ENS 49943: Difference between revisions
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| event date = 03/21/2014 13:00 CDT | | event date = 03/21/2014 13:00 CDT | ||
| last update date = 03/21/2014 | | last update date = 03/21/2014 | ||
| title = Shield Building Vent Gas Rad Monitors Out | | title = Shield Building Vent Gas Rad Monitors Out of Service for Planned Maintenance | ||
| event text = At 1330 CDT on March 21, 2014, 1R-22 and 2R-22, Shield Building Vent Gas Radiation Monitors will be removed from service for planned preventative maintenance and therefore [will be] nonfunctional. These monitors have no compensatory measure that will allow timely classification of two Emergency Action Levels (EALs); NUE (Notification of Unusual Event) and Alert classifications when out of service. They are also used for offsite dose projection calculations. This will result in a Loss of Emergency Assessment Capability while 1R-22 and 2R-22 are out of service. This is a reportable condition in accordance with 10 CFR 50.72(b)(3)(xiii). | | event text = At 1330 CDT on March 21, 2014, 1R-22 and 2R-22, Shield Building Vent Gas Radiation Monitors will be removed from service for planned preventative maintenance and therefore [will be] nonfunctional. These monitors have no compensatory measure that will allow timely classification of two Emergency Action Levels (EALs); NUE (Notification of Unusual Event) and Alert classifications when out of service. They are also used for offsite dose projection calculations. This will result in a Loss of Emergency Assessment Capability while 1R-22 and 2R-22 are out of service. This is a reportable condition in accordance with 10 CFR 50.72(b)(3)(xiii). | ||
Unit 1 and Unit 2 Shield Building Ventilation Stacks are also monitored by high range monitors, 1R-50 and 2R-50, which are used for the same purpose in Site Area or General Emergency classifications. 1R-50 and 2R-50 are being monitored and are indicating normal values. There are no radioactive leaks that will impact the Shield Buildings as evidenced by normal readings on 1(2)R-22 prior to their removal from service. Preventative maintenance (belt inspections) is expected to last approximately 1 hour. Maintenance will not result in the unplanned release of radioactivity to the environment and will not adversely affect the safe operation of the plant or health and safety of the public. | Unit 1 and Unit 2 Shield Building Ventilation Stacks are also monitored by high range monitors, 1R-50 and 2R-50, which are used for the same purpose in Site Area or General Emergency classifications. 1R-50 and 2R-50 are being monitored and are indicating normal values. There are no radioactive leaks that will impact the Shield Buildings as evidenced by normal readings on 1(2)R-22 prior to their removal from service. Preventative maintenance (belt inspections) is expected to last approximately 1 hour. Maintenance will not result in the unplanned release of radioactivity to the environment and will not adversely affect the safe operation of the plant or health and safety of the public. | ||
Latest revision as of 21:51, 1 March 2018
| Where | |
|---|---|
Prairie Island  Minnesota (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.67 h-0.153 days <br />-0.0218 weeks <br />-0.00503 months <br />) | |
| Opened: | Steve Ingalls 14:20 Mar 21, 2014 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Mar 21, 2014 |
| 49943 - NRC Website
| |