Event Notification Report for September 09, 2025
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
09/08/2025 - 09/09/2025
Agreement State
Event Number: 57913
Rep Org: Colorado Dept of Health
Licensee: LDS Church - Woodland Park
Region: 4
City: Woodland Park State: CO
County:
License #: GL000265
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Eric Simpson
Licensee: LDS Church - Woodland Park
Region: 4
City: Woodland Park State: CO
County:
License #: GL000265
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Eric Simpson
Notification Date: 09/10/2025
Notification Time: 10:42 [ET]
Event Date: 09/09/2025
Event Time: 00:00 [MDT]
Last Update Date: 09/10/2025
Notification Time: 10:42 [ET]
Event Date: 09/09/2025
Event Time: 00:00 [MDT]
Last Update Date: 09/10/2025
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
Deese, Rick (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Deese, Rick (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 Environmental (the Department) via email.
The Department received a notification from LDS Church that seventeen (17) exit signs, each with 14.5 Ci of tritium were lost in Woodland Park, Colorado.
Manufacturer: SRB Technologies
Model Number: BXU20BS
Colorado Event Report ID Number: CO250025
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 Environmental (the Department) via email.
The Department received a notification from LDS Church that seventeen (17) exit signs, each with 14.5 Ci of tritium were lost in Woodland Park, Colorado.
Manufacturer: SRB Technologies
Model Number: BXU20BS
Colorado Event Report ID Number: CO250025
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
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 57912
Facility: Millstone
Region: 1 State: CT
Unit: [2] [] []
RX Type: [1] GE-3,[2] CE,[3] W-4-LP
NRC Notified By: Josh Lindsey
HQ OPS Officer: Eric Simpson
Region: 1 State: CT
Unit: [2] [] []
RX Type: [1] GE-3,[2] CE,[3] W-4-LP
NRC Notified By: Josh Lindsey
HQ OPS Officer: Eric Simpson
Notification Date: 09/10/2025
Notification Time: 05:23 [ET]
Event Date: 09/09/2025
Event Time: 22:50 [EDT]
Last Update Date: 09/12/2025
Notification Time: 05:23 [ET]
Event Date: 09/09/2025
Event Time: 22:50 [EDT]
Last Update Date: 09/12/2025
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(C) - Pot Uncntrl Rad Rel
10 CFR Section:
50.72(b)(3)(v)(C) - Pot Uncntrl Rad Rel
Person (Organization):
Ford, Monica (R1DO)
Ford, Monica (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
EN Revision Imported Date: 9/15/2025
EN Revision Text: ENCLOSURE BUILDING BOUNDARY INOPERABLE
The following information was provided by the licensee via phone and fax:
"Entry into shutdown technical specification action statement due to an identified breach in ventilation ductwork.
"At 2250 EDT on September 9, 2025, it was discovered that there was degraded manway sealant on the manway to fire damper HV-298A. This degraded sealant results in a direct path from the enclosure building to the atmosphere, challenging the enclosure building boundary. This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C).
"There is no impact on the health and safety of the public or plant personnel.
"The plant is currently in a 24-hour technical specification action statement (3.6.5.2) for Unit 2. Unit 3 is not impacted and continues to operate at 100 percent power."
The Resident Inspector has been notified.
* * * RETRACTION ON SEPTEMBER 12, 2025, AT 0908 EDT FROM JARED FARLEY TO ERIC SIMPSON * * *
The following information was provided by the licensee via phone and fax:
"Millstone Unit 2 is retracting NRC Event Notification (EN) 57912, made on September 10, 2025, at 0523 EDT, regarding a condition identified at Millstone Power Station Unit 2. The condition involved degraded sealant on manways to fire dampers HV-298A/B/G, which resulted in a direct path from the enclosure building to the atmosphere, challenging the integrity of the enclosure building boundary. This condition was initially reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C) for an event or condition that could have prevented the fulfillment of a safety function (control of release of radioactive material).
"A subsequent review using additional information on hatch design and actual seating surface determined that there is reasonable assurance the enclosure building boundary remained operable and retained its safety function to control the release of radioactive material and mitigate the consequences of an accident. Based on this assessment, Unit 2 exited Technical Specification action statement 3.6.5.2, and the condition is not reportable under 10 CFR 50.72(b)(3)(v)(C). Therefore, NRC EN 57912 is being retracted."
The Resident Inspector has been notified.
Notified R1DO (Ford).
EN Revision Text: ENCLOSURE BUILDING BOUNDARY INOPERABLE
The following information was provided by the licensee via phone and fax:
"Entry into shutdown technical specification action statement due to an identified breach in ventilation ductwork.
"At 2250 EDT on September 9, 2025, it was discovered that there was degraded manway sealant on the manway to fire damper HV-298A. This degraded sealant results in a direct path from the enclosure building to the atmosphere, challenging the enclosure building boundary. This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C).
"There is no impact on the health and safety of the public or plant personnel.
"The plant is currently in a 24-hour technical specification action statement (3.6.5.2) for Unit 2. Unit 3 is not impacted and continues to operate at 100 percent power."
The Resident Inspector has been notified.
* * * RETRACTION ON SEPTEMBER 12, 2025, AT 0908 EDT FROM JARED FARLEY TO ERIC SIMPSON * * *
The following information was provided by the licensee via phone and fax:
"Millstone Unit 2 is retracting NRC Event Notification (EN) 57912, made on September 10, 2025, at 0523 EDT, regarding a condition identified at Millstone Power Station Unit 2. The condition involved degraded sealant on manways to fire dampers HV-298A/B/G, which resulted in a direct path from the enclosure building to the atmosphere, challenging the integrity of the enclosure building boundary. This condition was initially reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C) for an event or condition that could have prevented the fulfillment of a safety function (control of release of radioactive material).
"A subsequent review using additional information on hatch design and actual seating surface determined that there is reasonable assurance the enclosure building boundary remained operable and retained its safety function to control the release of radioactive material and mitigate the consequences of an accident. Based on this assessment, Unit 2 exited Technical Specification action statement 3.6.5.2, and the condition is not reportable under 10 CFR 50.72(b)(3)(v)(C). Therefore, NRC EN 57912 is being retracted."
The Resident Inspector has been notified.
Notified R1DO (Ford).