ENS 52406: Difference between revisions

v t e ENS Event
03:24 Dec 4, 2016
Title	Automatic Reactor Trip Caused by Main Turbine Trip
Event Description	On 12/3/16 at 2224 EST, Calvert Cliffs Unit-2 experienced an automatic reactor trip from full power due to a leak in the Unit-2 Main Turbine Electro-Hydraulic Control (EHC) system. The EHC leak caused the Unit-2 Main Turbine governor valves to close, resulting in a turbine trip and automatic reactor trip. The site Outage Control Center is manned, and investigation into the cause of the leak is underway. Unit-2 remains stable in Mode 3 with normal heat removal. Unit-1 remains at full power and was not affected by the trip. The plant is in a normal shutdown electrical lineup. All Control rods fully inserted and no primary or secondary safety relief valves lifted during the trip. The licensee has notified the NRC Resident Inspector. The licensee will be notifying Calvert County.

ENS 52406 +/-
Where
Calvert Cliffs Maryland (NRC Region 1)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
Time - Person (Reporting Time:+-1.6 h-0.0667 days <br />-0.00952 weeks <br />-0.00219 months <br />)
Opened:	Ervin Lyson 01:48 Dec 4, 2016
NRC Officer:	Jeff Rotton
Last Updated:	Dec 4, 2016
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v • d • e

v t e Emergency Notification System
Calvert Cliffs with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2024-07-18T19:24:00 [Table view]
[ENS list for Calvert Cliffs]

@@ Line 16: / Line 16: @@
 | event date = 12/03/2016 22:24 EST
 | last update date = 12/04/2016
-| title = Automatic Reactor Trip Caused By Main Turbine Trip
+| title = Automatic Reactor Trip Caused by Main Turbine Trip
 | event text = On 12/3/16 at 2224 EST, Calvert Cliffs Unit-2 experienced an automatic reactor trip from full power due to a leak in the Unit-2 Main Turbine Electro-Hydraulic Control (EHC) system. The EHC leak caused the Unit-2 Main Turbine governor valves to close, resulting in a turbine trip and automatic reactor trip. The site Outage Control Center is manned, and investigation into the cause of the leak is underway. Unit-2 remains stable in Mode 3 with normal heat removal.
 Unit-1 remains at full power and was not affected by the trip.

Latest revision as of 21:43, 1 March 2018