STICKING SODIUM REMOVING METHOD FOR FAST REACTOR CORE INSTRUMENT

摘要

PURPOSE:To stick sodium on inert powder and vaporize it, and to improve removal efficiency by burying the reactor core constituent element where sodium sticks in the inert powder, fluidifying it with inert gas, and holding them at specific temperature and carrying out processing. CONSTITUTION:The reactor core instrument 21 which is already used is embed ded perpendicularly in the inert powder 23 in a container 22. Then the blower 25 of a gas circulation circuit 24 is driven to supply the inert gas from the lower part of the container 22 through a dispersion plate 26 and the powder 23 is fluidified, the inert gas is jetted from a gas nozzle installed at the lower end of the element 21 to hold the inside of the container 22 at 300-600 deg.C. Then the sodium which sticks on the element 21 inert powder particles is vaporized with the internal gas at 300-600 deg.C temperature. The inert gas containing sodium vapor is discharged to a circuit 24, but the inert powder particle in the mixed gas are separated by a cyclone 31. The mixed gas is cooled and the sodium is condensed and separated, and recovered.