ENS 54660: Difference between revisions
Jump to navigation
Jump to search
StriderTol (talk | contribs) (StriderTol Bot insert) |
StriderTol (talk | contribs) (StriderTol Bot change) |
||
| Line 10: | Line 10: | ||
| utype = | | utype = | ||
| cfr = Non | | cfr = Non | ||
| emergency class = | | emergency class = Non Emergency | ||
| notification date = 04/10/2020 17:30 | | notification date = 04/10/2020 17:30 | ||
| notification by = Bruce Meffert | | notification by = Bruce Meffert | ||
| NRC officer = Bethany Cecere | | NRC officer = Bethany Cecere | ||
| event date = 04/09/2020 14:32 CDT | | event date = 04/09/2020 14:32 CDT | ||
| last update date = 04/10/2020 | | last update date = 04/10/2020 | ||
| title = Abnormal Occurrence | | title = Abnormal Occurrence | ||
| event text = 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. | | event text = 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 Specifically, the rod run-in function that occurs when regulating blade position is less than or equal to 10 percent withdrawn was not operable as required by TS 3.2.f.8. | ||
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). | |||
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. | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2020/20200413en.html#en54660 | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2020/20200413en.html#en54660 | ||
}} | }} | ||
{{ENS-Nav}} | {{ENS-Nav}} | ||
Latest revision as of 11:43, 15 January 2021
| Where | |
|---|---|
| Univ Of Missouri-Columbia Columbia, Missouri (NRC Region 0) | |
| License number: | R-103 |
| Reporting | |
| Non | |
| Time - Person (Reporting Time:+21.97 h0.915 days <br />0.131 weeks <br />0.0301 months <br />) | |
| Opened: | Bruce Meffert 17:30 Apr 10, 2020 |
| NRC Officer: | Bethany Cecere |
| Last Updated: | Apr 10, 2020 |
| 54660 - NRC Website | |