Various decontamination method are examined for reducing the generation volume of technological radioactive waste ,dec reasing radiation dose rate for personnel ,and so on during long life operation of Rokkasho Reprocessing Plant. We ha ve been developing so called “Wide LASER decontamination method”which combined with remote controlled robot to realize highly performance of decontamination, small influence to the materials, and less generation of the secondary waste. The authors introduce the characterist...
英字タイトル:
Approach to the decontamination with the wide laser and remote controlled robot in Rokkasho Reprocessing Plant

In order to keep stable and continuous operation of the power plants or chemical plants, an ice plug technology are often introduced to them specially for the room temperature water pipe, because of this effect to reduce volume of drainage and the isolation range. Water in the pipe are frozen from outside with liquid nitrogen as coolant, and this pipe is closed with this frozen water as called “ice plug effect” which generates the adhesive and the frictional force at the inner surface of the pipe. There...
英字タイトル:
Ice plug application technology for the maintenance of chemical reagent pipe system