ENS 52992: Difference between revisions

v t e ENS Event
09:43 Sep 26, 2017
Title	Automatic Start of the 2B Emergency Diesel Due to a Valid Undervoltage Signal
Event Description	At approximately 0543 [EDT], while [recovering from the performance of] 2B Emergency Diesel Generator and ESFAS testing, a [subsequent] valid undervoltage actuation signal was sent to the 2B Emergency Diesel Generator (EDG). The 2B AC emergency bus (2BA03) was load shed, the 2B EDG automatically started, and tied to 2BA03. The 2BA03 bus was loaded by the automatic load sequencer. The actuation was identified by the Control Room operators and the 2B EDG was locally monitored while in service. This actuation is reportable due to the automatic actuation of a system listed in 10 CFR 50.72(b)(3)(iv)(B). The reactor was not critical at the time of the event and not challenged throughout the event. Decay heat removal and spent fuel pool cooling were not challenged throughout the event. The NRC Resident Inspector has been notified. The cause of the undervoltage condition is under investigation.

ENS 52992 +/-
Where
Vogtle Georgia (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(iv)(A), System Actuation
Time - Person (Reporting Time:+1.33 h0.0554 days <br />0.00792 weeks <br />0.00182 months <br />)
Opened:	Kevin Lowe 11:03 Sep 26, 2017
NRC Officer:	Howie Crouch
Last Updated:	Sep 26, 2017
52992 - 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 52992\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 Start of the 2B Emergency Diesel Due to a Valid Undervoltage Signal\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 52992 - 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)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2024-09-17T05:27:00 [Table view]
[ENS list for Vogtle]

@@ Line 16: / Line 16: @@
 | event date = 09/26/2017 05:43 EDT
 | last update date = 09/26/2017
-| title = Automatic Start Of The 2B Emergency Diesel Due To A Valid Undervoltage Signal
+| title = Automatic Start of the 2B Emergency Diesel Due to a Valid Undervoltage Signal
 | event text = At approximately 0543 [EDT], while [recovering from the performance of] 2B Emergency Diesel Generator and ESFAS testing, a [subsequent] valid undervoltage actuation signal was sent to the 2B Emergency Diesel Generator (EDG). The 2B AC emergency bus (2BA03) was load shed, the 2B EDG automatically started, and tied to 2BA03. The 2BA03 bus was loaded by the automatic load sequencer. The actuation was identified by the Control Room operators and the 2B EDG was locally monitored while in service.
 This actuation is reportable due to the automatic actuation of a system listed in 10 CFR 50.72(b)(3)(iv)(B).

Latest revision as of 21:41, 1 March 2018