2010 Fiscal Year Final Research Report

RESEARCH ON UTILIZATION OF FLYASH FOR BARRIER LAYER/BUFFER MATERIALS FOR RADIOACTIVE WASTE DISPOSAL

Research Project

Project/Area Number	21760679
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Earth system and resources enginnering
Research Institution	Kyushu University
Principal Investigator	SASAOKA Takashi Kyushu University, 大学院・工学研究院, 助教 (20444862)
Project Period (FY)	2009 – 2010
Keywords	資源開発 / 放射性廃棄物処分 / 石炭灰の有効利用
Research Abstract	A flyash-based barrier layer/cover system instead of bentonite-only one is proposed in this research. This paper describes the current system and technology for radioactive waste disposal and then proposes and discusses the applicability of flyash as a content of barrier layer/cover material based on the results of a series of laboratory tests and numerical analysis. The applicability of flyash to the contents of barrier layer/buffer for radioactive wastes was investigated in this research. From the results of a series of laboratory tests, it can be concluded that flyash has a great potential for use in them as the bentonite is substituted (substitution ratio : 30-40%).