The compact torus/toroid (CT) as future fusion reactor is presented. The field reversed configuration (FRC) is alternative thermonuclear scheme with properties of compact tori as both open and closed systems. By plasma confinement method field reversed configuration is closed magnetic trap. Mathematical model of plasma core in the fusion reactor is shown. Power balance for the FRC confinement chamber is calculated. The formula for bremsstrahlung more accurate in the temperature range of advanced fuel is presented. D- 3He-6Li fuel cycle is proposed and reactor schemes are discussed.