ENS 43169
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ENS Event | |
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21:54 Feb 15, 2007 | |
Title | Unit 1 and Unit 2 Reactor Trip |
Event Description | At 1654 EST on 2-15-07, Oconee Units 1 & 2 tripped from 100% power. The cause of the trips is under investigation. Unit 1 experienced a partial loss of 4160 volt power [Non-Safety Related] which resulted in a loss of Main Feedwater. Emergency Feedwater started on Unit 1. Unit 2 remained on Main Feedwater. Reactor Coolant Pump power was not affected by the trip on either Unit. Post trip equipment response on Unit 2 was normal. On Unit 1, a second HPI pump auto-started due to a non-safety low seal flow signal [one normally running for normal RCS makeup].
Units 1 & 2 have been stabilized in Mode 3. Restoration of 4160 volt loads on Unit 1 is in progress. All Control rods fully inserted on both units. No PORVs or Safety valves lifted during the event for either unit. Both units are removing decay heat by steaming to the Main Condenser via the Turbine Bypass valves. Both units are in a normal shutdown electrical lineup. Unit 3 was not affected by this event. The licensee notified the NRC Resident Inspector. |
Where | |
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Oconee ![]() South Carolina (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
Time - Person (Reporting Time:+-2.9 h-0.121 days <br />-0.0173 weeks <br />-0.00397 months <br />) | |
Opened: | Rob Meixell 19:00 Feb 15, 2007 |
NRC Officer: | Jeff Rotton |
Last Updated: | Feb 15, 2007 |
43169 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | A/R |
Before | Power Operation (100 %) |
After | Hot Standby (0 %) |
Unit 2 | |
---|---|
Reactor critical | Critical |
Scram | A/R |
Before | Power Operation (100 %) |
After | Hot Standby (0 %) |
Oconee ![]() | |
WEEKMONTHYEARENS 571592024-06-03T04:51:0003 June 2024 04:51:00
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