Abstract:
The feasibility of transmutation of longlived fission product (LLFP)
99Tc and
129I in pressurized water reactor (PWR), baesd on Daya Bay PWR, was analyzed. The calculation results show that the maximum transmutation rate is 15.69% for
99Tc during one refueling cycle of 18 months, and 9.18% for
129I. By analyzing the safety related items of different reactor cores, it is shown that, after introducing LLFPs into PWR, the
keff gets lower and the range of variation with burnup becomes small, and obvious change of the radial neutron flux density of reactor core is not found, but the radial power peaking factor is declined. And also, there is no safety problems for reactivity coefficient and control after considering fuel temperature coefficient, moderator temperature coefficient, differential soluble boron worth and control rod worth. On the contrary, the above parameters get better. In summary, transmutation of
99Tc and
129I in PWR is feasible.