Study On Fusion Core Physics Parameters Of Fusion-Driven Subcritical System

Energy source is one of important conditions for humans' survival and development. Now with the rapid progress of world economy, it is in urgent need of energy sources than before whatever in developed or developing countries. Conventional energy source such as coal, oil, and natural gas has to cope with some troubles including how to deal with the environment pollution and how to solve the shortage of natural resources. For so many shortcomings that they can't support persistent development, so it's urgent for scientists to find new clear energy source. Nuclear fusion will be able to provide us with perpetual energy. However, it's long way for human beings to obtain large-scale commercial fusion energy. But we believe that fusion energy will realize finally.Under the leadship of Chinese Academy of Sciences, we have researched the plasma physics and engineering parameters of the FDS (Fusion-Driven Subcritical System). The Fusion-Driven Subcritical System (FDS) is a Subcritical nuclear energy system drived by fusion neutron source. Based on 0-D Core physics model, the core parameters of low, moderate and high aspect ratio are calculated by system code. In addition, an advanced plasma configuration for FDS system has been proposed, which aims at high beta, high bootstrap current and good confinement. In order to determine the feasibility of FDS operation, a two-dimensional time dependent free boundary simulation code has been adopted to simulate time-scale evolution of plasma current profile and boundary position. The results show that the calculation is reasonable. On the basis of extensive investigation on world demonstrate reactor including the U.S, European, Japan and Russian, a preliminary fusion core conceptual design proposal for pure fusion demonstrate reactor FDS-II has been presented.