2. テストセル系の開発(<小特集>国際核融合材料照射施設(IFMIF)の設計と開発の現状)

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Of several components of IFMIF, performance of the test assembly is crucially important for obtaining reliable irradiation data set of the candidate fusion materials. In the first section, conditions required for that and relating R&D subjects are summarized and explained, the key issue being controlling the irradiation temperature. Following that, two main concepts that are now being examined in different sectors as test specimen's containing method are illustrated, one being vertical configuration and the other horizontal one. Small specimen test technique (SSTT) for IFMIF is essential to understand the effects of fusion neutron irradiation on materials and to evaluate materials performance under fusion environment. SSTT to measure the fracture toughness of reduced activation ferritic steel was applied for compact tension (CT) and 3 point bend (3PB) test method. The fracture toughness evaluated with 1/4CT specimens was smaller by 20% than that with standard specimens. Master curves were available with 1/2CT specimens but not easy with 1/4CT specimens. Accuracy of the data obtained with 3PB specimens (5 mm × 3 mm × 25 mm) was good. Each method can be used for each adequate purpose of nhe evaluation test of blanket structural materials. Prudential irradiation matrix should be prepared to design the target cell to provide effective irradiation data for DEMO blanket design. The status and recent progress are described on the neutron emission spectrum of neutron production reactions in IFMIF and the activation of accelerator components in IFMIF. The former is of prime importance for the design of the test cell and the post-irradiation analysis, and the latter is also indispensable for maintenance of the IFMIF target.
社団法人プラズマ・核融合学会の論文
2006-01-25

2. テストセル系の開発(<小特集>国際核融合材料照射施設(IFMIF)の設計と開発の現状)

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