Guideline for immobilization, packaging and storage of low- and intermediate-level radioactive wastes

Waste acceptance criteria for disposal have not yet been established in Switzerland. A guideline for immobilization, packaging and storage of low- and intermediate-level radioactive wastes from nuclear power plants in Switzerland became effective in 1980. This guideline is a basic document for the Swiss Nuclear Safety Department for licensing purposes and has the following aims: to define essential requirements; to specify quantitative limits; to provide some guarantee for acceptance of waste for disposal. This paper deals with different requirements mentioned in the guideline either qualitatively or quantitatively. One of the important values is the maximum leach rate of 10-2 kg.m-2.d-1 measured over a period of 150 days. The test method is in conformity with the prescription laid down in a draft version by the International Organization for Standardization. Another main requirement is the stability of the submerged waste form against swelling and cracking. Wastes from reprocessing of spent fuel are not covered by this guideline. (author)