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Study on safety design concept for future sodium-cooled fast reactors in Japan

日本における将来のナトリウム冷却高速炉の安全設計概念に関する研究

久保 重信; 島川 佳朗*

Kubo, Shigenobu; Shimakawa, Yoshio*

第4世代国際フォーラムで開発された安全設計クライテリア及び安全設計ガイドラインに基づいた日本における将来のナトリウム冷却高速炉の安全設計概念に関する研究について記述した。ナトリウム冷却高速炉の特徴に応じ、固有安全または受動安全を取り入れた設計概念を構築した。東京電力福島第一原子力発電所の事故の教訓を踏まえた設計対策を取り入れている。既存の設計・製作に関する技術とFaCTで開発を進めた革新技術が、この安全設計概念の実現のための鍵である。

This paper describes safety design concept for future sodium-cooled fast reactors (SFRs) in Japan, which is based on the safety design criteria and safety design guidelines developed in the auspices of the international forum of generation IV nuclear energy systems. Inherent and/or passive design features are utilized based on SFRs characteristics such as low pressure, high thermal inertia of the system. Lessons learned from the Fukushima Dai-ichi accident is one of important issues to be incorporated into the safety design concept. In order to realize commercial SFRs in the future, robust and rational safety design should be pursued by integrating various factors into the design and limiting additional specific systems, structures and components. Existing engineering principle for the design and manufacturing of SFR's components, and innovative technologies introduced in the FaCT project are keys to achieve the safety concept.

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