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| Discovered date | Reporting criterion | Title | Description | LER | |
|---|---|---|---|---|---|
| ENS 56927 | 17 January 2024 23:16:00 | Non | NON-POWER Reactor - Administrative Tech Spec Violation | The following is a synopsis of information provided by the licensee via email and phone call: On January 17th, at 1616 MST, the Reactor Supervisor violated Technical Specification (TS) 6.1.12.a. During an NRC exam, a trainee was operating the reactor under the supervision of the reactor supervisor. The doorbell rang, and the supervisor requested that the reactor be scrammed and the console power be turned off, which was accomplished. The supervisor then stepped out of the reactor room, but the key remained in the console, thus the reactor was unsecured. TS 6.1.12.a requires one reactor operator or reactor supervisor to be in the room when the reactor is not secured. | |
| ENS 56602 | 20 June 2023 05:59:00 | Non | Technical Specification Violation | The following information is a summary provided by the licensee via phone and email: The University of New Mexico reported a violation of its non-power reactor technical specification (TS) 1.1.36(c) required alarm testing frequency. The alarm testing requirement requires that the site alarms be tested on a semi-annual basis, not to exceed 7.5 months. According to the licensee, the last successful test of the New Mexico non-power reactor alarm system occurred on October 27, 2022, which is in excess of the 7.5 month requirement. The reactor was at zero percent power when the TS violation was discovered and continues to be at zero percent power. Reactor operations are suspended until the issue is resolved. | |
| ENS 56313 | 23 November 2022 20:20:00 | Non | Unintentional HIGH-LEVEL Scram | The following information was provided by the licensee via email: (An) iodized table salt (sample) was inserted to centerline at 1222 (MST) to be irradiated at 4.0 watts. At 1227 the reactor was established as critical at 4.0 watts. The iodized table salt was irradiated until 1320. At 1320 the senior reactor operator communicated to a licensed operator that the salt would be removed. The senior reactor operator pulled the salt out with the power level at 4 watts. The reactor then entered a positive period and jumped to 6.0 watts, resulting in an unintentional high-level scram. The senior reactor operator called the chief supervisor and alerted him immediately of the event who then advised to create a report of the event. The chief supervisor then advised that in the future, better communication is necessary to account for the reactivity differences between an inserted sample and the inserted fuel rods. This event will be added to 'Lessons Learned' for future trainees. The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: The licensee notified the NRR Project Manager (Helvenston). All reactor systems responded as designed. |