ENS 41441
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ENS Event | |
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03:11 Feb 25, 2005 | |
Title | Esf Actuation Following Trip of Reactor Protection Motor-Generator Set |
Event Description | A trip of the "A" RPS M-G set resulted in an "A" Group 2 isolation and startup of the standby gas treatment system. There was a preliminary report of a possible fire/smoke smell in the vicinity of the M-G set. However, when an operator reported to the location there was no observed fire. The fire brigade was also dispatched but found no fire or smoke in the M-G set area.
The licensee is preparing to place the RPS on its alternate power supply. This will allow the Group 2 isolations and standby gas treatment system actions to be reset. The cause of the M-G set trip is still under investigation. The licensee will be notifying the NRC Resident Inspector as well as state and local authorities. |
Where | |
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Monticello ![]() Minnesota (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
LER: | 05000263/LER-2005-002 |
Time - Person (Reporting Time:+-4.53 h-0.189 days <br />-0.027 weeks <br />-0.00621 months <br />) | |
Opened: | Kurt Arndt 22:39 Feb 24, 2005 |
NRC Officer: | Bill Huffman |
Last Updated: | Feb 24, 2005 |
41441 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (90 %) |
After | Power Operation (90 %) |
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