ITERテストブランケットのための核特性研究の進展

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Neutronics experiments have been performed using a DT neutron source for development of an ITER test blanket. Experimental and numerical calculation studies have been performed on a multi-layered blanket mockup and pebble packing layer to evaluate mainly tritium production rates. C/Es (ratio of calculation result to experimental result) were range of 0.94-1.04 on integrated tritium productions from the results in the multi-layered blanket mockup experiment, and it was found that integrated tritium productions could be accurately evaluated using the latest Monte Carlo calculation code and nuclear data libraries. as evaluation for the pebble packing layer, a numerical calculation method was proposed using a hexagonal close-packed heterogeneous geometry. From the results in the Li_2O pebble packing layer mockup experiment, C/Es were 0.99 on integrated tritium productions using the proposed heterogeneous geometry. The calculation accuracy could be improved by applying the proposed method. From comparisons between the Monte Carlo calculation results by homogeneous and heterogeneous geometries, tritium production rates by homogeneous geometries were clearly reduced compared with those by heterogeneous geometries. With increasing ^6Li enrichment the results by homogeneous geometries still much decrease. Impacts of these reductions on test blanket designs are very large, and it can be concluded that evaluations are required on a tritium breeding ratio by the Monte Carlo calculation using heterogeneous geometries.
社団法人プラズマ・核融合学会の論文
2006-05-25

ITERテストブランケットのための核特性研究の進展

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