ON-SITE EMERGENCY POWER SOURCE IN NUCLEAR POWER PLANT AND INTERLOCK SWITCH BUS CONNECTION CIRCUIT FOR MAINTENANCE

摘要

PROBLEM TO BE SOLVED: To make it possible to easily carry out inspection on an emergency bus electrically independently in emergency power source for a nuclear power plant. SOLUTION: In emergency power source in a nuclear power plant which is equipped with an emergency bus 10a in a section I and an emergency bus 10b in a section II and where the line between both emergency buses 10a and 10b is electrically separated during the operation of the nuclear power plant, bus connection circuits 14, 12a and 126 are provided to connect the line between both emergency buses 10a and 10b only when one emergency bus 10a is inspected during the shutdown of the nuclear power plant and supply electricity from the other emergency bus 10b to the emergency bus 10a being inspected.