Neutron streaming through narrow and long annulus.
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概要
- 論文の詳細を見る
Neutron streaming in a very narrow and long stainless steel annulus which was 3 mm wide and 2, 480 mm long, was measured by TLDs and a neutron dose rate meter at the fast neutron source reactor YAYOI. The attenuation was very strong near the entrance and became very weak beyond 900 mm. The weak attenuation was due to the streaming of neu-trons through the annulus. <BR>The two-dimensional discrete ordinates transport calculation with a forward biased S418 quadrature set failed to predict the attenuation beyond the point where the most-forward ray from the entrance intersected the wall of the annulus. It was practically impossible to analyze the streaming problem by the Sn code with more detailed Sn quadratures. The analytic expression describing the direct component agreed fairly well with the experiment far from the entrance of the annulus.
- 一般社団法人 日本原子力学会の論文
著者
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Oka Yoshiaki
Nuclear Engineering Research Laboratory Graduate School Of Engineering The University Of Tokyo
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AKIYAMA Masatsugu
Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo
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TSUKISHIMA Chihiro
Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo
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HASHIKURA Hiroyuki
Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo
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KONDO Shunsuke
Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo
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