Conclusions from the Cadarache workshop near-field environment and containment

A technical Workshop on modelling near-field performance of HLW repositories was held in Cadarache, France on May 11-13, 1993. Amongst the topics considered by small working groups was definition of the near-field chemical environment and the role of the chemistry in influencing radionuclide containment. As output, the Workshop participants reached a consensus on specific areas of work which: a) Need not be developed further; i.e. are either well enough determined or are know to be unimportant for assessing performance, b) Should be done and offer potential for international collaboration, c) Should be done but are site/concept-specific, d) Might be useful but should not be initiated without further analysis to assess their relevance. This paper outlines the discussions which led to the consensus and lists the processes which were assigned to these different categories. (author)