ENS 54453

v t e ENS Event
03:21 Dec 20, 2019
Title	Technical Specification Deviation
Event Description	On December 19, 2019, at 2121 CST, the University of Missouri-Columbia Research Reactor (MURR) was shut down due to a seized servomotor on the regulating blade drive mechanism during reactor operation. This notification is required per MURR Technical Specification (TS) 6.6.c(1) to report to the NRC Operations Center that an Abnormal Occurrence, as defined by TS 1.1, had occurred. MURR was not in compliance with all Limiting Conditions for Operations (LCOs), specifically TS 3.2.a, which states, 'All control blades, including the regulating blade, shall be operable during reactor operation.' The regulating blade drive mechanism was removed, a new motor installed, and then the regulating blade drive mechanism was reinstalled and all its functions were tested satisfactorily. Permission from the Reactor Facility Director was obtained per TS 6.6.c(4) prior to starting up the reactor later on December 20. A detailed event report will follow within 14 days as required by TS 6.6.c(3).

ENS 54453 +/-
Where
Univ Of Missouri-Columbia Columbia, Missouri (NRC Region 0)
License number:	R-103
Reporting

Non
Time - Person (Reporting Time:+3.37 h0.14 days <br />0.0201 weeks <br />0.00462 months <br />)
Opened:	Jeremy Custer 06:43 Dec 20, 2019
NRC Officer:	Andrew Waugh
Last Updated:	Dec 20, 2019
54453 - NRC Website
v • d • e

v t e Emergency Notification System
Univ Of Missouri-Columbia with Non
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