Abstract
Consideration of the deterioration of rock due to chemical attack from such things as fossil ground water or salts of seawater origin and a change in environment due to air supply is important for high-level nuclear waste disposal. The quantitative evaluation of the chemical attack is important but current experimental methods are too vague. This is especially so for slaking test, where such chemical conditions are not considered and the analysis of the immersion solution that may cause rock deterioration is not prescribed, either. Therefore a new valuation method has been proposed incorporating a laboratory slaking test taking into account of the chemistry of water quality and air supply conditions and simulating chemical conditions for sedimentary rocks.
