ENS Event | |
|---|---|
19:00 Oct 14, 2024 | |
| Title | Noncompliance with Technical Specification |
| Event Description | The following information was provided by the licensee via phone and email:
University of Missouri Research Reactor (MURR), a 10 MW reactor, is reporting an abnormal occurrence as required per Technical Specification (TS) 1.1 b and c. One of two redundant switches on the Fluxtrap irradiations reactivity safety trip device failed reactor pre-startup checks on October 14, 2024. This failure would have prevented the switch from sending a scram input to the reactor protection system. MURR TS 3.2.g.21 requires a 1/N logic of 2, meaning both switches must be operational during operation of the reactor. The faulty switch was last confirmed operating properly prior to reactor startup on October 7, 2024. MURR cannot positively state when the switch failed. This condition could have existed during operations at some point between October 7 and October 13, 2024. The second switch was verified to be operable. The faulty switch and its associated wiring were replaced, retested satisfactorily, and the reactor was returned to operation the evening of Monday, October 14, 2024 with authorization from the Facility Director. MURR will follow up with a written report to the NRC within 14 days as required by TS 6.6.c. NRC Project Manager has been notified. The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: A causal investigation is in progress. Equipment age is the potential cause of the failure. |
| Where | |
|---|---|
| University of Missouri-Columbia Columbia, Missouri (NRC Region 3) | |
| License number: | R-103 |
| Reporting | |
| Non | |
| Time - Person (Reporting Time:+20.65 h0.86 days <br />0.123 weeks <br />0.0283 months <br />) | |
| Opened: | Deborah Farnsworth 15:39 Oct 15, 2024 |
| NRC Officer: | Natalie Starfish |
| Last Updated: | Oct 15, 2024 |
| 57382 - NRC Website
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University of Missouri-Columbia with Non | |
WEEKMONTHYEARENS 573822024-10-14T19:00:00014 October 2024 19:00:00
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