METHOD AND DEVICE FOR TREATING STICKING SODIUM OF FAST BLEEDER REACTOR CONSTITUENT ELEMENT

摘要

PURPOSE:To prevent sodium from reacting violently by making residual sticking sodium inert while cooling a reactor core constituent element where the sodium sticks and remains with argon gas containing carbon dioxide. CONSTITUTION:The flexible pipe 30 of a connecting device 24 is extended by a cylinder to connect a pressure flange 29 for connection to the door valve 18 of the fuel holding pipe 19 of a spent-fuel carriage 13 positioned on an argon gas side 7 prior to the treatment of sticking sodium. Then the door valve 18 is closed and the valve 32a of a discharge system 32 is opened to discharge the gas in the holding pipe 19, thereby supplying and charging the argon gas in the holding pipe 19 and a gas flow pipe 20 from an argon gas supply system 33. Then carbon dioxide is injected into the holding pipe 19 from a carbon dioxide gas supply system 34 and then the door valve 18 and connecting device 24 are disconnected from each other. Then the valve 23 of the flow pipe 20 is opened and a gas cooler 21 and a blower 22 are put in operation to circulate the argon gas containing carbon dioxide in the holding pipe 19 and flow tube 20, thereby making the sodium which sticks and remains on the fuel F inert while cooling the spent fuel F.