ENS 42506: Difference between revisions

v t e ENS Event
04:26 Apr 17, 2006
Title	Unit 1 Manually Tripped Due to Failure of a Main Feed Regulating Valve to Control Steam Generator Level
Event Description	Unit 1 reactor was manually tripped from 33% RTP due to the Loop 3 Main Feed Regulating Valve (MFRV) 1LV-0530 not controlling steam generator level in manual or AUTO. A unit shutdown was in progress at the time of the trip due to concerns with the Loop 3 MFRV. The unit shutdown had commenced from 100% power on 04/16/2006 at 1603 hrs. All systems functioned as required on the reactor trip including a feedwater isolation and the Loop 3 MFRV closing as expected. The unit is presently in Mode 3 at normal operating temperature and pressure. An investigation team is being assembled concerning the Loop 3 MFRV. All control rods fully inserted. No primary or secondary reliefs/safeties lifted during the transient. Unit 1 is currently in Mode 3 Hot Standby controlling Steam Generator Water Level using Auxiliary Feedwater supplied by both Motor Driven and the Steam Driven pumps. Decay Heat is being removed via the Bypass Valves to the Main Condenser. Offsite power is stable and all EDGs are available, if necessary. The licensee informed the NRC Resident Inspector.

ENS 42506 +/-
Where
Vogtle Georgia (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:+-3.1 h-0.129 days <br />-0.0185 weeks <br />-0.00425 months <br />)
Opened:	Steve Phillips 01:20 Apr 17, 2006
NRC Officer:	Steve Sandin
Last Updated:	Apr 17, 2006
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v • d • e

v t e Emergency Notification System
Vogtle with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2024-09-17T05:27:00 [Table view]
[ENS list for Vogtle]

@@ Line 16: / Line 16: @@
 | event date = 04/17/2006 00:26 EDT
 | last update date = 04/17/2006
-| title = Unit 1 Manually Tripped Due To Failure Of A Main Feed Regulating Valve To Control Steam Generator Level
+| title = Unit 1 Manually Tripped Due to Failure of a Main Feed Regulating Valve to Control Steam Generator Level
 | event text = Unit 1 reactor was manually tripped from 33% RTP due to the Loop 3 Main Feed Regulating Valve (MFRV) 1LV-0530 not controlling steam generator level in manual or AUTO.
 A unit shutdown was in progress at the time of the trip due to concerns with the Loop 3 MFRV. The unit shutdown had commenced from 100% power on 04/16/2006 at 1603 hrs.

v t e Unit 1
W-4-LP
Reactor critical	Critical
Scram	Yes, Manual Scram
Before	Power Operation (33 %)
After	Hot Standby (0 %)

ENS 42506: Difference between revisions

Latest revision as of 21:18, 1 March 2018

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ENS 42506: Difference between revisions

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