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Safety activities in JAERI related to ITER

S. O'hira, E. Tada, K. Hada, Y. Neyatani, T. Tsunematsu2001年Fusion Engineering and DesignIF 1.7出版社

AbstractSafety design approach, design codes and safety-related technology development for construction of the international thermonuclear experimental reactor (ITER) initiated in Japan Atomic Energy Research Institute (JAERI) has been reviewed. Safety design approach and implementation are focused on inherent and high-level passive safety features of the ITER-FEAT. By such features, escalation of abnormal condition to accident can be prevented without any special countermeasures such as emergency plasma shutdown system. As a result, the primary containment system and the secondary confinement one are proposed to achieve the ITER safety objectives. To establish the structural design codes for unique ITER components, an ad-hoc technical committee has been organized. The designs of the vacuum vessel and tritium process components have been reviewed and discussed. Recommendations including some attractive methodologies for structural design and components examinations, taking into account a low level of hazard potential and unique safety features of ITER was given by the committee. Another ad-hoc technical committee under JAERI Construction Division is discussing the design codes for ITER seismic isolation. The current status of R&D activities ongoing in JAERI for accumulation of experimental data required for assurance of the safety analysis and design codes for ITER are also reviewed.

日本語訳

Abstract安全設計アプローチ、設計コード、および日本原子力研究所(JAERI)で開始された国際熱核融合実験炉(ITER)建設のための安全関連技術開発について概説した。安全設計アプローチとその実施は、ITER-FEATの固有かつ高度な受動的安全特性に焦点を当てている。これらの特性により、緊急プラズマ停止システムなどの特別な対策を講じることなく、異常状態から事故への拡大を防止することができる。その結果、一次格納系と二次閉じ込め系がITERの安全目標を達成するために提案されている。ITER特有の構成機器に対する構造設計コードを確立するため、特別技術委員会が組織された。真空容器およびトリチウムプロセス機器の設計が審査・検討された。委員会は、ITERの低い危険性ポテンシャルと特有の安全特性を考慮し、構造設計および機器検査に関する魅力的な方法論を含む勧告を行った。JAERI建設部門の下にある別の特別技術委員会は、ITER免震の設計コードについて検討している。ITERの安全解析および設計コードの保証に必要な実験データの蓄積のためにJAERIで進行中の研究開発活動の現状についても概説した。

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