**5. Conclusions**

To validate 232Th nuclear data, the fusion neutronics experiments for the three kinds of thorium assemblies with a D-T neutron source have been carried out. The two spherical assemblies based on the DU and PE shells, and the cylindrical assemblies based on ThO2 have been designed and established. The assembly materials are referable to the conceptual design of subcritical blanket of a hybrid reactor. The 232Th(n,γ), 232Th(n,f), and 232Th(n,2n) reaction rates in the assemblies are measured by the foil activation technique. The results show that the developed activation approach can work well for the experiments, and the 232Th reaction rates are relevant to neutron spectra in assemblies. The reaction rate ratios of 232Th capture to fission are obtained. The fuel and neutron breeding properties under different neutron spectra are compared and analyzed. The leakage neutron spectra from ThO2 cylinders are measured. The experimental results are compared to the numerical results calculated by using the MCNP code with different evaluated data. The results show that the experiments are benefit to validate Th nuclear data and support the conceptual design of subcritical blanket with thorium in a hybrid reactor. Furthermore, it should be beneficial to measure relevant 232Th excitation curve at white neutron source of China Spallation Neutron Source (CSNS) [29] for verifying 232Th nuclear data.
