Event Notification Report for July 27, 2023
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/26/2023 - 07/27/2023
Agreement State
Event Number: 56629
Rep Org: Colorado Dept of Health
Licensee: Karcher North America Inc
Region: 4
City: Englewood State: CO
County:
License #: GL001195
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Lawrence Criscione
Notification Date: 07/19/2023
Notification Time: 18:05 [ET]
Event Date: 06/01/2022
Event Time: 00:00 [MDT]
Last Update Date: 07/20/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
Roldan-Otero, Lizette (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Event Text
AGREEMENT STATE REPORT - LOST STATIC ELIMINATOR
The following is a synopsis of information provided by the Colorado Department of Public Health and Environment via email:
The licensee reported the loss of one static eliminator (NRD model P-2021) containing 10 mCi of Po-210. This is being reported in accordance with Colorado Regulations Section 4.51.1.1 (10 CFR 20.2202(a)(1)).
Colorado Event Number: CO230020
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: 56630
Rep Org: Colorado Dept of Health
Licensee: Sargent Schools
Region: 4
City: Monte Vista State: CO
County:
License #: GL000885
Agreement: Y
Docket:
NRC Notified By: Kathryn Kirk
HQ OPS Officer: Lawrence Criscione
Notification Date: 07/20/2023
Notification Time: 15:48 [ET]
Event Date: 11/01/2022
Event Time: 00:00 [MDT]
Last Update Date: 07/20/2023
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
Person (Organization):
Roldan-Otero, Lizette (R4DO)
NMSS_EVENTS_NOTIFICATION (EMAIL)
ILTAB, (EMAIL) (EMAIL)
Event Text
AGREEMENT STATE REPORT - LOST EXIT SIGNS
The following is a summary of information received from the Colorado Department of Public Health and Environment via email:
The licensee reported four lost exit signs each containing 11.5 Ci of tritium.
Colorado Event Report ID Number: CO230021
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: 56637
Facility: Millstone
Region: 1 State: CT
Unit: [2] [] []
RX Type: [1] GE-3,[2] CE,[3] W-4-LP
NRC Notified By: Jason Parr
HQ OPS Officer: Thomas Herrity
Notification Date: 07/25/2023
Notification Time: 16:06 [ET]
Event Date: 07/25/2023
Event Time: 09:24 [EDT]
Last Update Date: 07/25/2023
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
Bickett, Carey (R1DO)
Power Reactor Unit Info
| Unit |
SCRAM Code |
RX Crit |
Initial PWR |
Initial RX Mode |
Current PWR |
Current RX Mode |
| 2 |
N |
Y |
86 |
Power Operation |
86 |
Power Operation |
Event Text
CONTROL ROOM ENVELOPE INOPERABLE
The following information was provided by the licensee via email:
"At 0924 [EDT] on July 25, 2023, it was discovered that both trains of control room air conditioning system were simultaneously inoperable due to an inoperable control room envelope boundary. The boundary was restored at 0925 [EDT] on July 25, 2023. This condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(D).
"There was no impact on the health and safety of the public or plant personnel.
"The NRC Resident Inspector has been notified.
"There has been no impact to Unit 3 which remains at 100% power."
Power Reactor
Event Number: 56641
Facility: River Bend
Region: 4 State: LA
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: Adam Willson
HQ OPS Officer: Brian P. Smith
Notification Date: 07/26/2023
Notification Time: 09:10 [ET]
Event Date: 07/18/2023
Event Time: 15:14 [CDT]
Last Update Date: 07/26/2023
Emergency Class: Non Emergency
10 CFR Section:
21.21(d)(3)(i) - Defects And Noncompliance
Person (Organization):
Young, Cale (R4DO)
Part 21/50.55 Reactors, - (EMAIL)
Power Reactor Unit Info
| Unit |
SCRAM Code |
RX Crit |
Initial PWR |
Initial RX Mode |
Current PWR |
Current RX Mode |
| 1 |
N |
Y |
100 |
Power Operation |
100 |
Power Operation |
Event Text
PART 21 REPORT - MOTOR DRIVEN RELAY FAILED TESTING
The following information is a synopsis provided by the licensee via email:
River Bend Station completed an internal Part 21 evaluation concerning a motor driven relay that failed pre-installation testing due to a buildup of corrosion between the rotor and relay core. The relay was planned for use in the Remote Shutdown System. The NRC Resident has been notified. A written notification will be provided within 30 days.
Affected known plants include only River Bend at the time of the notification.