Estimating the main radiation source terms for the NICA collider

The various radiation sources at the NICA collider were identified and specified. It is found that the most powerful ones are the beam catchers restricting the beam ??halo??. The double differential neutron yields from the catcher are calculated using the GEANT4 code. A simulation of the total absorbed dose in the magnet superconducting winding due to the catcher radiation is carried out for the accepted levels of beam losses. The induced radioactivity of the catcher is predicted for the collider schedule.