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Spatial homogenization method and acceleration method for neutronics calculation codes

Tada, Kenichi   

Many accelerated methods are introduced and implemented to increase the speed of the neutronics calculation. However, there is no good Japanese text book, which explains these methods for beginner. This paper explains the detail of these methods and example of the application of the diffusion calculation code. The coarse mesh diffusion calculation method is widely used for the current neutronics analysis codes and this method is used spatial homogenization method. To improve the understanding of this method, this paper also explains the spatial homogenization methods. This paper explains the discontinuity factor and the Superhomogenization (SPH) method for the spatial homogenization method and the Successive Over Relaxation (SOR) method, the Chebyshev extrapolation method, the Wielandt method, the Coarse Mesh Rebalance (CMR) method, the Coarse Mesh Finite Difference (CMFD) method, and the Generalized Coarse Mesh Rebalance (GCMR) method for the acceleration method.



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