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ナトリウム冷却タンク型高速炉のホットプレナム部ガス巻込み評価手法の開発

Development of gas entrainment evaluation method in the hot plenum of sodium-cooled fast reactor

江連 俊樹 ; 松下 健太郎  ; 佐々木 啓介; 田中 正暁 

Ezure, Toshiki; Matsushita, Kentaro; Sasaki, Keisuke; Tanaka, Masaaki

ナトリウム冷却タンク型高速炉の実証炉(以下、実証炉)では、概念設計段階で取り組むべき研究課題の一つとして、炉心上部のホットプレナム部におけるガス巻込みの防止が挙げられている。これに関連して、われわれは、ガス巻込み評価手法(StreamViewer)の開発を進めている。本研究では、実証炉設計でのホットプレナム部ガス巻込み評価へのStreamViewer適用に向けて、評価手法の開発計画をまとめた。さらに、StreamViewerの妥当性確認を目的として実施予定の縮尺水流動試験の検討結果について報告する。

In the design of the pool-type demonstration sodium-cooled fast reactor (demonstration reactor), the prevention of gas entrainment in the hot plenum of the reactor vessel is one of important issues to be addressed in the conceptual design of demonstration reactor. Related to this problem, the authors have been developing an evaluation approach combining the analysis method of entrained gas-transport in the primary circuit, SYRENA, and the gas entrainment evaluation method, StreamViewer, at the free surface in the hot plenum of the demonstration reactor. In this study, a development plan of StreamViewer is presented toward application to the evaluation of the demonstration reactor design. Furthermore, an overview of scaled model water experiment of the pool-type demonstration reactor to obtain the validation date for StreamViewer is also presented.

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