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JSFR実用炉の概念設計,4; 原子炉構造

Conceptual design toward the commercial reactor of JSFR, 4; Reactor system

衛藤 将生*; 神島 吉郎*; 岡村 茂樹*; 根岸 和生*; 阪本 善彦; 川崎 信史

Eto, Masao*; Kamishima, Yoshio*; Okamura, Shigeki*; Negishi, Kazuo*; Sakamoto, Yoshihiko; Kawasaki, Nobuchika

JSFRの原子炉構造では、設備合理化等を狙って、切込みUIS+単回転プラグ式燃料交換方式及びホットベッセル方式を取り入れコンパクト化した原子炉構造を検討している。本構造概念に関して流動適正化検討,耐震性検討,耐熱性検討等により成立性見通しを確認し、技術の採否評価結果について報告する。

A concept of a compact reactor system for Japan Sodium-cooled Fast Reactor (JSFR) is being studied with aims including streamlining its facilities. A candidate of innovative technology for this purpose is a fuel exchange system which consists of an upper internal structure (UIS) with a radial slit and a single rotating plug, and another candidate is a "ot vessel" concept. The applicability of this structural concept has been studied by considering flow optimization, seismic resistance, thermal evaluation, etc. This paper reports the result of the applicability study.

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