著者

佐久間 秀樹

出版者

Japan Society of Engineering Geology

雑誌

応用地質 (ISSN:02867737)

巻号頁・発行日

vol.32, no.6, pp.272-280, 1992-02-10 (Released:2010-02-23)

参考文献数

9

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There is a worldwide scientific consensus that deep geological disposal is the most feasible option for disposing of high-level radioactive waste. In Japan, these wastes are liquids which are generated by the reprocessing of spent nuclear fuel. High-level radioactive waste will be vitrified and stored for cooling prior to the final disposal.The concept of geological disposal uses a system of multiple safety barriers. These barriers include engineered barriers (waste form, overpack and backfill) and natural barriers (low permeability, low hydraulic gradient and geochemical retardation, among others). Together engineered barriers and natural barriers will effectively isolate the waste from contact with humans or the environment.An extensive research and development program on deep geological disposal has been carried out in Japan.This program includes performance assessment studies on the geological disposal system, development of disposal technologies and an overall evaluation of the geological environment in Japan. The objective of current program is to assess the effectiveness of the geological disposal concept without narrowing down to specific geological environment.