Intermediate Neutron Resonance Absorption in Heterogeneous Systems

Neutron Resonance Theory for Nuclear Reactor Applications: Modern Theory and Practices.

“…(3) IR-Approximation analogous to the original derivation by Goldstein and Cohen [95] intended for the homogeneous media which was later extended to the heterogeneous media by Sehgal and Goldstein [96]. Alternatively, if the NR-approximation for the diluents is not assumed, one obtains (IV.…”

“…For instance, a two-term rational approximation based on the IR-approximation of Eq. (IV.3.38) was developed by Ishiguru and Takano [96] in the late 1960s. More recently, the method was further examined by Chen and Gelbard [97] utilizing the NR-flux computed by the Monte Carlo method which is much less inhibited by the geometric complexity of the lattice.…”

Lattice Dependence of the Equivalence Relation

“…( 2) which will yield an equivalence relation giving an accurate description of the lattice arrangement we simply equate the resonance integrals given by Eqs. (10) and ( 4 ).…”