ENS 57180
ENS Event | |
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05:00 Jun 17, 2024 | |
Title | Noncompliance with Technical Specification |
Event Description | The following information was provided by the licensee via email and phone:
During investigation related to licensee event report (LER) number 24-001, a noncompliance with technical specification 3.10.d was discovered. During the period from July 2022 to April 2024, three filters operating at greater than 99 percent efficiency were not in service. The limiting condition of this technical specification is associated with operation of an I-131 processing suite, rather than with operation of the reactor. The University of Missouri Research Reactor's iodine suite ventilation includes a series of seven filter trains, each of which were in service during this period at an efficiency greater than 98 percent. Filter banks '2' and '3' were operating at greater than 99 percent efficiency. Filter '3-3' was also credited as greater than 99 percent efficiency, however, the bypass between the two banks of filter '3-3' consisted of dampers rather than valves. Therefore the total efficiency, when bypass was taken into account, was less than 99 percent. Processing of iodine was generally performed weekly during the referenced period. Processing of iodine was suspended in May 2024 in association with LER 24-001, and remains suspended until compliance is achieved. Several detectors were monitoring the suite and downstream effluent from the suite during the referenced period, including the off-gas (stack) radiation monitor per technical specification 3.10.c. Additional monitors were in service, including a duct monitor, in-room [derived air concentration] monitors, and the remaining three I-131 processing hot cells radiation monitors. No in-service monitors indicated abnormal rises in iodine levels during the period in question. |
Where | |
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Univ Of Missouri-Columbia (Misc) Columbia, Missouri (NRC Region 0) | |
License number: | R-103 |
Reporting | |
Non | |
Time - Person (Reporting Time:+35.32 h1.472 days <br />0.21 weeks <br />0.0484 months <br />) | |
Opened: | Deborah Farnsworth 16:19 Jun 18, 2024 |
NRC Officer: | Tenisha Meadows |
Last Updated: | Jun 18, 2024 |
57180 - NRC Website
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University of Missouri-Columbia with Non | |
WEEKMONTHYEARENS 571802024-06-17T05:00:00017 June 2024 05:00:00
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