ENS 53433
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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). |
| 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 |
| Last Updated: | May 31, 2018 |
| 53433 - NRC Website | |
Univ Of Missouri-Columbia with Non | |
WEEKMONTHYEARENS 553802021-07-26T22:31:00026 July 2021 22:31:00
[Table view]Non Reactor Shutdown Due to Control Rod Drive Failure ENS 546602020-04-09T19:32:0009 April 2020 19:32:00 Non Abnormal Occurrence ENS 546532020-04-08T06:00:0008 April 2020 06:00:00 Non Research and Test Reactor Forced Shutdown Due to Failure of Regulating Blade Drive Mechanism ENS 544532019-12-20T03:21:00020 December 2019 03:21:00 Non Technical Specification Deviation ENS 544362019-12-10T06:12:00010 December 2019 06:12:00 Non Technical Specification Violation Requiring Shutdown ENS 541872019-07-30T00:03:00030 July 2019 00:03:00 Non Technical Specification Deviation ENS 540342019-04-28T11:33:00028 April 2019 11:33:00 Non Control Blade Inoperable ENS 538492019-01-28T01:13:00028 January 2019 01:13:00 Non Control Blade Inoperable ENS 538412019-01-21T18:35:00021 January 2019 18:35:00 Non Deviation of Ts 3.3.A(1) for Anti-Siphon Device Found Inoperable ENS 534332018-05-30T12:10:00030 May 2018 12:10:00 Non Technical Specification Deviation ENS 532442018-03-04T09:08:0004 March 2018 09:08:00 Non Technical Specification Deviation ENS 531422017-12-30T13:17:00030 December 2017 13:17:00 Non Technical Specification Required Report for an Abnormal Occurrence ENS 528412017-07-05T05:00:0005 July 2017 05:00:00 Non Abnormal Occurrence Due to Source Range Inoperability During Reactor Start-Up ENS 527022017-04-20T19:49:00020 April 2017 19:49:00 Non Technical Specification Required Report for an Abnormal Occurrence 2021-07-26T22:31:00 | |
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