NEUTRONICS INTEGRAL EXPERIMENTS OF SIMULATED FUSION-REACTOR BLANKET WITH VARIOUS BERYLLIUM CONFIGURATIONS USING DEUTERIUM-TRITIUM NEUTRONS

Fusion neutronics experiments are performed on a full-coverage blanket with various configurations of a beryllium neutron multiplier. In the basic experimental system, a lithium carbonate enclosure contains a l ithium oxide test zone and a deuterium-tritium neutron source to simul ate a neutron spectrum in a fusion reactor. Five beryllium configurati ons are adopted to examine the effects of neutron multiplication and r eflection by beryllium. The measurements are carried out along the cen tral line in the test Zone. Various measurement techniques are applied to obtain the tritium production rate distribution, which is one of t he most important parameters for assessing the fetal tritium breeding ratio in a fusion blanket. In addition, the reaction rates and the neu tron spectrum are measured to provide test data for confirmation of ca lculation results. These data are compared among six different configu rations of the experimental system. Consistency between the different techniques for each measured parameter is also tested among different experimental systems. The experimental results are compared with the c alculations by DOT3.5 using JENDL9/PRI and /PR2. The calculation diffe rs from the experimental data by < 10%, except for the beryllium zone.