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高速炉蒸気発生器流動安定性評価手法の開発

Development of evaluation method for flow stability in steam generator of fast breeder reactor

吉川 龍志  ; 大島 宏之

Yoshikawa, Ryuji; Ohshima, Hiroyuki

高速増殖炉実用化研究開発において直管型蒸気発生器流動安定性評価に適用できる解析コードを開発している。開発済みの水側二相流動解析コードにナトリウム及び伝熱管の温度解析機能を追加して、ナトリウム流動と水側流動をカップリングした一本管モデルの解析コードを開発した。70MW直管型蒸気発生器流動安定性試験の解析により、流動不安定現象を解析できることを確認した。

The feasibility assessment of steam generator with straight heat transfer tube is being carried out within the research and development activities for the practical application of Fast Breeder Reactor. So the computer code to analyze flow stability of the steam generator is being developed. A single-channel simulation code which couples the sodium flow with water flow was developed by adding the temperature calculation modules of sodium and heat transfer tube to the water side flow simulation. The flow stability experiments of 70 MW steam generator were simulated, and the capability of computer code on predictions of flow oscillation was confirmed.

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