Electricite de France says 15 workers were exposed to radioactive contamination while carrying out maintenance at a nuclear plant in the French Alps. The electricity giant said "traces of radioactive elements" were found during standard monitoring of workers at the Saint-Alban plant in the Isere region. EDF added that doctors examined the workers after the contamination was found and ruled that it had "no consequences" for their health. The utility is searching for the cause of the contamination. The incident occurred Friday, and EDF announced it Monday.