ENS 54824: Difference between revisions
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| unit = 1 | | unit = 1 | ||
| utype = GE-6 | | utype = GE-6 | ||
| cfr = 10 CFR 50.72(b)(2)(iv)(B | | cfr = 10 CFR 50.72(b)(2)(iv)(B) | ||
| emergency class = | | emergency class = Non Emergency | ||
| notification date = 08/08/2020 05:34 | | notification date = 08/08/2020 05:34 | ||
| notification by = Gabriel Hargrove | | notification by = Gabriel Hargrove | ||
| Line 17: | Line 17: | ||
| last update date = 08/08/2020 | | last update date = 08/08/2020 | ||
| title = Reactor Scram Due to a Turbine High Pressure Control Valve Malfunction | | title = Reactor Scram Due to a Turbine High Pressure Control Valve Malfunction | ||
| event text = On August 8, 2020, at 0127 CDT, Grand Gulf Nuclear Station was manually shut down due to a turbine high pressure control valve malfunction. Reactor pressure is being controlled with bypass control valves to the main condenser. | | event text = On August 8, 2020, at 0127 CDT, Grand Gulf Nuclear Station was manually shut down due to a turbine high pressure control valve malfunction. Reactor pressure is being controlled with bypass control valves to the main condenser. Reactor level is being maintained with condensate and feedwater through startup level control. The plant is stable in MODE 3 and proceeding to cold shutdown. The cause of the 'D' high pressure control valve malfunction is under investigation at this time. | ||
All rods fully inserted and there were no complications. All systems responded as designed. | All rods fully inserted and there were no complications. All systems responded as designed. | ||
This event is being reported under 10 CFR 50.72(b)(2)(iv)(B), as any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical. | This event is being reported under 10 CFR 50.72(b)(2)(iv)(B), as any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical. | ||
Additionally, at 0159 CDT, with all rods fully inserted and after the 0127 CDT manual reactor Scram, an automatic valid RPS actuation signal was received. | Additionally, at 0159 CDT, with all rods fully inserted and after the 0127 CDT manual reactor Scram, an automatic valid RPS actuation signal was received. | ||
This event is also being reported under 10 CFR 50.72(b)(3)(iv)(A), as an event or condition that results in a valid actuation of any of the systems listed in 10 CFR 50.72(b)(3)(iv)(B). | This event is also being reported under 10 CFR 50.72(b)(3)(iv)(A), as an event or condition that results in a valid actuation of any of the systems listed in 10 CFR 50.72(b)(3)(iv)(B). | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2020/20200810en.html#en54824 | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2020/20200810en.html#en54824 | ||
}} | }} | ||
{{ENS-Nav}}[[Category:Power Reactor]] | {{ENS-Nav}}[[Category:Power Reactor]] | ||
Latest revision as of 11:28, 15 January 2021
| Where | |
|---|---|
Grand Gulf  Mississippi (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
| Time - Person (Reporting Time:+-0.88 h-0.0367 days <br />-0.00524 weeks <br />-0.00121 months <br />) | |
| Opened: | Gabriel Hargrove 05:34 Aug 8, 2020 |
| NRC Officer: | Brian Lin |
| Last Updated: | Aug 8, 2020 |
| 54824 - NRC Website
| |