ENS 48542
ENS Event | |
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15:19 Nov 28, 2012 | |
Title | Notification of Unusual Event Due to Toxic Gas in Radwaste Control Room |
Event Description | Entered an Unusual Event [under Emergency Action Level] MU1, toxic gas, carbon monoxide (CO), detected in the Radwaste Control Room. Levels rose to 34 ppm and the Radwaste Control Room was evacuated prior to reaching the First Energy exposure limit of 35 ppm. The source of the CO has not been determined. There is no radiation release from this event.
There were no personnel injuries and offsite assistance was not requested. There was no effect on plant operations. The licensee has notified state and local authorities and the NRC Resident Inspector. Notified DHS SWO, FEMA, DHS NICC and NuclearSSA via email.
[At 1452 EST, the licensee] terminated the Unusual Event for MU1, due to toxic gas - carbon monoxide, detected in the Radwaste Control Room. The source of the carbon monoxide readings was determined to be from a leaking acetylene bottle. The acetylene bottle has been removed from the building. Carbon monoxide readings have returned to normal. The licensee noted that the acetylene is detected as carbon monoxide by the toxic gas monitoring devices. The licensee has notified State and local authorities and the NRC Resident Inspector. Notified R3DO (Stone), NRR (EO) Lubinski) , IRD (Marshall), DHS SWO, FEMA, DHS NICC and NuclearSSA via email. |
Where | |
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Perry Ohio (NRC Region 3) | |
Reporting | |
Emergency class: | Unusual Event |
10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
Time - Person (Reporting Time:+-4.48 h-0.187 days <br />-0.0267 weeks <br />-0.00614 months <br />) | |
Opened: | Rich Prouty 10:50 Nov 28, 2012 |
NRC Officer: | Howie Crouch |
Last Updated: | Nov 28, 2012 |
48542 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 499872014-04-02T18:01:0002 April 2014 18:01:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Toxic Gas Release ENS 485422012-11-28T15:19:00028 November 2012 15:19:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Due to Toxic Gas in Radwaste Control Room ENS 426562006-06-20T20:30:00020 June 2006 20:30:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to a Seismic Event ENS 423302006-02-11T20:15:00011 February 2006 20:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared Due to a Fire in a Ventilation Fan ENS 411952004-11-12T20:00:00012 November 2004 20:00:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event ENS 411732004-11-04T15:54:0004 November 2004 15:54:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to a Toxic Gas Release Affecting Normal Operations ENS 408822004-07-20T07:44:00020 July 2004 07:44:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declared Due to High Offgas Effluent Alarm Pegged High and Unable to Confirm within 15 Minutes ENS 400632003-08-14T20:10:00014 August 2003 20:10:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Loss of Offsite Power Greater than 15 Minutes. 2014-04-02T18:01:00 | |