An external adjoint source for arbitrary responses in Monte Carlo eigenvalue calculations

A new generalized perturbation theory (GPT) equation is derived applying the comprehensive mathematical framework (C-Framework) for Monte Carlo (Mc) eigenvalue calculations. The new GPT equation no longer limits the type of a target response in its application, in contrast to the conventional generalized perturbation theory that has a limited application to the GPT-allowable target response only. It is shown that the new GPT equations are exactly the same as the conventional GPT counterparts for GPT-allowable types of response such as the standard Mc tally and the effective multiplication factor. It is also shown that the new GPT equation can deal with absolute reaction rate and equilibrium xenon concentration which is not GPT-allowable responses. (Author)