ENS 47171

v t e ENS Event
17:08 Jun 21, 2011
Title	60-Day Optional Telephonic Notification of Invalid Specified System Actuation
Event Description	Invalid Actuation of Turbine Driven Auxiliary Feedwater (TDAFW) pump. This telephone notification is being made under reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1). On 6/21/11 at 1308 EDT, during maintenance activities for replacement of relay UVTXSB/1732, associated with 6.9kv Emergency Bus 1B-SB undervoltage trip circuitry, an automatic start of the Turbine Driven Auxiliary Feedwater (TDAFW) pump occurred while using a new procedure, CM-E0032. At the time of the event, all steam generator levels were normal. The TDAFW pump was secured by Operations on 6/21/11 at 1311 EDT. No actual condition existed that would require an automatic start of the TDAFW pump and therefore this event has been classified as an invalid actuation. The start of the TDAFW is considered a complete train actuation. The system started and functioned successfully. The licensee has notified the NRC Resident Inspector.

ENS 47171 +/-
Where
Harris North Carolina (NRC Region 2)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+1412.58 h58.858 days <br />8.408 weeks <br />1.935 months <br />)
Opened:	Tyler Halye 13:43 Aug 19, 2011
NRC Officer:	Howie Crouch
Last Updated:	Aug 19, 2011
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v • d • e

v t e Emergency Notification System
Harris with 10 CFR 50.73(a)(1), Submit an LER
WEEKMONTHYEAR2025-10-21T15:01:00 [Table view]
[ENS list for Harris]

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