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Event Notification Report for August 2, 2017

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
08/01/2017 - 08/02/2017

** EVENT NUMBERS **

Power Reactor	Event Number: 52881
Facility: DUANE ARNOLD Region: 3 State: IA Unit: [1] [ ] [ ] RX Type: [1] GE-4 NRC Notified By: MARK BUSSELL HQ OPS Officer: BETHANY CECERE	Notification Date: 08/01/2017 Notification Time: 17:00 [ET] Event Date: 08/01/2017 Event Time: 09:34 [CDT] Last Update Date: 08/01/2017
Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION	Person (Organization): RICHARD SKOKOWSKI (R3DO)

Unit	SCRAM Code	RX CRIT	Initial PWR	Initial RX Mode	Current PWR	Current RX Mode
1	N	Y	99	Power Operation	99	Power Operation

Event Text

HIGH PRESSURE COOLANT INJECTION STEAM SUPPLY VALVE FAILED TO REPOSITION

"At 0934 CDT, while appropriately removed from service for pre-planned testing, the High Pressure Coolant Injection (HPCI) inboard steam isolation valve, MO-2238, valve position indication was found to be inadequate. As a result, MO-2238 was declared inoperable in accordance with Technical Specification (TS) 3.6.1.3. This resulted in a condition that caused the HPCI system to be inoperable.

"The cause of the inadequate valve position indication is currently being investigated. This report is being made pursuant to 10 CFR 50.72(b)(3)(v)(D).

"The NRC Resident Inspector has been informed."

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