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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 ** 52881 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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