ENS 54149

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v t e ENS Event
16:00 Jul 1, 2019
Title	Non-Power Reactor Report - Technical Specification Deviation
Event Description	The following was received via e-mail: On July 1, 2019, sometime between 1100 and 1200 CDT with the reactor shut down and during performance of electrical preventative maintenance, the University of Missouri-Columbia Research Reactor (MURR) deviated from Technical Specification (TS) 3.4 because reactor containment integrity did not exist for approximately ten (10) minutes while the reactor was not secured, as defined by TS 1.26. During this event time, two (2) shim control rod drive mechanisms were not installed because scheduled work was in progress on these drive mechanisms. Therefore, the reactor was not secured per TS definition 1.26, but the reactor was shut down per TS definition 1.27. Also during this time, and unknown to the Control Room operators, an Electronics Technician opened the two (2) electrical motor breakers to the reactor containment system's two (2) automatically-closing doors one at a time for approximately 5 minutes each. Though this event happened on July 1, no NRC-licensed operator knew that the automatically-closing door motor breakers had been opened on July 1 until mid-day on July 3. Once the abnormal occurrence was realized, the Reactor Facility Director was briefed on the situation on the afternoon of July 3, and he gave permission to continue reactor operation in accordance with TS 6.6.c.(4). This email is a required notification per TS 6.6.c.(1) to report to the NRC Operations Center that an Abnormal Occurrence, as defined by TS 1.1.b, has occurred. MURR was not in compliance with all of the Limiting Conditions for Operations as established in TS Section 3.0. A detailed event report will follow within 14 days as required by TS 6.6.c.(3).

ENS 54149 +/-
Where
Univ Of Missouri-Columbia Columbia, Missouri (NRC Region 0)
License number:	R-103
Reporting

10 CFR 50.72(b)(1), 50.54(x) TS Deviation
Time - Person (Reporting Time:+89.3 h3.721 days <br />0.532 weeks <br />0.122 months <br />)
Opened:	Bruce Meffert 09:18 Jul 5, 2019
NRC Officer:	Jeffrey Whited Property "NRC officer" (as page type) with input value "Jeffrey Whited " contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
Last Updated:	Jul 5, 2019
54149 - NRC Website
v • d • e

v t e Emergency Notification System
Univ Of Missouri-Columbia with 10 CFR 50.72(b)(1), 50.54(x) TS Deviation
WEEKMONTHYEAR2019-07-01T16:00:00 [Table view]
[ENS list for Univ Of Missouri-Columbia]

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