The method of simplified calculation of resonance absorption neutrons irregularity in absorber block

Simple numerical calculation method of space dependence of resonance absorption of neutrons in the absorber block for a not too absorbing isolated resonance is offered. If macroscopic cross section in peak of a resonance is not great (dΣ ∼ 10), the distribution of effective resonance integral on calculated zones of the block is determined on the basis of approximation of escape probability on one or two nodes, that corresponds to an error of definition In ∼ 2%. The technique permits to calculate a non-uniform distribution of absorber concentration and temperature in the block. Calculated values of resonance integrals on zones of the block for various approximations and errors in percents are shown. 3 tabs., 1 fig., 4 refs