Present status of neutron scattering and CARR neutron scattering project in CIAE

The 15 MW heavy water research reactor (HWRR) at the China Institute of Atomic Energy (CIAE) in Beijing is presently the only neutron source available for neutron scattering experiments in China. A 60 MW tank-in-pool inverse neutron-trap-type research reactor, China advanced research reactor (CARR), is now being built at the CIAE to meet the increasing demand of neutron scattering research in China. The maximum unperturbed thermal neutron flux is expected to be 8×10 ¹⁴ n/cm ² s in the reflector. Seven out of nine tangential and horizontal beam tubes will be used for neutron scattering experiments. Cold and hot sources will be constructed and a 30 m×60 m guide hall will be also constructed. A brief introduction of the HWRR, the existing neutron scattering facilities and research activities using the HWRR, and the CARR and facilities to be built are presented.