POWER FLATTENING FOR SODIUM COOLED METALLIC FUEL 'CANDLE' REACTOR BY ADDING THORIUM IN INNER CORE

摘要

CANDLE reactor shows excellent performances on the difficult problems inherent to nuclear energy concerning sustainability, safety, bomb and wastes. However, concerning economy we have still problems to be solved. Core height should be as short as possible from economy consideration. In this paper the power density profile is intended flatten for a sodium-cooled metallic-fuel CANDLE fast reactor by adding thorium uniformly in the inner core region. The total power is increased by the factor of 1.28 under the constraint of maximum axially integrated power density. The core height can be also decreased.