ENS 45085
ENS Event | |
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05:15 Apr 9, 2009 | |
Title | Optional 60-Day Telephone Report of an Invalid Start of All Four Emergency Diesel Generators |
Event Description | This report is being made under 50.73(a)(2)(iv)(A).
At the time of the event, Unit 1 was Defueled/No Mode and Unit 2 was 100% Power/Mode 1. On 04/9/09 @ 0115 an invalid start of the four emergency diesel generators occurred. The actuation was caused by inadvertent actuation of the K609 relay. The K609 relay causes an emergency start of the diesel generators on a SI [Safety Injection] signal. The actuation of the K609 relay was caused by technicians inadvertently depressing the K609 relay latch pushbutton while working on a nearby K604 relay. The K609 relay is located just below the K604 relay in the same SSPS [Solid State Protection System] panel. The train actuated was both Train A and Train B for both Units 1 and 2. The system actuated was the emergency diesel generators. Complete train actuation occurred. The emergency diesel generators started successfully. The licensee has notified the NRC Resident Inspector. |
Where | |
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Sequoyah Tennessee (NRC Region 2) | |
Reporting | |
10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
Time - Person (Reporting Time:+1012.97 h42.207 days <br />6.03 weeks <br />1.388 months <br />) | |
Opened: | Norm Thomas 10:13 May 21, 2009 |
NRC Officer: | Howie Crouch |
Last Updated: | May 21, 2009 |
45085 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 551302021-01-11T16:52:00011 January 2021 16:52:00
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