ENS 40889: Difference between revisions
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| event date = 07/21/2004 11:55 CDT | | event date = 07/21/2004 11:55 CDT | ||
| last update date = 07/29/2004 | | last update date = 07/29/2004 | ||
| title = Eof Declared Inoperable Due | | title = Eof Declared Inoperable Due to Unacceptable Air Flow Rates in Filtration Mode | ||
| event text = At 1155, 7/21/04, Callaway Plant declared the Emergency Offsite Facility (EOF) inoperable due to unacceptable air flow rates when the ventilation system was in the Filtration mode. Normally the ventilation system is designed to operate with a positive pressure in the EOF in order to prevent in-leakage of unfiltered air. During regularly scheduled maintenance, it was discovered that if a fume hood exhaust fan was operated with the EOF ventilation in the Filtration mode, it was possible to develop a negative pressure condition within the EOF. A station Work Request has been generated and ventilation equipment has been aligned so that a positive pressure can be maintained until the problem has been corrected. | | event text = At 1155, 7/21/04, Callaway Plant declared the Emergency Offsite Facility (EOF) inoperable due to unacceptable air flow rates when the ventilation system was in the Filtration mode. Normally the ventilation system is designed to operate with a positive pressure in the EOF in order to prevent in-leakage of unfiltered air. During regularly scheduled maintenance, it was discovered that if a fume hood exhaust fan was operated with the EOF ventilation in the Filtration mode, it was possible to develop a negative pressure condition within the EOF. A station Work Request has been generated and ventilation equipment has been aligned so that a positive pressure can be maintained until the problem has been corrected. | ||
The licensee noted that regularly scheduled maintenance is performed on a yearly frequency. The licensee informed the NRC Resident Inspector. | The licensee noted that regularly scheduled maintenance is performed on a yearly frequency. The licensee informed the NRC Resident Inspector. | ||
Latest revision as of 21:23, 1 March 2018
| Where | |
|---|---|
Callaway  Missouri (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+2.62 h0.109 days <br />0.0156 weeks <br />0.00359 months <br />) | |
| Opened: | Jim Milligan 19:32 Jul 21, 2004 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jul 29, 2004 |
| 40889 - NRC Website
| |