Corrosion is seen in a ventilation duct at the No. 3 unit of the Kashiwazaki-Kariwa nuclear power plant in Niigata Prefecture. | NUCLEAR REGULATION AUTHORITY   Corrosion and holes have been found in ventilation ducts at 12 reactors at seven nuclear plants across the country, the Nuclear Regulation Authority said Wednesday, raising concerns that workers … Continue reading Air duct corrosion and holes found at seven nuclear plants