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On 4/9/20, at 1432 CDT, the University of … On 4/9/20, at 1432 CDT, the University of Missouri-Columbia Research Reactor (MURR) was shut down due to the failure of the geared rotary limit switch assembly to move with corresponding regulating blade drive mechanism movement. This email is a required notification per MURR Technical Specification (TS) 6.6.c(1) to report to the NRC Operations Center that an Abnormal Occurrence, as defined by MURR TS 1.1, had occurred. MURR was not in compliance with one (1) Limiting Conditions of Operations (LCO). TS 3.2.f states, 'The reactor shall not be operated unless the following rod run-in functions are operable.' Specifically, the rod run-in function that occurs when regulating blade position is less than or equal to 10 percent withdrawn was not operable as required by TS 3.2.f.8.</br>The regulating blade drive mechanism was repaired, post-maintenance operability testing was conducted satisfactorily, and permission from the Reactor Facility Director was obtained prior to the reactor returning to operation later on 4/9/20. Currently, MURR is at 10 MW. A detailed event report will follow within 14 days as required by MURR TS 6.6.c(3).n 14 days as required by MURR TS 6.6.c(3). +
19:32:00, 9 April 2020 +
54,660 +
17:30:00, 10 April 2020 +
19:32:00, 9 April 2020 +
On 4/9/20, at 1432 CDT, the University of … On 4/9/20, at 1432 CDT, the University of Missouri-Columbia Research Reactor (MURR) was shut down due to the failure of the geared rotary limit switch assembly to move with corresponding regulating blade drive mechanism movement. This email is a required notification per MURR Technical Specification (TS) 6.6.c(1) to report to the NRC Operations Center that an Abnormal Occurrence, as defined by MURR TS 1.1, had occurred. MURR was not in compliance with one (1) Limiting Conditions of Operations (LCO). TS 3.2.f states, 'The reactor shall not be operated unless the following rod run-in functions are operable.' Specifically, the rod run-in function that occurs when regulating blade position is less than or equal to 10 percent withdrawn was not operable as required by TS 3.2.f.8.</br>The regulating blade drive mechanism was repaired, post-maintenance operability testing was conducted satisfactorily, and permission from the Reactor Facility Director was obtained prior to the reactor returning to operation later on 4/9/20. Currently, MURR is at 10 MW. A detailed event report will follow within 14 days as required by MURR TS 6.6.c(3).n 14 days as required by MURR TS 6.6.c(3). +
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00:00:00, 10 April 2020 +
R-103 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
16:43:59, 15 January 2021 +
17:30:00, 10 April 2020 +
0.915 d (21.97 hours, 0.131 weeks, 0.0301 months) +
19:32:00, 9 April 2020 +
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