JOHANNESBURG--November 7, 2012--Written by Richard Finlayson, Senior International Editor for Industrial Info Resources (Sugar Land, Texas)--The use of uncertified parts in two South Korean nuclear facilites has caused the power plants to be shut down for two months for unscheduled maintenance. The parts included fuses, cooling fans and power switches that were not covered by the required nuclear certificates, although the parts could have been used in other industries.