ENS 42169
ENS Event | |
|---|---|
22:24 Nov 25, 2005 | |
| Title | Unusual Event Declared Due to Dangerous Levels of Carbon Dioxide Following a Cardox Release |
| Event Description | At 16:09 CST, the Control Room received a fire alarm on the Main Generator and actuation of the fire protection system. The Main Generator is protected by Carbon Dioxide for fire protection purposes. There was no evidence of a fire at the Main Generator. Air sampling of the Cardox Storage Tank Room indicated Carbon Dioxide levels at life threatening levels. An Unusual Event was declared at 1624 CST based on Emergency Action Level Chart P 'External Events and Chemical Spills' for a release of toxic or flammable gas on site AND portable monitors indicate toxic or explosive concentrations at life threatening levels of the gas near the spill area.
There were no personnel injuries reported and the licensee is conducting a survey to account for personnel. Ventilation of the affected areas is in progress to reduce the toxic gas levels. The licensee informed state/local agencies and the NRC Resident Inspector.
[The] declaration of Unusual Event has been terminated [at 1915 CST on 11/25/05]. The Control Room received a fire alarm on the Main Generator and actuation of the fire protection system. The Main Generator is protected by Carbon Dioxide for fire protection purposes. There was no evidence of a fire at the Main Generator. [The] source of Carbon Dioxide gas has been isolated. The area with [the] life threatening concentration of Carbon Dioxide has been ventilated. [The] plant no longer has any areas with [a] toxic concentration of Carbon Dioxide at the life threatening levels. Normal plant operation continues. The licensee is continuing their investigation into the cause of the Cardox discharge. The licensee informed stat/local agencies and the NRC Resident Inspector. Notified R3DO(Skokowski), NRR (Gillespie), IRD (Leach), DHS (Akers) and FEMA (Ligett). |
| Where | |
|---|---|
Kewaunee  Wisconsin (NRC Region 3) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-4.23 h-0.176 days <br />-0.0252 weeks <br />-0.00579 months <br />) | |
| Opened: | Ethan Treptow 18:10 Nov 25, 2005 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Nov 25, 2005 |
| 42169 - NRC Website
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WEEKMONTHYEARENS 425302006-04-27T01:49:00027 April 2006 01:49:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Failure of Rps Signal to Initiate Reactor Trip ENS 421692005-11-25T22:24:00025 November 2005 22:24:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Dangerous Levels of Carbon Dioxide Following a Cardox Release ENS 404892004-01-30T17:30:00030 January 2004 17:30:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event 2006-04-27T01:49:00 | |