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Analysis and experimental results on ingress of coolant event in vacuum vessel

Ryoichi Kurihara, Toshio Ajima, Tomoaki Kunugi, Kazuyuki Takase, Fumio Kasahara1998年Fusion Engineering and DesignIF 1.7出版社

AbstractExperiments on the ingress of coolant event (ICE) in the vacuum vessel of a fusion reactor have been carried out in the Japan Atomic Energy Research Institute (JAERI) as one of the research and development tasks for the International Thermonuclear Experimental Reactor (ITER) to obtain the thermofluid data for validation of safety analysis codes. The ICE experiment is numerically analyzed using the transient reactor analysis code (TRAC) which is one of the codes preparing for the safety analysis of the ITER. The TRAC has been modified so as to analyze the ICE phenomena in the vacuum vessel of a fusion reactor. Several ICE experiments have been carried out as benchmark tests for the safety analysis codes. We have analyzed those experiments by using the TRAC, and considered the difference between the analysis and experimental results. Analysis results of the temperature in the vacuum vessel show a tendency completely different from the experimental result. It is clarified that the present TRAC has not been verified on the scattering behavior of water droplets.

日本語訳

日本原子力研究所(JAERI)において、核融合炉の真空容器内冷却材流入事象(ICE)に関する実験が、国際熱核融合実験炉(ITER)の安全解析コード検証用の熱流動データ取得を目的とした研究開発課題の一つとして実施されてきた。ICE実験は、ITERの安全解析に向けて整備されている過渡解析コードの一つであるTRACを用いて数値解析されている。TRACは、核融合炉真空容器内のICE現象を解析できるよう改良が施されてきた。複数のICE実験が安全解析コードのベンチマーク試験として実施されてきた。我々は、これらの実験をTRACを用いて解析し、解析結果と実験結果の差異について検討を行った。真空容器内温度の解析結果は、実験結果とは全く異なる傾向を示した。現行のTRACは、水滴の飛散挙動に関して検証が不十分であることが明らかとなった。

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