Event Notification Report for May 10, 2024
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
05/09/2024 - 05/10/2024
EVENT NUMBERS
57125
57125
Non-Power Reactor
Event Number: 57125
Rep Org: Univ Of Missouri-Columbia (MISC)
Licensee: University Of Missouri
Region: 0
City: Columbia State: MO
County: Boone
License #: R-103
Agreement: N
Docket: 05000186
NRC Notified By: Daniel Doenges
HQ OPS Officer: Tenisha Meadows
Licensee: University Of Missouri
Region: 0
City: Columbia State: MO
County: Boone
License #: R-103
Agreement: N
Docket: 05000186
NRC Notified By: Daniel Doenges
HQ OPS Officer: Tenisha Meadows
Notification Date: 05/13/2024
Notification Time: 14:21 [ET]
Event Date: 05/10/2024
Event Time: 00:00 [CDT]
Last Update Date: 05/13/2024
Notification Time: 14:21 [ET]
Event Date: 05/10/2024
Event Time: 00:00 [CDT]
Last Update Date: 05/13/2024
Emergency Class: Non Emergency
10 CFR Section:
10 CFR Section:
Person (Organization):
Jessica Lovett (NRR)
Andrew Waugh (NRR)
Jessica Lovett (NRR)
Andrew Waugh (NRR)
TECHNICAL SPECIFICATION VIOLATION
The following information was provided by the licensee via phone and email:
"During a routine source check on 5/10/2024, it was noted that three of the six iodine-131 processing hot cell radiation monitors were located incorrectly. Upon investigation, it was discovered that on 4/19/2024 the filter banks were switched between bank 'A' and bank 'B'. During this filter bank switch, the detectors monitoring the filter banks were also not changed. This led to processing iodine three times between 4/19/2024 and 5/10/2024 without meeting the conditions of Technical Specification 3.10.c regarding monitoring requirements. The event was corrected on 5/10/2024.
"Several detectors were monitoring the suite during the period from 4/19/2024 and 5/10/2024, including the off-gas (stack) radiation monitor per Technical Specification 3.10.c. Additional monitors were in service, including a duct monitor, in-room DAC monitors, and the remaining three iodine-131 processing hot cell radiation monitors. No in-service monitors indicated abnormal rises in iodine levels.
"After the detectors were returned to service in the correct location, it was noted that the readings on the filter banks were very low. These readings provide supporting evidence that they were not being loaded while the detectors were incorrectly located."
The following information was provided by the licensee via phone and email:
"During a routine source check on 5/10/2024, it was noted that three of the six iodine-131 processing hot cell radiation monitors were located incorrectly. Upon investigation, it was discovered that on 4/19/2024 the filter banks were switched between bank 'A' and bank 'B'. During this filter bank switch, the detectors monitoring the filter banks were also not changed. This led to processing iodine three times between 4/19/2024 and 5/10/2024 without meeting the conditions of Technical Specification 3.10.c regarding monitoring requirements. The event was corrected on 5/10/2024.
"Several detectors were monitoring the suite during the period from 4/19/2024 and 5/10/2024, including the off-gas (stack) radiation monitor per Technical Specification 3.10.c. Additional monitors were in service, including a duct monitor, in-room DAC monitors, and the remaining three iodine-131 processing hot cell radiation monitors. No in-service monitors indicated abnormal rises in iodine levels.
"After the detectors were returned to service in the correct location, it was noted that the readings on the filter banks were very low. These readings provide supporting evidence that they were not being loaded while the detectors were incorrectly located."