量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Water cooled ceramic breeder (WCCB) blanket has been considered as the primary design in Japan. There are many thin cooling pipes in the blanket and internal pressure would be applied to the blanket by the pipe rupture. A number of efforts have been made for keeping pressure resistance of the blanket with box structure. Pressure resistance of the box structure could be reinforced with internal ribs or fillets but tritium breeding ratio (TBR) would decrease due to an increase of structure material inside the blanket. Cylindrical structure is well known for more effective than the box structure from the viewpoint of pressure resistance. This study aimed to clarify tritium capability of the blanket different container designs. Box structure, two cylindrical structures with poloidal or radial axis were considered in this study. The dimensions of the blanket were referred to WCCB test blanket module (TBM) in ITER project. TBR of different blanket designs were evaluated by using Monte-Carlo code MCNP5.14 and nuclear data library for fusion neutronics applications, FENDL-2.1. A ratio of breeder and multiplier, gap size around the blanket were regarded as parameters. The tritium breeding capabilities of the blanket designs were analyzed from the perspective of the neutron economy considering neutron escape, captures in iron, and neutron multiplication. Based on the results, the relation between TBR and the neutron economy in different TBM designs was clarified. Finally, blanket designs that could improve tritium breeding capability were proposed.
会議概要（会議名, 開催地, 会期, 主催者等）
The 30th Symposium on Fusion Technology (SOFT 2018)
Tritium breeding capability of water cooled ceramics breeder blanket with different container designs
