Applicability of Geopolymers as a Solidification Matrix for Wastes Containing Radioactive Cesium

Abstract

Wastes containing radioactive cesium are being generated both off-site and on-site at the Fukushima Daiichi Nuclear Power Station. One of the major issues is how to treat and stabilize these wastes for safe storage, transportation, and disposal. Recently, geopolymers, which are inorganic materials like cement, has attracted attention as a new solidification material. This paper briefly reviews geopolymers and their applicability as a solidification matrix for radioactive wastes containing cesium, and presents examples of research on the solidification of such wastes conducted by our group.