ENS 52564: Difference between revisions

v t e ENS Event
05:53 Feb 18, 2017
Title	Automatic Reactor Scram Resulting from Feedwater Regulating Valve Failure
Event Description	This notification is being provided in accordance with 10CFR 50.72(b)(2)(iv)(B). On February 17, 2017 at 2353 CST, Unit 1 Reactor Automatic Scram signal was received due to Turbine Control Valves Fast Closure. The turbine trip was due to receipt of Level 8 Trip due to a failure of the Feedwater Regulating Valve to Full open. Plant is in a stable condition with reactor pressure being maintained by the Turbine Bypass valves. Reactor water level is being controlled with Feedwater thru the Low Flow Feedwater Regulating Valve. Further investigation into the cause of the event is in progress. All control rods fully inserted, and decay heat is being removed via steam to the main condenser using bypass valves. The licensee has notified the NRC Resident Inspector. * * UPDATE FROM BROCK POLLMANN TO HOWIE CROUCH AT 1721 EDT ON 4/14/17 * * * Upon further review of the event data, it was determined that the Nuclear Station Operator (NSO) had initiated a manual scram, which was followed by a Turbine Control Valve (TCV) fast closure automatic scram when the turbine tripped. The licensee has notified the NRC Resident Inspector. Notified R3DO (Jeffers).

ENS 52564 +/-
Where
LaSalle Illinois (NRC Region 3)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
Time - Person (Reporting Time:+-2.92 h-0.122 days <br />-0.0174 weeks <br />-0.004 months <br />)
Opened:	Wayne Clayton 02:58 Feb 18, 2017
NRC Officer:	Dong Park
Last Updated:	Apr 14, 2017
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v • d • e

v t e Emergency Notification System
LaSalle with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2025-11-02T19:46:00 [Table view]
[ENS list for LaSalle]

@@ Line 16: / Line 16: @@
 | event date = 02/17/2017 23:53 CST
 | last update date = 04/14/2017
-| title = Automatic Reactor Scram Resulting From Feedwater Regulating Valve Failure
+| title = Automatic Reactor Scram Resulting from Feedwater Regulating Valve Failure
 | event text = This notification is being provided in accordance with 10CFR 50.72(b)(2)(iv)(B).
 On February 17, 2017 at 2353 CST, Unit 1 Reactor Automatic Scram signal was received due to Turbine Control Valves Fast Closure. The turbine trip was due to receipt of Level 8 Trip due to a failure of the Feedwater Regulating Valve to Full open. Plant is in a stable condition with reactor pressure being maintained by the Turbine Bypass valves. Reactor water level is being controlled with Feedwater thru the Low Flow Feedwater Regulating Valve. Further investigation into the cause of the event is in progress.

Latest revision as of 20:42, 1 March 2018