摘要
The granular tungsten spallation target is proposed by Institute of Modern Physics(IMP)as an innovative target.The granular tungsten target,which is placed in the center of the reactor,is impinged by the high-energy protons to produce spallation neutrons to maintain the stable operation of the system.Meanwhile,the spallation target,as structural material,has an effect on the reactor physical parameters,such as neutron flux,neutron spectra and system reactivity.The mass fraction of tungsten is 93%in the spallation target material,therefore the accuracy of tungsten cross section can impact directly on the reactor physical calculation in CIADS.In the past experiment on tungsten data evaluation,tungsten is generally used as reflecting layer or fuel diluent materials and is almost in fast-spectrum benchmark experiment setups.However,the relative study on the tungsten spallation materials in thermal-spectrum reactor are still scare.
