An Energy Department investigation determined that a design flaw in the ventilation system of a salt mine chamber leaked radiation to the surface, exposing 21 people to radioactive particles. No one ... more 
An Energy Department investigation determined that a design flaw in the ventilation system of a salt mine chamber leaked radiation to the surface, exposing 21 people to radioactive particles. No one became ill, but the report said there was a "degradation of key safety management programs and safety culture" at the facility. Anna Werner reports. less 
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Thu, Apr 24, 2014 8:01 PM EDT