: Robert Contreras
HQ OPS Officer: Kerby Scales
Notification Date: 06/28/2025
Notification Time: 01:55 [ET]
Event Date: 06/27/2025
Event Time: 22:09 [CDT]
Last Update Date: 06/28/2025
Notification Time: 01:55 [ET]
Event Date: 06/27/2025
Event Time: 22:09 [CDT]
Last Update Date: 06/28/2025
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):
Blamey, Alan (R2DO)
Blamey, Alan (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | M/R | Y | 100 | Power Operation | 0 | Hot Standby |
MANUAL REACTOR TRIP AND AUTOMATIC ACTUATION OF AUXILIARY FEEDWATER SYSTEM
The following information was provided by the licensee via phone and email:
"On June 27, 2025, at 2209 CDT, with Unit 2 in mode 1 at 100 percent power, the reactor was manually tripped due to degrading condenser vacuum. The cause of the low vacuum is under investigation. All safety related systems responded normally post trip. Decay heat is being removed by atmospheric relief valves. Farley Unit 1 is not affected.
"An automatic actuation of auxiliary feedwater system occurred, which is an expected response from the reactor trip. Due to the reactor protection system actuation while critical, this event is being reported as a four-hour non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B) and an eight-hour non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the auxiliary feedwater system.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been informed."
The following information was provided by the licensee via phone and email:
"On June 27, 2025, at 2209 CDT, with Unit 2 in mode 1 at 100 percent power, the reactor was manually tripped due to degrading condenser vacuum. The cause of the low vacuum is under investigation. All safety related systems responded normally post trip. Decay heat is being removed by atmospheric relief valves. Farley Unit 1 is not affected.
"An automatic actuation of auxiliary feedwater system occurred, which is an expected response from the reactor trip. Due to the reactor protection system actuation while critical, this event is being reported as a four-hour non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B) and an eight-hour non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A) as an event that results in a valid actuation of the auxiliary feedwater system.
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been informed."
Agreement State
Event Number: 57788
Rep Org: Maryland Dept of the Environment
Licensee: Johns Hopkins Imaging, Bethesda
Region: 1
City: Bethesda State: MD
County:
License #: RAML #31-314-01
Agreement: Y
Docket:
NRC Notified By: Krishnakumar Nangeelil
HQ OPS Officer: Sam Colvard
Licensee: Johns Hopkins Imaging, Bethesda
Region: 1
City: Bethesda State: MD
County:
License #: RAML #31-314-01
Agreement: Y
Docket:
NRC Notified By: Krishnakumar Nangeelil
HQ OPS Officer: Sam Colvard
Notification Date: 06/27/2025
Notification Time: 17:50 [ET]
Event Date: 06/27/2025
Event Time: 12:49 [EDT]
Last Update Date: 08/11/2025
Notification Time: 17:50 [ET]
Event Date: 06/27/2025
Event Time: 12:49 [EDT]
Last Update Date: 08/11/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Arner, Frank (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Silberfeld, Dafna (NMSS)
Arner, Frank (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Silberfeld, Dafna (NMSS)
EN Revision Imported Date: 8/12/2025
EN Revision Text: AGREEMENT STATE REPORT - OVEREXPOSURE
The following information was provided by the Maryland Department of the Environment (MDE) via phone and email:
"On Friday, June 27, 2025, at 1249 EDT, MDE Program Manager received an email from the radiation safety officer (RSO) at Johns Hopkins University Radiation Control Unit, regarding a radiation overexposure incident involving a declared pregnant worker at the Johns Hopkins Bethesda PET facility.
"The RSO reported that a PET technician received the following radiation doses over the past three months:
"Fetal dose: 13.149 rem
"Whole body dose: 29.966 rem
"Extremity (ring) dose: 6329 rem
"Following the notification, the MDE contacted the RSO by phone to obtain additional details about the incident.
"The RSO explained that the employee's radiation exposure levels remained within acceptable limits until mid-March 2025. At that time, the technician began receiving higher-than-typical doses. The employee was informed when elevated exposure levels were initially observed in April 2025 dosimetry records.
"Upon reviewing the May 2025 dosimetry reports, the Radiation Control Office observed that the exposure levels were significantly elevated. As a result, the June 2025 dosimetry was expedited, which confirmed doses exceeding investigation thresholds. The employee was promptly notified of the dose results and was immediately removed from any work involving radioactive materials. The RSO has initiated a root cause investigation and will notify the MDE as required. This communication serves as a preliminary notification; MDE will follow up on the case and will provide further updates as appropriate."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The overexposure was limited to one worker as two other workers' dosimetry indicate normal exposures. It is unknown at this time what radiopharmaceutical was involved or if there is an indication of spread of contamination. MDE does plan to perform a reactive inspection.
* * * UPDATE ON 6/27/2025 AT 1858 EDT FROM KRISHNAKUMAR NANGEELIL TO SAMUEL COLVARD * * *
The following summary of information was provided by the Maryland Department of the Environment (MDE) via phone and email:
The facility and license number is Johns Hopkins Imaging, Bethesda (RAML #31-314-01). The radiopharmaceuticals used contains F-18 and G-68. MDE called the facility RSO and the RSO determined that there is no indication of a spill or spread of contamination at the facility.
Notified R1DO (Arner), NMSS Events (email), NMSS (Silberfeld).
* * * UPDATE ON 8/4/2025 AT 1400 EDT FROM KRISHNAKUMAR NANGEELIL TO JON LILLIENDAHL * * *
The following summary of information was provided by the Maryland Department of the Environment via email:
Following further investigation, the facility received updated dosimetry reports from their contractor. These values were confirmed through reanalysis using multiple instruments. Based on this reassessment, the originally reported doses were found to differ slightly from the earlier reported values. Specifically, the updated fetal dose is 14.790 rem.
Notified R1DO (Henrion), NMSS Events (email), NMSS (Allen).
* * * UPDATE ON 8/11/2025 AT 1607 EDT FROM MARTIN LODGE TO TENISHA MEADOWS * * *
The following summary of information was provided by the Maryland Department of the Environment via email:
The extremity (ring) dose is 6329 mrem (i.e. 1000 times lower), instead of 6329 rem.
Notified R1DO (Bickett), NMSS Events (email), NMSS (Fisher).
EN Revision Text: AGREEMENT STATE REPORT - OVEREXPOSURE
The following information was provided by the Maryland Department of the Environment (MDE) via phone and email:
"On Friday, June 27, 2025, at 1249 EDT, MDE Program Manager received an email from the radiation safety officer (RSO) at Johns Hopkins University Radiation Control Unit, regarding a radiation overexposure incident involving a declared pregnant worker at the Johns Hopkins Bethesda PET facility.
"The RSO reported that a PET technician received the following radiation doses over the past three months:
"Fetal dose: 13.149 rem
"Whole body dose: 29.966 rem
"Extremity (ring) dose: 6329 rem
"Following the notification, the MDE contacted the RSO by phone to obtain additional details about the incident.
"The RSO explained that the employee's radiation exposure levels remained within acceptable limits until mid-March 2025. At that time, the technician began receiving higher-than-typical doses. The employee was informed when elevated exposure levels were initially observed in April 2025 dosimetry records.
"Upon reviewing the May 2025 dosimetry reports, the Radiation Control Office observed that the exposure levels were significantly elevated. As a result, the June 2025 dosimetry was expedited, which confirmed doses exceeding investigation thresholds. The employee was promptly notified of the dose results and was immediately removed from any work involving radioactive materials. The RSO has initiated a root cause investigation and will notify the MDE as required. This communication serves as a preliminary notification; MDE will follow up on the case and will provide further updates as appropriate."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The overexposure was limited to one worker as two other workers' dosimetry indicate normal exposures. It is unknown at this time what radiopharmaceutical was involved or if there is an indication of spread of contamination. MDE does plan to perform a reactive inspection.
* * * UPDATE ON 6/27/2025 AT 1858 EDT FROM KRISHNAKUMAR NANGEELIL TO SAMUEL COLVARD * * *
The following summary of information was provided by the Maryland Department of the Environment (MDE) via phone and email:
The facility and license number is Johns Hopkins Imaging, Bethesda (RAML #31-314-01). The radiopharmaceuticals used contains F-18 and G-68. MDE called the facility RSO and the RSO determined that there is no indication of a spill or spread of contamination at the facility.
Notified R1DO (Arner), NMSS Events (email), NMSS (Silberfeld).
* * * UPDATE ON 8/4/2025 AT 1400 EDT FROM KRISHNAKUMAR NANGEELIL TO JON LILLIENDAHL * * *
The following summary of information was provided by the Maryland Department of the Environment via email:
Following further investigation, the facility received updated dosimetry reports from their contractor. These values were confirmed through reanalysis using multiple instruments. Based on this reassessment, the originally reported doses were found to differ slightly from the earlier reported values. Specifically, the updated fetal dose is 14.790 rem.
Notified R1DO (Henrion), NMSS Events (email), NMSS (Allen).
* * * UPDATE ON 8/11/2025 AT 1607 EDT FROM MARTIN LODGE TO TENISHA MEADOWS * * *
The following summary of information was provided by the Maryland Department of the Environment via email:
The extremity (ring) dose is 6329 mrem (i.e. 1000 times lower), instead of 6329 rem.
Notified R1DO (Bickett), NMSS Events (email), NMSS (Fisher).
Agreement State
Event Number: 57796
Rep Org: Georgia Radioactive Material Pgm
Licensee: Honeywell International Inc.
Region: 1
City: Duluth State: GA
County:
License #: GA 832-1
Agreement: Y
Docket:
NRC Notified By: Chelsea Parkerson
HQ OPS Officer: Tenisha Meadows
Licensee: Honeywell International Inc.
Region: 1
City: Duluth State: GA
County:
License #: GA 832-1
Agreement: Y
Docket:
NRC Notified By: Chelsea Parkerson
HQ OPS Officer: Tenisha Meadows
Notification Date: 07/02/2025
Notification Time: 15:16 [ET]
Event Date: 06/27/2025
Event Time: 00:00 [EDT]
Last Update Date: 08/19/2025
Notification Time: 15:16 [ET]
Event Date: 06/27/2025
Event Time: 00:00 [EDT]
Last Update Date: 08/19/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Carfang, Erin (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Carfang, Erin (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
EN Revision Imported Date: 8/20/2025
EN Revision Text: AGREEMENT STATE REPORT - RUPTURED SEALED SOURCE
The following information was provided by the Georgia Radioactive Materials Program Environmental Protection Division (the State) via email:
"On June 27, 2025, a krypton-85 sealed source capsule ruptured while unloading a Honeywell model 2201 series thickness gauge. The manufacturing engineer immediately turned on the fume hood and left the room when it was noticed the radiation monitors in the area rapidly increased in dose. It was determined the capsule had ruptured. The highest dose rate in the area of the source was 7 mR/h. The source was placed in the fume hood to allow gas to escape. The dose rate returned to normal approximately an hour after the source was placed in the fume hood. The dose rate at the source was then indistinguishable from background. The empty capsule was placed in a paint can containing cat litter and placed in their radiation source storage area.
"As a corrective action, all persons performing this activity have been retrained on loading and unloading the model 2201 source capsule, and regarding the importance of safety when unloading sealed source capsules containing [radioactive material].
"The thermoluminescent dosimeter badge of the manufacturing engineer will be sent to Landauer [the manufacturer] and the licensee will notify the State when they receive those results. Respirators are not utilized in their daily operations. The State will continue to investigate the incident and will follow up with new information."
Additional information on the sealed source:
Model: KAC.D5
Serial number: TW911
Activity: 14.8 GBq of krypton-85 as of December 2, 2011
* * * UPDATE ON 8/19/2025 AT 1321 EDT FROM CHELSEA PARKERSON TO TENISHA MEADOWS * * *
The following information was provided by the Georgia Radioactive Materials Program (RMP) via email:
"The licensee submitted the dosimetry report for the manufacturing engineer involved in the incident. The individual received a deep dose equivalent of 36 mrem for the monitoring period of April 1, 2025 - June 30, 2025. RMP considers the incident closed with no further follow up needed."
Notified R1DO (Dimitriadis) and NMSS Events Notification (email).
Georgia incident number: 101
EN Revision Text: AGREEMENT STATE REPORT - RUPTURED SEALED SOURCE
The following information was provided by the Georgia Radioactive Materials Program Environmental Protection Division (the State) via email:
"On June 27, 2025, a krypton-85 sealed source capsule ruptured while unloading a Honeywell model 2201 series thickness gauge. The manufacturing engineer immediately turned on the fume hood and left the room when it was noticed the radiation monitors in the area rapidly increased in dose. It was determined the capsule had ruptured. The highest dose rate in the area of the source was 7 mR/h. The source was placed in the fume hood to allow gas to escape. The dose rate returned to normal approximately an hour after the source was placed in the fume hood. The dose rate at the source was then indistinguishable from background. The empty capsule was placed in a paint can containing cat litter and placed in their radiation source storage area.
"As a corrective action, all persons performing this activity have been retrained on loading and unloading the model 2201 source capsule, and regarding the importance of safety when unloading sealed source capsules containing [radioactive material].
"The thermoluminescent dosimeter badge of the manufacturing engineer will be sent to Landauer [the manufacturer] and the licensee will notify the State when they receive those results. Respirators are not utilized in their daily operations. The State will continue to investigate the incident and will follow up with new information."
Additional information on the sealed source:
Model: KAC.D5
Serial number: TW911
Activity: 14.8 GBq of krypton-85 as of December 2, 2011
* * * UPDATE ON 8/19/2025 AT 1321 EDT FROM CHELSEA PARKERSON TO TENISHA MEADOWS * * *
The following information was provided by the Georgia Radioactive Materials Program (RMP) via email:
"The licensee submitted the dosimetry report for the manufacturing engineer involved in the incident. The individual received a deep dose equivalent of 36 mrem for the monitoring period of April 1, 2025 - June 30, 2025. RMP considers the incident closed with no further follow up needed."
Notified R1DO (Dimitriadis) and NMSS Events Notification (email).
Georgia incident number: 101