Calculation of Neutron Flux Spectrum and Average Neutron Energy for Venus 1^# Assembly

Venus 1^# assembly is a system consisting of both fast and thermal neutron zones for ADS research in China. The neutronics spectrum calculations in Venus 1^# assembly were performed with twodimensional transport code TWODANT. The result shows that the neutron spectra in Venus 1^# assembly are hard enough for the ADS experiments.