Event Notification Report for October 06, 2025
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U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/05/2025 - 10/06/2025
Agreement State
Event Number: 57954
Rep Org: Colorado Dept of Health
Licensee: Century 16 Theaters Boulder #492
Region: 4
City: Boulder State: CO
County:
License #: GL001605
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Josue Ramirez
Licensee: Century 16 Theaters Boulder #492
Region: 4
City: Boulder State: CO
County:
License #: GL001605
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Josue Ramirez
Notification Date: 09/26/2025
Notification Time: 13:03 [ET]
Event Date: 09/25/2025
Event Time: 00:00 [MDT]
Last Update Date: 09/26/2025
Notification Time: 13:03 [ET]
Event Date: 09/25/2025
Event Time: 00:00 [MDT]
Last Update Date: 09/26/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
AGREEMENT STATE REPORT - LOST EXIT SIGNS
The following is a summary of information provided by the Colorado Department of Public Health and Environment (the Department) via email:
The Department received notification from the licensee that 10 exit signs containing 9.5 Ci of tritium each were lost in Boulder, Colorado.
Manufacturer: Isolite Corporation
Model number: 880-12-6
Isotope: H-3
Activity: 95 Ci
Colorado event report ID number: CO250030
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
The following is a summary of information provided by the Colorado Department of Public Health and Environment (the Department) via email:
The Department received notification from the licensee that 10 exit signs containing 9.5 Ci of tritium each were lost in Boulder, Colorado.
Manufacturer: Isolite Corporation
Model number: 880-12-6
Isotope: H-3
Activity: 95 Ci
Colorado event report ID number: CO250030
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
Agreement State
Event Number: 57955
Rep Org: Virginia Rad Materials Program
Licensee: Hillis-Carnes Engineering Associates Inc.
Region: 1
City: Chesterfield State: VA
County: Chesterfield
License #: 107-453-1
Agreement: Y
Docket:
NRC Notified By: Sheila Nelson
HQ OPS Officer: Josue Ramirez
Licensee: Hillis-Carnes Engineering Associates Inc.
Region: 1
City: Chesterfield State: VA
County: Chesterfield
License #: 107-453-1
Agreement: Y
Docket:
NRC Notified By: Sheila Nelson
HQ OPS Officer: Josue Ramirez
Notification Date: 09/26/2025
Notification Time: 14:05 [ET]
Event Date: 09/26/2025
Event Time: 08:20 [EDT]
Last Update Date: 09/26/2025
Notification Time: 14:05 [ET]
Event Date: 09/26/2025
Event Time: 08:20 [EDT]
Last Update Date: 09/26/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Lilliendahl, Jon (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
Lilliendahl, Jon (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
AGREEMENT STATE REPORT - VEHICLE CARRYING NUCLEAR GAUGE INVOLVED IN AN ACCIDENT
The following information was received via email from the Virginia Radiation Materials Program (VRMP):
"At approximately 1020 EDT on September 26, 2025, VRMP was notified of an automobile accident involving a vehicle carrying a portable nuclear gauge. At approximately 0820 EDT on September 26, 2025, a Troxler model 3430 portable nuclear density/moisture gauge (S/N 36802), containing 9 mCi of Cs-137 and 44 mCi of Am-241, was in a vehicle that was struck from behind in Chesterfield, VA. While a relatively minor accident, once it was noted that the radioactive material was present, the Chesterfield Hazardous Material team responded.
"The vehicle was isolated (300-meter perimeter), and the highway was shut down for approximately 2 hours. The authorized user notified his supervisor (assistant radiation safety officer (RSO), who then notified the RSO. The [assistant RSO] went to the site to evaluate the gauge. She notified VRMP. Per the assistant RSO, the gauge was appropriately blocked, braced, and secured in the trunk of the car when it was rear-ended. The car sustained damage but there was no apparent damage to the case or gauge.
"The licensee and the hazmat team surveyed the case/gauge and readings were within acceptable ranges indicating no source exposure. The case/gauge was moved to another of the licensee's vehicles and returned to the licensee's storage facility for further evaluation. There were no injuries as a result of the accident and no radiation exposures.
"VRMP will follow up with an investigation."
Virginia event report number: VA250004
The following information was received via email from the Virginia Radiation Materials Program (VRMP):
"At approximately 1020 EDT on September 26, 2025, VRMP was notified of an automobile accident involving a vehicle carrying a portable nuclear gauge. At approximately 0820 EDT on September 26, 2025, a Troxler model 3430 portable nuclear density/moisture gauge (S/N 36802), containing 9 mCi of Cs-137 and 44 mCi of Am-241, was in a vehicle that was struck from behind in Chesterfield, VA. While a relatively minor accident, once it was noted that the radioactive material was present, the Chesterfield Hazardous Material team responded.
"The vehicle was isolated (300-meter perimeter), and the highway was shut down for approximately 2 hours. The authorized user notified his supervisor (assistant radiation safety officer (RSO), who then notified the RSO. The [assistant RSO] went to the site to evaluate the gauge. She notified VRMP. Per the assistant RSO, the gauge was appropriately blocked, braced, and secured in the trunk of the car when it was rear-ended. The car sustained damage but there was no apparent damage to the case or gauge.
"The licensee and the hazmat team surveyed the case/gauge and readings were within acceptable ranges indicating no source exposure. The case/gauge was moved to another of the licensee's vehicles and returned to the licensee's storage facility for further evaluation. There were no injuries as a result of the accident and no radiation exposures.
"VRMP will follow up with an investigation."
Virginia event report number: VA250004
Agreement State
Event Number: 57956
Rep Org: Florida Bureau of Radiation Control
Licensee: Citrus Cardiology Consultants
Region: 1
City: Crystal River State: FL
County:
License #: 4829-5
Agreement: Y
Docket:
NRC Notified By: Mark Seidensticker
HQ OPS Officer: Josue Ramirez
Licensee: Citrus Cardiology Consultants
Region: 1
City: Crystal River State: FL
County:
License #: 4829-5
Agreement: Y
Docket:
NRC Notified By: Mark Seidensticker
HQ OPS Officer: Josue Ramirez
Notification Date: 09/26/2025
Notification Time: 16:34 [ET]
Event Date: 09/26/2025
Event Time: 16:34 [EDT]
Last Update Date: 09/26/2025
Notification Time: 16:34 [ET]
Event Date: 09/26/2025
Event Time: 16:34 [EDT]
Last Update Date: 09/26/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Lilliendahl, Jon (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Lilliendahl, Jon (R1DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
AGREEMENT STATE REPORT - LOST SOURCE
The following information was provided by the Florida Bureau of Radiation Control (BRC) via email:
"The radiation safety officer (RSO) with Citrus Cardiology Consultants in Crystal River, Florida, called the BRC this afternoon regarding a lost 94.6 microcurie Ge-68 source, S/N 2509-89. The RSO said the source is used in a BQC Styrofoam pillow for tuning a positron emission tomography (PET) camera. The RSO said an installer for their new PET camera, out of Houston, Texas, used the Ge-68 source with a Styrofoam pillow to tune the new PET and left the source and pillow in their hot lab. The pillow is approximately two feet long and crescent shaped.
"The RSO said nobody associated with the hot lab saw the BQC pillow, the source, or the box it supposedly came in. The installer has reciprocity with Florida. The company is Catalyst MedTech in Houston, Texas."
FL incident number: FL25-095
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
The following information was provided by the Florida Bureau of Radiation Control (BRC) via email:
"The radiation safety officer (RSO) with Citrus Cardiology Consultants in Crystal River, Florida, called the BRC this afternoon regarding a lost 94.6 microcurie Ge-68 source, S/N 2509-89. The RSO said the source is used in a BQC Styrofoam pillow for tuning a positron emission tomography (PET) camera. The RSO said an installer for their new PET camera, out of Houston, Texas, used the Ge-68 source with a Styrofoam pillow to tune the new PET and left the source and pillow in their hot lab. The pillow is approximately two feet long and crescent shaped.
"The RSO said nobody associated with the hot lab saw the BQC pillow, the source, or the box it supposedly came in. The installer has reciprocity with Florida. The company is Catalyst MedTech in Houston, Texas."
FL incident number: FL25-095
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
Agreement State
Event Number: 57957
Rep Org: Colorado Dept of Health
Licensee: LDS Church - Pueblo-Fortino
Region: 4
City: Pueblo State: CO
County:
License #: GL002433
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Josue Ramirez
Licensee: LDS Church - Pueblo-Fortino
Region: 4
City: Pueblo State: CO
County:
License #: GL002433
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Josue Ramirez
Notification Date: 09/26/2025
Notification Time: 18:10 [ET]
Event Date: 02/04/2025
Event Time: 00:00 [MDT]
Last Update Date: 09/26/2025
Notification Time: 18:10 [ET]
Event Date: 02/04/2025
Event Time: 00:00 [MDT]
Last Update Date: 09/26/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Drake, James (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
AGREEMENT STATE REPORT - LOST EXIT SIGNS
The following is a summary of information provided by the Colorado Department of Public Health and Environment (the Department) via email:
The Department received a notification from the licensee that three exit signs containing 17.5 Ci of tritium each were lost in Pueblo, Colorado.
Manufacturer: SRB Technologies
Model number: BR-20-BK
Isotope: H-3
Activity: 52.5 Ci
Event report ID number: CO250031
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
The following is a summary of information provided by the Colorado Department of Public Health and Environment (the Department) via email:
The Department received a notification from the licensee that three exit signs containing 17.5 Ci of tritium each were lost in Pueblo, Colorado.
Manufacturer: SRB Technologies
Model number: BR-20-BK
Isotope: H-3
Activity: 52.5 Ci
Event report ID number: CO250031
THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
Power Reactor
Event Number: 57963
Facility: South Texas
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Long Han
HQ OPS Officer: Jordan Wingate
Region: 4 State: TX
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Long Han
HQ OPS Officer: Jordan Wingate
Notification Date: 10/02/2025
Notification Time: 20:55 [ET]
Event Date: 10/02/2025
Event Time: 16:52 [CDT]
Last Update Date: 10/02/2025
Notification Time: 20:55 [ET]
Event Date: 10/02/2025
Event Time: 16:52 [CDT]
Last Update Date: 10/02/2025
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Vossmar, Patricia (R4DO)
Vossmar, Patricia (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | 100 |
EN Revision Imported Date: 10/6/2025
EN Revision Text: TWO TRAINS OF ECCS INOPERABLE
The following information was provided by the licensee via phone and email:
"On October 2, 2025, at 1651 CDT, essential cooling water pump '1C' tripped. Essential chiller '1C' and cascading equipment, including emergency core cooling system (ECCS) train '1C,' was declared inoperable.
"Essential chiller '12A' and cascading equipment, including ECCS train '1A,' was concurrently inoperable for ongoing maintenance.
"This condition resulted in an inoperable condition on 2 out of 3 safety trains for the accident mitigating functions, including the train 'A' and train 'C' high head safety injection (SI), low head SI, containment spray, electrical auxiliary building heating ventilation and air conditioning (HVAC), and essential chilled water. All 'B' train safety related equipment remains operable. There was no impact on the health and safety of the public or plant personnel.
"The repair timeline is unknown. We have already entered the configuration risk management program to mitigate additional maintenance induced risk with a risk informed completion time of October 19, 2025, at 1140 CDT. We are limited by TS 3.7.7.C to restore 1 train of control room HVAC by October 5, 2025, at 1651 CDT.
"This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D).
"The NRC Resident Inspector has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The 'C' emergency diesel generator is unavailable due to the loss of cooling water. Maintenance on the ECCS train '1A' is partially complete and operators are working to restore the train to an operable status prior to the technical specification deadline. The essential cooling water pump trip was due to a hot spot causing the pump to overheat. The cause of the hot spot is still under investigation.
EN Revision Text: TWO TRAINS OF ECCS INOPERABLE
The following information was provided by the licensee via phone and email:
"On October 2, 2025, at 1651 CDT, essential cooling water pump '1C' tripped. Essential chiller '1C' and cascading equipment, including emergency core cooling system (ECCS) train '1C,' was declared inoperable.
"Essential chiller '12A' and cascading equipment, including ECCS train '1A,' was concurrently inoperable for ongoing maintenance.
"This condition resulted in an inoperable condition on 2 out of 3 safety trains for the accident mitigating functions, including the train 'A' and train 'C' high head safety injection (SI), low head SI, containment spray, electrical auxiliary building heating ventilation and air conditioning (HVAC), and essential chilled water. All 'B' train safety related equipment remains operable. There was no impact on the health and safety of the public or plant personnel.
"The repair timeline is unknown. We have already entered the configuration risk management program to mitigate additional maintenance induced risk with a risk informed completion time of October 19, 2025, at 1140 CDT. We are limited by TS 3.7.7.C to restore 1 train of control room HVAC by October 5, 2025, at 1651 CDT.
"This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D).
"The NRC Resident Inspector has been notified."
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The 'C' emergency diesel generator is unavailable due to the loss of cooling water. Maintenance on the ECCS train '1A' is partially complete and operators are working to restore the train to an operable status prior to the technical specification deadline. The essential cooling water pump trip was due to a hot spot causing the pump to overheat. The cause of the hot spot is still under investigation.
Page Last Reviewed/Updated October 06, 2025