ENS 43313: Difference between revisions

v t e ENS Event
14:24 Apr 23, 2007
Title	Automatic Reactor Trip Due to Generator Ground Relay Actuation
Event Description	Vogtle Unit 2 tripped from 53% power due to a turbine trip /P9 reactor trip RPS actuation during power ascension following completion of refueling outage 2R12. Initial investigation indicates that a generator neutral ground relay actuated causing an automatic main generator turbine trip. No visual damage is apparent on any plant equipment. All systems responded as expected. Both motor driven auxiliary feedwater pumps and the turbine driven started on lo-lo steam generator level and AMSAC. The NRC Resident Inspector was notified. All control rods fully inserted upon RPS actuation, the atmospheric relief valves lifted momentarily and reseated as expected, and no safety valves lifted. After the trip, steam generator level was being maintained with auxiliary feed pumps and steam was being dumped to the condenser. The plant was placed in the normal shutdown electrical lineup.

ENS 43313 +/-
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:+-2.98 h-0.124 days <br />-0.0177 weeks <br />-0.00408 months <br />)
Opened:	Mark Slivka 11:25 Apr 23, 2007
NRC Officer:	Steve Sandin
Last Updated:	Apr 23, 2007
43313 - 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 43313\u003C/a\u003E - \u003Ca href=\"/Vogtle\" title=\"Vogtle\"\u003EVogtle\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EAutomatic Reactor Trip Due to Generator Ground Relay Actuation\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 43313 - Vogtle\n","link":"","lat":33.13062222222222,"lon":-81.77135277777778,"icon":"/w/images/1/14/Southern_Nuclear_icon.png"}],"imageoverlays":null}
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
WEEKMONTHYEAR2024-07-09T01:25:00 [Table view]
[ENS list for Vogtle]

@@ Line 16: / Line 16: @@
 | event date = 04/23/2007 10:24 EDT
 | last update date = 04/23/2007
-| title = Automatic Reactor Trip Due To Generator Ground Relay Actuation
+| title = Automatic Reactor Trip Due to Generator Ground Relay Actuation
 | event text = Vogtle Unit 2 tripped from 53% power due to a turbine trip /P9 reactor trip RPS actuation during power ascension following completion of refueling outage 2R12.  Initial investigation indicates that a generator neutral ground relay actuated causing an automatic main generator turbine trip.  No visual damage is apparent on any plant equipment.
 All systems responded as expected.  Both motor driven auxiliary feedwater pumps and the turbine driven started on lo-lo steam generator level and AMSAC.

Latest revision as of 22:16, 1 March 2018