Confidential information on nuclear power plant inspections was posted on the Internet recently by a virus in the computer of an employee contracted to do the inspections, Mitsubishi Electric Co. said Thursday.
The leak was on data on seven nuclear power plants and 13 thermal and hydroelectric power plants, according to Mitsubishi Electric, which named subsidiary Mitsubishi Electric Plant Engineering Corp. as the contractor in question.
The 20 facilities are run by 12 companies.