Application of coarse mesh method to neutron diffusion calculation for fast breeder reactors.

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概要

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• The improved coarse mesh method, which was originally derived by Askew and extended by Takeda, has been modified and applied to a 1, 000-MWe and a 300-MWe homogeneous FBR core. In the present method, mesh average neutron flux and mesh center neutron flux are distinguished, and transverse neutron bucklings are taken into account. The results of numerical calculations showed that, with the present method, the power distribution and CR worths are appreciably improved for the 1, 000-MWe FBR core with large-pitch fuel assem-blies. When CRs are withdrawn, the use of the present method reduces the error of power distribution by half for both cores. However, it yields less satisfactory results, particularly with repect to CR worths, for the 300-MWe FBR core with small-pitch fuel assemblies.

• 一般社団法人 日本原子力学会の論文

著者

• AZEKURA Kazuo

  Energy Research Laboratory, Hitachi Ltd.

• AIZAWA Hiroko

  Energy Research Laboratory, Hitachi, Ltd.

関連論文

• Simple method for evaluating mesh size effects in control rod worth analysis.
• New finite element solution technique for neutron diffusion equations.
• Calculation model for predicting power distribution in fast reactors.
• Generalization of new finite element method using "imaginary" nodal points.
• Application of coarse mesh method to neutron diffusion calculation for fast breeder reactors.

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