The resonance absorption controlled reactor

In this report a new method of reactor control based on tho isotopic moderator composition variation is studied, taking as a reference a D2O/H2O system. With this method an spectacular increment in the burn-up degree and a sensible reduction of the conventional control system is obtained. An important part of this work has been the detailed analysis of the parameters affecting the neutron spectrum in a heterogeneous reactor. (Author) 50 refs