ENS 53433

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v t e ENS Event
12:10 May 30, 2018
Title	Technical Specification Deviation
Event Description	On May 30, 2018, at 07:10 CST, with the reactor operating at 10 MW in the automatic control mode, MURR [University of Missouri Research Reactor] was shut down due to a failure of the Control Rod Operate Switch 1S4 to move the shim control blades in the inward direction. The Reactor Safety (Scram) and Rod-Run-In Systems were unaffected by this failure and remained operational and would automatically and manually initiate, if required. This email is a required notification per MURR TS [Technical Specification] 6.6.c(1) to report to the NRC Operations Center that an Abnormal Occurrence, as defined by MURR TS 1.1.b, has occurred. MURR was not in compliance with all of the Limiting Conditions for Operations (LCOs) as established in Section 3.0. Specifically, MURR was not in compliance with TS 3.2.a, which states, All control blades, including the regulating blade, shall be operable during reactor operation. Control Rod Operate Switch 1S4 was replaced and retest was conducted satisfactorily, which included verifying inward and outward movement of all 4 shim control blades. Authorization was received from the Reactor Facility Director, as required by TS 6.6.c(4), to restart the reactor and resume 10 MW operation. A detailed event report will follow within 14 days as required by MURR TS 6.6.c(3). The failure was identified during scheduled testing and the reactor was shutdown by manual Scram in accordance with procedures. The licensee notified the NRC Research and Test Reactor Project Manager (Wertz).

ENS 53433 +/-
Where
Univ Of Missouri-Columbia Columbia, Missouri (NRC Region 0)
License number:	R-103
Reporting

Non
Time - Person (Reporting Time:+20.73 h0.864 days <br />0.123 weeks <br />0.0284 months <br />)
Opened:	Sean Schaefer 08:54 May 31, 2018
NRC Officer:	Thomas Kendzia Property "NRC officer" (as page type) with input value "Thomas Kendzia " contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
Last Updated:	May 31, 2018
53433 - NRC Website
v • d • e

v t e Emergency Notification System
Univ Of Missouri-Columbia with Non
WEEKMONTHYEAR2021-07-26T22:31:00 [Table view]
[ENS list for Univ Of Missouri-Columbia]

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