CONCEPTUAL DESIGN STUDY OF ADVANCED POWER-REACTORS

Conceptual design studies of advanced power reactors are summarized. T he concept of power reactors cooled by supercritical water was develop ed. The coolant system is once through type like a supercritical fossi l-fired power plant. It attains higher thermal efficiency and simpler reactor system than the Light water reactors. Breeding is possible in the tight lattice core. The coolant void reactivity of the fast reacto rs becomes negative by placing a thin zirconium hydride layer between seed and blanket. The basic safety principles follows those of LWRs. H eterogeneous cores of the liquid metal cooled fast breeder reactor was designed for assessing the effectiveness of coolant orificing. Overpo wer transients after withdrawing a peripheral control rod were analyse d by a three-dimensional space-time kinetics code which was developed for the study. The space-time power variations were more influential o n boiling behavior in the heterogeneous cores. Conceptual design of th e fusion-fission hybrid reactors and the inertial confinement fusion r eactor were described for comparing with the fission power systems. Th e differences in heat generation profiler; and technical features are discussed. (C)1997 Elsevier Science Ltd.