ENS 52630: Difference between revisions

v t e ENS Event
04:14 Mar 23, 2017
Title	Automatic Start of Auxiliary Feed Water
Event Description	On March 23, 2017, at 0014 EDT, Watts Bar Nuclear Plant Unit 2 (WBN2) experienced an unplanned trip of both Turbine Driven Main Feed Pumps (TDMFP) following a loss of Main Condenser Vacuum. The trip of both TDMFPs caused an automatic start of both Motor Driven Auxiliary Feed Water Pumps and the Turbine Driven Auxiliary Feed Water Pump. [The] cause of the loss of Main Condenser Vacuum is currently under investigation. The plant was performing a normal startup, and had just synced the main generator to the grid. Subsequent to the event, the plant was transitioned to Mode 3. All rods are fully inserted. Decay heat is being removed via the atmospheric relief valves. Unit 1 remains in Mode 5 for a refueling outage. The licensee has notified the NRC Resident Inspector.

ENS 52630 +/-
Where
Watts Bar Tennessee (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(iv)(A), System Actuation
Time - Person (Reporting Time:+-1.43 h-0.0596 days <br />-0.00851 weeks <br />-0.00196 months <br />)
Opened:	Damon Fegley 02:48 Mar 23, 2017
NRC Officer:	Karl Diederich
Last Updated:	Mar 23, 2017
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v • d • e

v t e Emergency Notification System
Watts Bar with 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2024-07-08T19:21:00 [Table view]
[ENS list for Watts Bar]

@@ Line 16: / Line 16: @@
 | event date = 03/23/2017 00:14 EDT
 | last update date = 03/23/2017
-| title = Automatic Start Of Auxiliary Feed Water
+| title = Automatic Start of Auxiliary Feed Water
 | event text = On March 23, 2017, at 0014 EDT, Watts Bar Nuclear Plant Unit 2 (WBN2) experienced an unplanned trip of both Turbine Driven Main Feed Pumps (TDMFP) following a loss of Main Condenser Vacuum. The trip of both TDMFPs caused an automatic start of both Motor Driven Auxiliary Feed Water Pumps and the Turbine Driven Auxiliary Feed Water Pump. [The] cause of the loss of Main Condenser Vacuum is currently under investigation.
 The plant was performing a normal startup, and had just synced the main generator to the grid. Subsequent to the event, the plant was transitioned to Mode 3. All rods are fully inserted. Decay heat is being removed via the atmospheric relief valves.

Latest revision as of 21:43, 1 March 2018