A nuclear reactor strategy that involves light water reactors (LWRs) and advanced pressurized water reactors (APWRs) with a high conversion ratio was analyzed in a logistical manner assuming a finite resource of ∼5 million metric tons of natural uranium. The emphasis lies in the treatment of the dynamics of deploying this two-component LWR-APWR system. The result is that the improvement of the uranium utilization is a function of time and reaches its maximum value (a factor of ∼3 compared with the classical plutonium recycling) only at the very end of the cheap natural uranium era. In view of the future role of nuclear energy in covering a substantial part of the global energy demand, it is shown that an LWR-APWR reactor strategy could neither reach an acceptable power level nor would it be able to support such a level over a significant period of time. If we want to raise the nuclear capacity to a reasonable level, the early introduction of the fast breeder reactor is unavoidable.