TREATMENT AND GEOLOGICAL DISPOSAL OF WASTE FROM NET PRE-DESIGN

Within the European Fusion Technology programs Studsvik RadWaste AB ha s performed studies on fusion waste treatment and disposal for several years. This paper deals with the treatment and geological disposal of radioactive waste from NET operation and decommissioning. Results fro m calculations on radioactive waste fluxes for the operation and decom missioning of NET are reported. The calculations are based on the NET predesign report published 1993 and include results for the exchangeab le in-vessel and external parts of the machine as well as permanent re actor components. Different aspects of treatment, packaging, transport ation, and interim storage of the waste are discussed. The volumes of waste conditioned for final disposal are preliminarily quantified, acc ording to German and Swedish scenarios for radioactive waste disposal. A total repository volume of approximately 45,000 m3 is required in t he German Scenario and 35,000 m3 is required in the Swedish Scenario. Results from dose rate calculations for NET waste in final repositorie s are presented for the Swedish Scenario. This work was financially su pported by the Swedish Natural Science Research Council (NFR) and the European Atomic Energy Community, under an association contract betwee n Euratom and Sweden.