HTGR Fuel Cycle

概要

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High Temperature Gas Cooled Reactor (HTGR) fueled with fully enriched uranium and thorium, is expected to show a better fuel performance and will reduce the consumption of uranium resources to a large extent. The best use of thorium and bred fuel, uranium-233, can be achieved by the coated particle fuel, as the contamination of recovered U-233 with U-236 and U-238 is limited to a low level while uranium particles and thorium particles are homogneously mixed in a fuel rod.<BR>The unique feature of HTGR fuel structure requires to innovate spent fuel reprocessing techniques. In particular, completely different head and process from that for light water reactor fuels has to be developed. Crush-burn-leach and off gas treatment techuiques are beingdeveloped in U. S. A. under a government sponsored program. Tritium and noble gases can be removed efficiently through the techniques. From the environmental safety stand point, it is an important advantage for the HTGR fuel reprocessing.
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