ENS 49779
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ENS Event | |
---|---|
08:30 Jan 31, 2014 | |
Title | Technical Specification Required Shutdown Due to Degradation of the Pressurizer Proportional Heaters Group 1 |
Event Description | Operators commenced a Technical Specification required shutdown due a 480 volt supply breaker trip resulting in degradation of the Pressurizer Proportional Heaters Group 1. The licensee plans on making a containment entry to investigate the cause of the breaker trip.
The B-Emergency Diesel-Generator is currently inoperable for planned maintenance. Unit 2 is currently ramping down and proceeding to a shutdown. The plant is in a normal electrical configuration. There is no indication of any primary to secondary leakage. Unit 3 is unaffected. The licensee notified the NRC Resident Inspector. |
Where | |
---|---|
Millstone Connecticut (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
LER: | 05000336/LER-2014-001 |
Time - Person (Reporting Time:+-4.35 h-0.181 days <br />-0.0259 weeks <br />-0.00596 months <br />) | |
Opened: | Fred Perkins 04:09 Jan 31, 2014 |
NRC Officer: | Vince Klco |
Last Updated: | Jan 31, 2014 |
49779 - NRC Website
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Unit 2 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (31 %) |
WEEKMONTHYEARENS 544492019-12-18T00:29:00018 December 2019 00:29:00
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