Athens, AL – Some TVA workers were exposed to low levels of radiation at the Browns Ferry nuclear plant in north Alabama. TVA officials say six workers inhaled small amounts of radiation Wednesday when an air filtering machine failed to operate properly at Unit One. They'll be monitored for several days, along with their shoes and clothes and those of 86 other workers, which were also contaminated. TVA confirms that any radiation releases were within the plant's normal operating limits. Unit One has been shut down since 1985 because of safety concerns. TVA's working to get the unit back on line by 2007. That's costing about one-point-eight billion dollars. The Tennessee Valley Authority is the nation's largest public utility, providing electricity to customers in seven states.