ENS 55038: Difference between revisions

v t e ENS Event
13:51 Dec 16, 2020
Title	Automatic Reactor Trip Due to Generator Lockout
Event Description	On December 16, 2020 at 0851 EST, with Harris Nuclear Plant Unit 1 in Mode 1 at 80 percent power, an automatic reactor trip occurred due to lockout of the main generator. The trip was not complex, with all systems responding normally post-trip. The initial assessment of this event indicates that there was a ground fault on the 'B' train of the non-safety electrical distribution system that caused the main generator lockout. Steam generator levels are being maintained by normal feedwater through the feedwater regulator bypass valves. Decay heat is being removed by using the condenser steam dump flow path. Due to the unplanned Reactor Protection System actuation while critical, this event is being reported as a four hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B). This condition does not affect the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. All rods inserted into the core during the trip. The electrical grid is stable and all safe shutdown equipment is available for service. No reliefs lifted during the transient.

ENS 55038 +/-
Where
Harris North Carolina (NRC Region 2)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
Time - Person (Reporting Time:+-1.53 h-0.0638 days <br />-0.00911 weeks <br />-0.0021 months <br />)
Opened:	Chris Hayes 12:19 Dec 16, 2020
NRC Officer:	Howie Crouch
Last Updated:	Dec 16, 2020
55038 - 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 55038\u003C/a\u003E - \u003Ca href=\"/Harris\" title=\"Harris\"\u003EHarris\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 Lockout\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 55038 - Harris\n","link":"","lat":35.63344166666667,"lon":-78.95586666666667,"icon":"/w/images/7/75/Duke_Energy_icon.png"}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Harris with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2024-05-30T23:49:00 [Table view]
[ENS list for Harris]

@@ Line 10: / Line 10: @@
 | utype = W-3-LP
 | cfr = 10 CFR 50.72(b)(2)(iv)(B)
-| emergency class =  Non Emergency
+| emergency class = Non Emergency
 | notification date = 12/16/2020 12:19
 | notification by = Chris Hayes

Latest revision as of 12:06, 15 January 2021