RADIATION PROTECTION OF CSR

摘要

The construction of CSR (Cooling Storage Ring) which include a main ring (CSRm) and an experimental ring (CSRe) will be started in this year. Heavy ions of carbon to uranium will be accelerated up to 900MeV/u and 400MeV/u at intensity of 10~8 pps. The HIRFL (Heavy Jon Research Facility in Lanzhou) will be used as injector. For the shielding design of CSR, the secondary neutrons due to ion beam loss and their spectra, angular distribution were estimated based on experimental results. The dose equivalent at the shield surface and in the surrounding environment, neutron skyshine dose equivalent were also estimated in this study. The experimental results, neutron yield, spectra and angular distributions for 400 MeV/u ~(12)C+Cu reaction, were used for estimating the source term of shielding design. It is found that the most important environmental radiation impact component of CSR is the skyshine neutrons.