ENS 53698: Difference between revisions
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| event date = 10/28/2018 00:00 CDT | | event date = 10/28/2018 00:00 CDT | ||
| last update date = 10/28/2018 | | last update date = 10/28/2018 | ||
| title = | | title = Automatic Reactor Scram During a Reactor Shutdown | ||
| event text = | | event text = At 0445 [CDT], with reactor power less than 1% rated thermal power on Instrument Range Monitor (IRM) ranges 6 and 7, Clinton Power Station received an automatic Reactor Protection System (RPS) actuation. The Reactor Scram Off Normal procedure was entered and all control rods were verified to be fully inserted. The apparent cause of the scram is cold water injection causing an upscale trip of the IRMs due to Motor Driven Reactor Feedwater Pump (MDRFP) Feedwater Regulating valve 1FW004 valve coming off the full shut seat momentarily. All systems responded appropriately following the scram and the plant is currently stable. Clinton Power Station will be proceeding to Mode 4 to support the planned Maintenance Outage. | ||
The NRC Senior Resident Inspector has been notified. | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181029en.html#en53698 | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181029en.html#en53698 | ||
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Latest revision as of 01:00, 24 February 2020
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(iv)(B), RPS Actuation | |
| Time - Person (Reporting Time:+3.95 h0.165 days <br />0.0235 weeks <br />0.00541 months <br />) | |
| Opened: | David Livingston 08:57 Oct 28, 2018 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Oct 28, 2018 |
| 53698 - NRC Website
| |