Advanced Liquid Waste Treatment System Using a High Efficiency Solidification Technique.

Kikuchi, M. ; Hirayama, S.

Technical Information Center Oak Ridge Tennessee

关键词: Radioactive waste processing;    Liquid wastes;    Solidification;    Radioactive wastes;    Bitumens;   

RP-ID  :  DE2005825713

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

An advanced system using High Efficiency Solidification Technology (HEST) was developed to treat PWR liquid waste and the first unit is operating in Taiwan (1) and a detailed design is being carried out for the second unit in Japan. The HEST system consists of two subsystems, a super-concentration subsystem and a solidification subsystem. The super-concentration subsystem is able to concentrate the waste solution to a total boron content as high as 130,000 ppm prior to solidification. The higher boron content will result in greater volume reduction efficiency of solidification. The solidification subsystem consists of an in-drum mixing and a conveyor units. Representative features of this advanced system are as follows: (1) Simple system: The system consists of the super-concentration and cement solidification subsystems; it is as simple as the conventional cement solidification system. (2) High volume reduction efficiency: The number of solidified waste drums is about 1/2.5 that of bitumen solidification. (3) Stable Package: Essentially no organic material is used, and the final package will be stable under the final disposal conditions. (4) Zero secondary waste: Washing water used in the in-drum mixer is recycled. This paper describes the outline of HEST technology, treatment system and pilot plant tests.