Abstract: Based on domestic and foreign experience data of deposit source terms on main pipes of nuclear power plants, the variation tendency of two main radionuclides Co-58 and Co-60 is analyzed. Furthermore, the deposit source term of activated corrosion products in primary loop of HPR1000 is assessed via a source term calculation software of activated corrosion products in primary loop, compared with those of the widely operated M310 type reactors in China. It is found that the control of deposit source term of HPR1000 is better than domestic generation II reactors and close to international generation III reactors, though the three of them are on the same magnitude.

Key words: HPR1000, activated corrosion product, deposit source term, design source term, actual source term