The definition of the characteristic kinetic parameters of a subcritical source-driven system constitutes an interesting problem in reactor physics with important consequences for practical applications. Consistent and physically meaningful values of the parameters allow to obtain accurate results from kinetic simulation tools and to correctly interpret kinetic experiments. For subcritical systems a preliminary problem arises for the adoption of a suitable weighting function to be used in the projection procedure to derive a point model. The present work illustrates a consistent factorization-projection procedure which leads to the definition of the kinetic parameters in a straightforward manner. The reactivity term is introduced coherently with the generalized perturbation theory applied to the source multiplication factor ks, which is thus given a physical role in the kinetic model. The effective prompt lifetime is introduced on the assumption that a neutron generation can be initiated by both the fission process and the source emission. Results are presented for simplified configurations to fully comprehend the physical features and for a more complicated highly decoupled system treated in transport theory.
|Publication status||Published - 2006|
|Event||PHYSOR-2006 - American Nuclear Society's Topical Meeting on Reactor Physics - , Canada|
Duration: 1 Jan 2006 → …
|Conference||PHYSOR-2006 - American Nuclear Society's Topical Meeting on Reactor Physics|
|Period||1/1/06 → …|
All Science Journal Classification (ASJC) codes