Abstract

The matrix-type multiple reciprocity method has been reformulated to analyze the modified Helmholtz neutron flux mode in a domain which has a strong neutron absorption. The fundamental solutions for the modified Helmholtz mode can be given simply by replacing the imaginary quantity iB 1 in the conventional Helmholtz-type solutions by a real quantity k 1. Test calculations demonstrate the validity of the present reformulation and the usefulness when applied to the nuclear criticality analysis.

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