ENS 44358: Difference between revisions

v t e ENS Event
01:58 Jul 22, 2008
Title	Loss of Accident Mitigation Capabilities Due to Two Emergency Diesel Generators Out of Service
Event Description	On 7/20/08 at 1757, the 1B Emergency Diesel generator was voluntarily removed from service for a planned exhaust header replacement. The 1B Emergency Diesel remains out of service and is anticipated to be returned to service on 7/26/08. On 7/21/08 at 2058, the 1-2A Emergency Diesel generator was declared inoperable due to excessive amounts of water present in the diesel lube oil system. The combination of these two diesels being out of service results in two emergency diesels, one in each train, being inoperable for Farley Unit One. This represents a Unit One loss of safety function for mitigating the consequences of an accident in the event of a loss of off-site power. Farley Unit Two is affected only by the 1-2A Emergency Diesel and is maintaining a B-Train Emergency Diesel operable. The 1-2A Emergency Diesel is suspected of having a lube oil heat exchanger tube leak. Confirmation of the tube leak and repairs are anticipated to take three to four days. The loss of two EDGs places Unit One in an 8-hr plant shutdown action statement which will require the unit to initiate shutdown by 0458 CDT on July 22, 2008 and be in hot standby by 1058 CDT. Unit Two is in a 10-day non-shutdown action statement as a result of the loss of the 1-2A Emergency Diesel Generator. The licensee has notified the NRC Resident Inspector. * * UPDATE FROM HOBSON TO KNOKE AT 1009 ON 07/22/08 * * * On 7/20/08 at 1757, the 1 B Emergency Diesel Generator was voluntarily removed from service for a planned exhaust header replacement. On 7/21/08 at 2058, the 1-2A emergency Diesel Generator was declared inoperable per Technical Specification 3.8.1 due to excessive amounts of water present in the diesel lube oil system. The combination of both diesels out of service required entry into Technical Specification 3.8.1 Condition E. With both an 'A' train and a 'B' train Emergency Diesel Generators inoperable, a loss of safety function exists. A technical specification required shutdown from Mode 1 to Mode 3 was commenced at 0541 CST in accordance with Technical Specification 3.8.1 Condition F. Unit 1 is required to be in Mode 3 prior to 1058 CST. Unit 2 is affected by the 1-2A Emergency Diesel Generator being removed from service. However, there is no loss of safety function on Unit 2 because the B train Emergency Diesel Generator is operable. Unit 2 remains in Mode 1, 100% power. Licensee will notify the NRC Resident Inspector. Notified R2DO (Blamey)

ENS 44358 +/-
Where
Farley Alabama (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown
LER:	05000348/LER-2008-003
Time - Person (Reporting Time:+2.2 h0.0917 days <br />0.0131 weeks <br />0.00301 months <br />)
Opened:	Jim Hunter 04:10 Jul 22, 2008
NRC Officer:	Howie Crouch
Last Updated:	Jul 22, 2008
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v • d • e

v t e Emergency Notification System
Farley with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown
WEEKMONTHYEAR2016-12-07T19:43:00 [Table view]
[ENS list for Farley]

@@ Line 16: / Line 16: @@
 | event date = 07/21/2008 20:58 CDT
 | last update date = 07/22/2008
-| title = Loss Of Accident Mitigation Capabilities Due To Two Emergency Diesel Generators Out Of Service
+| title = Loss of Accident Mitigation Capabilities Due to Two Emergency Diesel Generators Out of Service
 | event text = On 7/20/08 at 1757, the 1B Emergency Diesel generator was voluntarily removed from service for a planned exhaust header replacement. The 1B Emergency Diesel remains out of service and is anticipated to be returned to service on 7/26/08.
 On 7/21/08 at 2058, the 1-2A Emergency Diesel generator was declared inoperable due to excessive amounts of water present in the diesel lube oil system.

v t e Unit 1
W-3-LP
Reactor critical	Critical
Scram	No
Before	Power Operation (100 %)
After	Power Operation (100 %)

ENS 44358: Difference between revisions

Latest revision as of 21:14, 1 March 2018

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ENS 44358: Difference between revisions

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