Speaker
Description
Qingjun Zhu a, Qiankun Shao a, Wuhui Chen a, Jie Bao b, Hua Dua a, Songlin Liu a
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.
