DEVELOPMENT OF HIGH VOLUME REDUCTION AND CEMENTSOLIDIFICATION TECHNIQUE FOR PWR CONCENTRATED WASTE

摘要

The hyper-Cement solidification technique was developed, which reduced the volume ofconcentrated liquid wastes from PWR plant by means of stable cement solidification. Dryingthe liquid wastes into powder using a wiped film evaporator and then solidifying the largeamount of powdered wastes attained high volume reduction of the wastes due to the specialcement paste with low viscosity. Using this technique, The volume reduction ratio of the wastesof was larger than in the case of using bitumen technique, which is conventionally employed tosolidify the concentrated liquid wastes in PWR plant. This paper presents the outline of thehyper-cement technique and discusses the mechanical and chemical properties of the cementsolidification.