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高速炉燃料集合体内詳細熱流動解析手法の開発,8; 燃料変形-熱流動連成手法の開発

Development of a numerical simulation system for detailed thermal hydraulics in a fast reactor fuel assembly, 8; Coupling method of thermal-hydraulics with fuel deformation

大島 宏之; 上羽 智之 ; 橋本 昭彦*; 今井 康友*

Ohshima, Hiroyuki; Uwaba, Tomoyuki; Hashimoto, Akihiko*; Imai, Yasutomo*

JAEAでは、ナトリウム冷却高速炉燃料集合体熱流動挙動を評価することを目的として、燃料の変形を含むさまざまな条件下での解析を可能とする数値解析システムを構築している。本件はその構築の一環として、燃料の変形と熱流動を連成した解析手法を構築するとともに、適用解析を実施しその妥当性を確認したものである。

A numerical simulation system is being developed in order to offer methodologies to clarify thermal-hydraulic phenomena in fuel subassemblies of sodium-cooled fast reactors under various operating conditions such as normal operation, transient condition or deformed geometry condition from the viewpoint of the assessment of fuel pin structure integrity. As a part of this simulation system development, a coupling method of thermal-hydraulic analysis with fuel deformation analysis was implemented and was applied to a high burn-up fuel assembly analysis for the method verification.

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