Sensitivity of characteristics of hybrid reactor to spectra of secondary neutrons

Abstract

The calculated sensitivity coefficients show that in a hybrid reactor the greatest influence on the principal functionals is exerted by the secondary neutron spectra of the reactions /sup 238/U(n, 2n), /sup 23B/U(n, n/prime/) cont, and Fe(n, n/prime/) cont, for which the contribution to the fission rate in /sup 238/U and, therefore, in neutron multiplication per source neutron, may be considerable. The indeterminacy of the functionals, owing to the 15-20% inaccuracy of the spectra, is estimated for the hybrid reactor model studied to be 3-4.5% for the fission rate and 2-2.5% for the tritium yield.