Effective Spatial Homogenization with Neutron Leakage Effect for FBR Control Rods

Yoshiaki SASAKI; Shunii ONO; Takeo NISHIGORI; Toshikazu TAKEDA

doi:10.3327/jnst.22.320

Yoshiaki SASAKI, Shunii ONO, Takeo NISHIGORI, Toshikazu TAKEDA

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Keywords: spatial homogenization, FBR type reactors, control rod worths, calculation, neutron leakage, supercell, fixed boundary sources, collision pro-bability, effective cross section, one-dimension, control elements

JOURNAL FREE ACCESS

1985 Volume 22 Issue 4 Pages 320-327

DOI https://doi.org/10.3327/jnst.22.320

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Abstract

An effective homogenization of control rods is studied by considering neutron leakage as a fixed boundary source. Good numerical convergence is seen in the iterative calculation of effective homogenized cross sections that preserve integrated reaction rates. Usefulness of the present method is demonstrated by treating off-center control rods in a one-dimensional slab model of an FBR.

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