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Na側-水側連成解析による直管型蒸気発生器3次元評価手法の整備

Development of 3D evaluation method for straight tube steam generator by coupled sodium side and water side simulation

吉川 龍志  ; 今井 康友*

Yoshikawa, Ryuji; Imai, Yasutomo*

高速炉直管型蒸気発生器ナトリウム側多次元解析と水側二相流解析を組合せた連成解析システムの構築を進めている。本研究では、Fluentによるポーラスボディ解析モデルを採用したナトリウム側多次元解析モデルを整備し、水側マルチチャンネル解析コードとの連成解析モデルを構築した。ナトリウム側圧力損失相関式の計算、水側との連成処理は、Fluentユーザ定義関数(UDF)機能で開発した。750MWe級実機設計例における直管型蒸気発生器体系で連成解析を実施した結果、妥当な結果が得られることを確認した。

In Japan Atomic Energy Agency (JAEA), a study of the thermodynamic feasibility of straight tube steam generator for Fast Breeder Reactor has been conducted. A coupled simulation system is being constructed which coupled the three dimensional simulation in sodium side with the multi-channel simulation in water side. The CFD code FLUENT was used to simulate the three dimensional flow in sodium side of SG by porous body model. The information exchange model between the sodium side and water side simulation codes was developed for the coupled simulation. A test simulation on the straight-tube steam generator system was carried out, and the accuracy of the coupled simulation model was confirmed.

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