Neutron Dose Assessment Using 24 Na in Blood for Korean Radiation Workers

Rapid and easy dose assessment must be provided following criticality accident to permit medical staff to determine the appropriate initial treatment for each victim. The KBADA was developed for more rapid and easy neutron dose assessment using 24 Na activity in blood following well-established methods at ORNL. In this study, the results of neutron dose evaluations by the KBADA are shown to be capable of applying to neutron accident dose. Experiments were conducted in the neutron fields of Yonggwang unit 1, 2 and 4, Wolsung unit 3 and the MC-50 proton accelerator. The PMMA slab phantom was used for a human phantom and neuron spectra were also measured. The KBADA program was used to evaluate the neutron doses of experiments using the activity of 24 Na and the neutron spectra. The results showed that the neutron dose assessment using 24 Na in blood could apply to an over-exposure person at a criticality accident.