ENS 53700: 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 = Seismic Monitoring Panel System Inoperable | ||
| event text = | | event text = This event is being reported pursuant to 10 CFR 50.72(b)(3)(xiii) for a major loss of emergency assessment capability at the Prairie Island Nuclear Generating Plant. | ||
At 1435 CDT on October 28, 2018, troubleshooting of the Seismic Monitoring Panel resulting from the receipt of Control Room annunciator 47023-0603 (Seismic Monitor Panel) determined that the '[Operational Basis Earthquake] OBE Exceedance' alarm on the Seismic Monitoring Panel will not alarm and determined the panel is non-functional. | |||
The Seismic Monitoring Panel system functions to provide indication that the OBE threshold has been exceeded following a seismic event and is used in the Prairie Island Nuclear Generating Plant Emergency Plan to perform classification of Initiating Condition 'Seismic event greater than OBE levels' and Emergency Action Level HU2.1. | |||
Station personnel are monitoring the seismic recorders for event alarms on a 15 minute frequency due to alarm function failure. The station is developing repair plans for restoration of the alarm function. | |||
This event does not adversely affect the safe operation of the plant or health and safety of the public. | |||
The licensee has notified the NRC Resident Inspector. | |||
| URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181029en.html#en53700 | | URL = https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20181029en.html#en53700 | ||
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Latest revision as of 00:00, 24 February 2020
| Where | |
|---|---|
Prairie Island  Minnesota (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+16.73 h0.697 days <br />0.0996 weeks <br />0.0229 months <br />) | |
| Opened: | Jeff Human 21:44 Oct 28, 2018 |
| NRC Officer: | Vince Klco |
| Last Updated: | Oct 28, 2018 |
| 53700 - NRC Website
| |