Perturbation Integrals for Two Group Calculations and Application to Reflector Ducts

Two group perturbation theory of thermal reactors is reviewed and tables of fluxes, adjoint fluxes, arbitrary coefficients, and computation constants are given. A general reactivity formula in matrix notation is derived, and integrals needed in the evaluation of perturbations in the core and reflector are tabulated. The special problem of a reflector void of constant cross-sectional area is also considered.