ENS 56313

v t e 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.

ENS 56313 +/-
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
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v • d • e

v t e Emergency Notification System
University of New Mexico with Non
WEEKMONTHYEAR2024-01-17T23:16:00 [Table view]
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