PHYSICAL AND CHEMICAL PROPERTIES OF MELTED PRODUCT FROM THE INDUCTION HEATING MELTING SYSTEM

摘要

Japanese regulations for the treatment of the non combustible radioactive solid waste generated in nuclear power stations have been under discussion, and it is expected to be published before the year 2000. One of the promising treatment method for the non combustible radioactive solid waste is a melting process. Using a melting process, we could expect the uniformity of the product for a density, for an elemental distribution, and also we could expect the enough mechanical strength, and so on. Based on these properties, melting process could simplify the act of the waste form quality confirmation. In addition, the melted product have its own radionuclide confinement function, as is expressed as the low leachability. Also aluminum wastes that could generate the hydrogen gas in high pH water solution condition, such as in the pre-solidified cement mortar or in the water filled cement environment, can be melted with iron based metals and be produced ferroalloy of aluminum that shows lower generation rate of hydrogen gases than the raw aluminum waste. We have confirmed that the melting process could apply to the treatment of the non combustible radioactive waste, and the melted product is suitable for the second stage burial project of low level radioactive waste in Japan.