Determination of effective diffusion parameters in thermal reactor assemblies.
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概要
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Effective diffusion parameters have been determined so as to preserve reaction rates in a super-assembly consisting of few assemblies with different neutronic properties. The effective diffusion parameters are used for few-group diffusion calculations in one- and two-dimensional models of thermal reactor cores. The results are compared with those from reference heterogeneous calculations which take into account heterogeneity in each assembly within the framework of diffusion theory, and those obtained by using the conventional flux-weighted group constants. The use of the effective diffusion param-eters results in a much more accurate prediction of the neutron multiplication factor and power densities than those predicted using the conventional flux-weighted group constants when using fine meshes.
- 一般社団法人 日本原子力学会の論文
著者
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Sekiya Tamotsu
Department Of Nuclear Engineering Osaka University
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Takeda Toshikazu
Department of Nuclear Energy, Graduate School of Engineering, Osaka University
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SAJI Etsuro
Department of Nuclear Engineering, Faculty of Engineering, Osaka University
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