ENS 50524: Difference between revisions

v t e ENS Event
06:51 Oct 12, 2014
Title	Automatic Reactor Scram Due to Decreasing Reactor Water Level
Event Description	Today at approximately 0250 (EDT) [on 10/12/14], during a planned reactor power ascension with reactor power at approximately 1% of rated thermal power, reactor water level began lowering. Operators inserted a manual SCRAM at 0251 (EDT) in accordance with station procedures. The cause of the lowering reactor level is currently under investigation. All rods inserted into the core and all systems functioned as expected during the scram. No electromatic (EMRVs) or safety relief valves lifted during the transient. The plant is currently shutdown and plant parameters are stable. This event is reportable per 10CFR50.72(b)(2)(iv)(B) - 'any event or condition that results in actuation of the reactor protection system (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.' Decay heat is being released to the main condenser and normal offsite power is being maintained. The licensee has notified the NRC Resident Inspector. * * UPDATE PROVIDED BY JOSH MCGUIRE TO JEFF ROTTON AT 1520 EDT ON 10/17/2014 * * * An automatic SCRAM occurred at 0251 EDT, moments before operators inserted a manual SCRAM in accordance with station procedures. The licensee notified the NRC Resident Inspector. Notified R1DO (Cook).

ENS 50524 +/-
Where
Oyster Creek New Jersey (NRC Region 1)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
LER:	05000219/LER-2014-006
Time - Person (Reporting Time:+-1.48 h-0.0617 days <br />-0.00881 weeks <br />-0.00203 months <br />)
Opened:	Jim Ritchie 05:22 Oct 12, 2014
NRC Officer:	John Shoemaker
Last Updated:	Oct 17, 2014
50524 - NRC Website Loading map... {"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"350px","height":"250px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":6,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca class=\"mw-selflink selflink\"\u003EENS 50524\u003C/a\u003E - \u003Ca href=\"/Oyster_Creek\" title=\"Oyster Creek\"\u003EOyster Creek\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EAutomatic Reactor Scram Due to Decreasing Reactor Water Level\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 50524 - Oyster Creek\n","link":"","lat":39.81436111111111,"lon":-74.20560833333333,"icon":""}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Oyster Creek with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2017-07-03T14:15:00 [Table view]
[ENS list for Oyster Creek]

@@ Line 16: / Line 16: @@
 | event date = 10/12/2014 02:51 EDT
 | last update date = 10/17/2014
-| title = Automatic Reactor Scram Due To Decreasing Reactor Water Level
+| title = Automatic Reactor Scram Due to Decreasing Reactor Water Level
 | event text = Today at approximately 0250 (EDT) [on 10/12/14], during a planned reactor power ascension with reactor power at approximately 1% of rated thermal power, reactor water level began lowering.  Operators inserted a manual SCRAM at 0251 (EDT) in accordance with station procedures. The cause of the lowering reactor level is currently under investigation.
 All rods inserted into the core and all systems functioned as expected during the scram.  No electromatic (EMRVs) or safety relief valves lifted during the transient.  The plant is currently shutdown and plant parameters are stable.

Latest revision as of 21:49, 1 March 2018