ENS 56047

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v t e ENS Event
00:49 Jul 23, 2022
Title	Invalid Actuation of Auxiliary Feedwater
Event Description	The following information was provided by the licensee via email: This 60-day telephone notification is being made under the reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1) to describe an invalid actuation of the auxiliary feedwater system. At 1949 Central Daylight Time (CDT), on 7/22/22, an invalid actuation of the auxiliary feedwater system occurred due to human error. At the time of the event, Wolf Creek Generating Station was coming out of a forced outage. Plant conditions were 47 percent power with operators increasing power approximately 10 percent per hour. At this power level there was one main feedwater pump in service and Operations was performing the procedure to place the second main feedwater pump into service. A control room operator was verifying that the control oil switches were not tripped for the main feedwater pumps by verifying the bulbs for both the 'A' and 'B' trains were not lit. To verify the unlit bulbs were not burnt out, the operator was pushing the lamp test buttons. The operator successfully verified the 'A' train, but on the 'B' train the operator mistakenly pushed the bi-stable which is located directly above the bulb rather than the lamp test button. This bi-stable is the low oil pressure switch for the 'A' main feedwater pump. Because the second feedwater pump was not running yet, this caused a 'two out of two' signal for low oil pressure and caused an auxiliary feedwater system actuation. The auxiliary feedwater system responded correctly and was returned to standby condition. The Senior Resident Inspector has been notified.

ENS 56047 +/-
Where
Wolf Creek Kansas (NRC Region 4)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+589.33 h24.555 days <br />3.508 weeks <br />0.807 months <br />)
Opened:	Jason Kunst 14:09 Aug 16, 2022
NRC Officer:	Brian P. Smith
Last Updated:	Aug 16, 2022
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v • d • e

v t e Emergency Notification System
Wolf Creek with 10 CFR 50.73(a)(1), Submit an LER
WEEKMONTHYEAR2022-07-23T00:49:00 [Table view]
[ENS list for Wolf Creek]

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