ENS 54073: Difference between revisions
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| event date = 05/19/2019 18:09 CDT | | event date = 05/19/2019 18:09 CDT | ||
| last update date = 05/20/2019 | | last update date = 05/20/2019 | ||
| title = Loss of the Safety Parameter Display System Due to | | title = Loss of the Safety Parameter Display System Due to Inverter Failure | ||
| event text = On May 19, 2019, at 1809 | | event text = On May 19, 2019, at 1809 CDT, the Safety Parameter Display System (SPDS) was lost to both Arkansas Nuclear One Units 1 and 2 due to the SPDS Inverter (2Y-26) failure. The SPDS Inverter is the power supply to both units' SPDS. The Unit 2 Control Room dispatched operators in response to a smoke alarm received from the 2Y-26 Inverter room. Upon arrival, smoke was reported emanating from 2Y-26. There was no report of fire at any time. Field operators de-energized 2Y-26 and the smoke ceased. The loss of SPDS also caused the Power Operating Limits (POL) function of the Unit 2 Core Operating Limits Supervisory System (COLSS) to be lost, so Unit 2 reduced power to 91 [percent] in accordance with Technical Specifications. Both units are at power and stable. | ||
The NRC Resident has been notified. | The NRC Resident has been notified. | ||
This is reportable per | This is reportable per 10 CFR 50.72(b)(3)(xiii). | ||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/ | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/20190521en.html#en54073 | ||
}}{{unit info | }}{{unit info | ||
| Unit = 1 | | Unit = 1 | ||
Latest revision as of 23:49, 23 February 2020
| Where | |
|---|---|
Arkansas Nuclear  Arkansas (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+0.88 h0.0367 days <br />0.00524 weeks <br />0.00121 months <br />) | |
| Opened: | Kevin Parks 00:02 May 20, 2019 |
| NRC Officer: | Jeff Herrera |
| Last Updated: | May 20, 2019 |
| 54073 - NRC Website
| |