ENS 53662: Difference between revisions

v t e ENS Event
04:00 Oct 11, 2018
Title	Actuation of Emergency Diesel Generator Due to Transformer Trip
Event Description	On 10/11/18 at 2304, with both Surry Units at 100% power, the 'A' Reserve Station Service Transformer (RSST) tripped on a pilot wire lockout. This resulted in electrical isolation of the 'A' RSST, the 'D' Transfer Bus and the Unit 1 'J' Emergency Bus. The #3 Emergency Diesel Generator (EDG) started and loaded on the Emergency Bus, as designed. Operations entered the appropriate Abnormal Procedures and stabilized the unit. All equipment operated as expected during the event. A report of a flash at the 'A' RSST was received (at approximately the time of the initiating event) but there were no reports of visible damage, smoke or fire from the RSST or any associated breakers on subsequent investigation. The #3 EDG is running with normal parameters. There was heavy wind/rain in the area associated with Tropical Storm Michael. All other electrical distribution systems are in a normal alignment. The organization is staffing to evaluate the lockout and required actions for recovery. No radiological consequences resulted from this event. This event is being reported IAW [in accordance with] 10 CFR 50.52(b)(3)(iv)(A) due to the actuation of the #3 EDG. The NRC Resident [Inspector] was notified

ENS 53662 +/-
Where
Surry Virginia (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(iv)(A), System Actuation
Time - Person (Reporting Time:+21.23 h0.885 days <br />0.126 weeks <br />0.0291 months <br />)
Opened:	Jeremy Riddick 01:14 Oct 12, 2018
NRC Officer:	Ossy Font
Last Updated:	Oct 12, 2018
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v • d • e

v t e Emergency Notification System
Surry with 10 CFR 50.72(b)(3)(iv)(A), System Actuation
WEEKMONTHYEAR2018-11-12T05:00:00 [Table view]
[ENS list for Surry]

@@ Line 24: / Line 24: @@
 No radiological consequences resulted from this event.
 This event is being reported IAW [in accordance with] 10 CFR 50.52(b)(3)(iv)(A) due to the actuation of the #3 EDG.
-The NRC Resident [Inspector] was notified"
+The NRC Resident [Inspector] was notified
-| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181012en.html#en53662
+| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181015en.html#en53662
 }}{{unit info
 | Unit =  1

Latest revision as of 01:01, 24 February 2020