The results show that high-energy neutrons with En > 20 MeV are of small fraction () in the neutron source, but their contribution to the source efficiency is about 23% for the large scale ADS. Based on this, a neutron source efficiency correction factor is proposed. Tests show that the new correction method works well in the ADS calculation. This method can effectively improve the accuracy of the prediction of the proton beam current. | Effect of high-energy neutron source on predicting the proton beam current in the ADS design
