Application of the HGPT methodology of reactor operation problems with a nodal mixed method

The heuristically-based generalized perturbation theory

“…Cacuci says [32]: "Classical perturbation theory certainly cannot be used for optimal operation and control of an ADS". But, while this is true in relation to the classical perturbation theory, "a la Wigner", in which the control role is fictitiously played by the coefficient (l) multiplying the fission source, the same thing cannot be said with respect to the HGPT theory which may account for the real control (the insertion of a control rod, the intensity of the extraneous neutron source strength, etc) [33,34]. Introducing the general frame of optimal control theory does not change this conclusion.…”