ENS 53123: Difference between revisions
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| emergency class = Non Emergency | | emergency class = Non Emergency | ||
| notification date = 12/17/2017 05:48 | | notification date = 12/17/2017 05:48 | ||
| retracted = Yes | |||
| notification by = Alan Schultz | | notification by = Alan Schultz | ||
| NRC officer = Andrew Waugh | | NRC officer = Andrew Waugh | ||
| event date = 12/17/2017 03:16 EST | | event date = 12/17/2017 03:16 EST | ||
| last update date = | | last update date = 01/29/2018 | ||
| title = High Pressure Coolant Injection (Hpci) System Declared Inoperable | | title = High Pressure Coolant Injection (Hpci) System Declared Inoperable | ||
| event text = On December 17, 2017 | | event text = On December 17, 2017 at 0316 EST, the Unit 2 HPCI system was isolated and declared inoperable due to a packing failure of the HPCI Turbine Steam Supply Valve (i.e., 2-E41-F001). Isolation of the HPCI system due to the packing failure prevents the HPCI system from performing its design safety function. As such, this event is being reported in accordance with 10 CFR 50.72(b)(3)(v)(D) as a condition that at the time of discovery could have prevented the fulfillment of the safety function of a system that is needed to mitigate the consequences of an accident. | ||
Unit 2 HPCI system has been isolated and depressurized. | Unit 2 HPCI system has been isolated and depressurized. The HPCI system will remain inoperable until the valve can be repaired. | ||
The safety significance of this condition is minimal. | The safety significance of this condition is minimal. All other Emergency Core Cooling Systems (ECCS) and the Reactor Core Isolation Cooling (RCIC) system remain operable. | ||
This event did not result in any adverse impact to the health and safety of the public. | This event did not result in any adverse impact to the health and safety of the public. | ||
The NRC | The NRC Resident Inspector has been notified. | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/ | * * * RETRACTION ON 1/29/18 AT 1514 EST FROM MARK TURKAL TO DONG PARK * * * | ||
Based upon further evaluation, Duke Energy is retracting Event Notification 53123. Engineering has determined that the packing failure of the HPCI Turbine Steam Supply Valve did not prevent the HPCI system from performing its safety function. Environmental conditions resulting from the steam leak would not have caused automatic HPCI isolation or otherwise have degraded HPCI operation. Additionally, the amount of steam diverted through the packing leak was negligible with respect to total steam flow and did not affect HPCI system performance. HPCI would have remained operable throughout its entire mission time. Therefore, this condition does not represent an event or condition that could have prevented fulfillment of a safety function needed to mitigate the consequences of an accident and is not reportable in accordance with 10 CFR 50.72(b)(3)(v)(D). | |||
The NRC Resident Inspector was notified of this retraction. | |||
Notified R2DO (Heisserer). | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20180130en.html#en53123 | |||
}}{{unit info | }}{{unit info | ||
| Unit = 2 | | Unit = 2 | ||
Latest revision as of 08:30, 1 January 2019
| Where | |
|---|---|
Brunswick  North Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+-2.47 h-0.103 days <br />-0.0147 weeks <br />-0.00338 months <br />) | |
| Opened: | Alan Schultz 05:48 Dec 17, 2017 |
| NRC Officer: | Andrew Waugh |
| Last Updated: | Jan 29, 2018 |
| 53123 - NRC Website
| |
Brunswick with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |