ENS 46267

v t e ENS Event
22:30 Sep 21, 2010
Title	Agreement State Report - Damaged Fixed Gauge
Event Description	The State of Iowa was notified by Louisa Generating Station, a coal-fired electrical generating plant, that a fixed gauge source had been damaged. The facility has two 50 mCi Cs-137 sources attached to coal crushers. The gauges are used as low level alarm detection devices and detect whether or not coal is in the hopper at any given time. At approximately 5:30 p.m. on 9.21.10 there was a machine failure. [The licensee] suspects that as a result of the failure there was vibrational damage to one of the gauges (manufactured by Texas Nuclear, housing model 5192, serial number B2724). The gauge was visibly damaged but has not resulted in elevated rad levels. No employees were exposed as a result of this event. The gauges are mounted 15 ft from the floor in a building that is not occupied by staff. The machine (coal crusher) remains out of service since the time of failure on 9.21.10. Again, [the licensee] reports no source damage. Their calibrated instrument reads 0.5-1.0 mrem 1 ft from the source, 0.2-0.3 mrem at 2 ft and 0.1 mrem at 3 ft from the source. A technician out of Illinois is scheduled to arrive at the facility on Tuesday, September 28th for further testing and possible repair. The gauge is located in a contained building. The shutter is normally open and the suspected vibration damage resulted in being unable to close the shutter.

ENS 46267 +/-
Where
Mid-America Louisa Gen Station Muscatine, Iowa (NRC Region 3)
License number:	0040-1-70-FG
Organization:	Iowa Department Of Public Health
Reporting

Agreement State
Time - Person (Reporting Time:+14.93 h0.622 days <br />0.0889 weeks <br />0.0205 months <br />)
Opened:	Melanie Rasmussen 13:26 Sep 22, 2010
NRC Officer:	Donald Norwood
Last Updated:	Sep 22, 2010
46267 - NRC Website
v • d • e

v t e Emergency Notification System
Mid-America Louisa Gen Station with Agreement State
WEEKMONTHYEAR2010-09-21T22:30:00 [Table view]
[ENS list for Mid-America Louisa Gen Station]

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