Speaker
Description
Qingjun Zhua, Qiankun Shaoa, Wuhui Chena, Jie Baob, Hua Duaa, Songlin Liua
a. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China
b. Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
Abstract:The tritium production performance of the fusion blanket reaches the expected index, which is the primary prerequisite for the fusion reactor to realize tritium self-sustaining operation. The demonstration of this premise has a decisive impact on the design of fusion blanket. In order to verify the reliability of the neutronics design tool, i.e. MCNP and FNEDL databases, the mock-up of water-cooled ceramic breeder (WCCB) blanket and supercritical carbon dioxide cooled Lithium-Lead (COOL) blanket were developed, and the neutronics experiments were carried out using DT neutron generator, the simulated and experimental values (C/E) of neutronics parameters represented by tritium production rate (TPR) were analyzed. In order to realize the consistency of TPR simulation and measurement in neutron source terms, the real-time source item analysis program based on the associated particle spectra for DT neutron generator source item was developed. For TPR validation, two independent technologies were used, including the Li2TiO3/Li2CO3 pellets as off-line TPR detectors, and the developed lithium glass detectors as on-line TPR detectors. The TPR validation was complemented by evaluating the neutron-induced reaction rates of activation foils. The experiments are in good agreement with the simulations in the central axis of mock-up, while it was indicated that there are unexpected scattered neutrons in the edge region of the mock-up, resulting in the higher TPR than expected.
