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Experimental research on molten salt thermofluid technology using a high-temperature molten salt loop applied for a fusion reactor Flibe blanket

Saburo Toda, Shinya Chiba, Kazuhisa Yuki, Masahiro Omae, Akio Sagara2002年Fusion Engineering and DesignIF 1.7出版社

AbstractExperimental research on molten salt thermofluid technology using a high-temperature molten salt loop (MSL) is described in this paper. The MSL was designed to be able to use Flibe as a coolant, however, a simulant, heat transfer salt (HTS) has to be used alternatively since Flibe is difficult to operate under avoiding a biohazard of Be. Experiment on heat-transfer enhancement, that is required for applying to cool the high heat flux components of fusion reactors, is ongoing. Preliminary experimental results showed that an internal structure of a mixing chamber in the MSL was important to obtain accurate bulk temperatures under severe thermal conditions. For operating the loop, careful handling are needed to proceed how to melt the salt and to circulate it in starting the operation of the MSL. It is concluded that several improvements proposed from the present experiences should be applied for the future Flibe operation.

日本語訳

本論文では、高温溶融塩ループ(MSL)を用いた溶融塩熱流体技術に関する実験研究について述べる。MSLは冷却材としてフリーベ(Flibe)を使用できるよう設計されたが、ベリリウム(Be)の生物学的危険性を回避する観点からフリーベの運転が困難であるため、代替として熱伝達塩(HTS)が使用された。核融合炉の高熱流束成分を冷却するために要求される熱伝達促進に関する実験が進行中である。予備的な実験結果から、MSLにおける混合チャンバーの内部構造が、厳しい熱条件下で正確なバルク温度を得るために重要であることが示された。ループの運転においては、MSLの起動時に塩を溶融し循環させる方法について慎重な取り扱いが必要である。本実験から得られた知見に基づき、将来のフリーベ運転に向けていくつかの改良が提案されるべきであると結論付けられる。

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