ENS 40108: Difference between revisions

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Latest revision as of 21:25, 1 March 2018

v t e ENS Event
07:01 Aug 22, 2003
Title	Invalid Actuation of the "a" Standby Service Water System
Event Description	On August 22,2003, at 0201 Central Time, while operating at 100 percent power, Grand Gulf Nuclear Station experienced an invalid actuation of the 'A' Standby Service Water (SSW) System. A failed DC/DC converter power supply in Panel 1H22P400 for the Division 1 Diesel Generator (DG) resulted in a faulty DG speed monitor signal indicating DG speed greater than 450 revolutions per minute (RPM). The DG was not running since it was already inoperable due to a planned outage. The event occurred during restoration activities to prepare the DG for retest. The invalid DG start signal caused the outside air fan and SSW 'A' to auto start as designed to support DG operation. SSW 'A' started and functioned as designed. No other actuations occurred and all support systems functioned properly. The licensee notified the NRC Resident Inspector.

ENS 40108 +/-
Where
Grand Gulf Mississippi (NRC Region 4)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+133.67 h5.57 days <br />0.796 weeks <br />0.183 months <br />)
Opened:	Gary Ingram 20:41 Aug 27, 2003
NRC Officer:	Arlon Costa
Last Updated:	Aug 27, 2003
40108 - 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 40108\u003C/a\u003E - \u003Ca href=\"/Grand_Gulf\" title=\"Grand Gulf\"\u003EGrand Gulf\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EInvalid Actuation of the \"a\" Standby Service Water System\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 40108 - Grand Gulf\n","link":"","lat":32.009233333333334,"lon":-91.04695833333334,"icon":"/w/images/7/79/Entergy_icon.png"}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Grand Gulf with 10 CFR 50.73(a)(1), Submit an LER
WEEKMONTHYEAR2003-09-27T06:18:00 [Table view]
[ENS list for Grand Gulf]

@@ Line 16: / Line 16: @@
 | event date = 08/22/2003 02:01 CDT
 | last update date = 08/27/2003
-| title = Invalid Actuation Of The "A" Standby Service Water System
+| title = Invalid Actuation of the "a" Standby Service Water System
 | event text = On August 22,2003, at 0201 Central Time, while operating at 100 percent power, Grand Gulf Nuclear Station experienced an invalid actuation of the 'A' Standby Service Water (SSW) System.  A failed DC/DC converter power supply in Panel 1H22P400 for the Division 1 Diesel Generator (DG) resulted in a faulty DG speed monitor signal indicating DG speed greater than 450 revolutions per minute (RPM).  The DG was not running since it was already inoperable due to a planned outage.  The event occurred during restoration activities to prepare the DG for retest.  The invalid DG start signal caused the outside air fan and SSW 'A' to auto start as designed to support DG operation.  SSW 'A' started and functioned as designed.  No other actuations occurred and all support systems functioned properly.
 The licensee notified the NRC Resident Inspector.