EVALUATING EQUIVALENT SMALL-GROUP NEUTRON COSTANTS

V. P. Gorelov, G. G. Farafontov
VANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1985. Вып.3. С. 56-61.

      Strong formulae for transition to equivalent small -group constants are discussed. When a transition to equivalent small-group constants is accomplished, it is physically reasonable for secondary neutron numbers in scattering reactions to differ from unity. Equivalently rendering the original multigroup constants isotropic, when the original group number does not change, transport cross-sections don’t occur (that is the reaction cross-sections don’t change), secondary neutron group spectra do change, in parctiular, secondary neutron numbers for scattering reactions become different from unity.