Estimation of Carbon-14 Production in HFETR

The core reactivity change from AlN targets and ¹⁴C producing rate is estimated by calculating the using distribution of reactor neutron, while the fuel management code of HFETR is used to contrast with the estimation calculation. The calculation result shows that it causes about 250×10^-5 reduction of reactivity and core life will be cut down about 65 MW·d when all the 80 fuel assembly center holes are filled with 4000 gram AlN targets, while 1.0×10¹² Bq ¹⁴C could be produced per year. The estimation results accord well with HFETR reactor core design and operation status.