ENS 56313
ENS Event | |
|---|---|
20:20 Nov 23, 2022 | |
| Title | Unintentional HIGH-LEVEL Scram |
| Event Description | 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. |
| Where | |
|---|---|
| University of New Mexico Albuquerque, New Mexico (NRC Region 0) | |
| License number: | R-102 |
| Reporting | |
| Non | |
| Time - Person (Reporting Time:+1339.07 h55.795 days <br />7.971 weeks <br />1.834 months <br />) | |
| Opened: | Carl Willis 15:24 Jan 18, 2023 |
| NRC Officer: | Lloyd Desotell |
| Last Updated: | Jan 18, 2023 |
| 56313 - NRC Website
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University of New Mexico with Non | |
WEEKMONTHYEARENS 569272024-01-17T23:16:00017 January 2024 23:16:00
[Table view]Non NON-POWER Reactor - Administrative Tech Spec Violation ENS 566022023-06-20T05:59:00020 June 2023 05:59:00 Non Technical Specification Violation ENS 563132022-11-23T20:20:00023 November 2022 20:20:00 Non Unintentional HIGH-LEVEL Scram 2024-01-17T23:16:00 | |