Studies on development of dosimetry technique for neutron and gamma-ray absorbed doses in human body and its applications to effect assessment of criticality accidents (Thesis)

Sono, Hiroki 

A new technique for effect assessment of radiation incidents was required for effective implementation of emergency measures in the early phase of unforeseen circumstances such as criticality accidents. In the present study, a new dosimetry technique for neutron and gamma-ray absorbed doses in human bodies was developed using two kinds of tissue-equivalent dosimeters: an alanine dosimeter and a lithium tetra borate dosimeter. The applications of this technique to personal dosimetry under criticality accident conditions and to retrospective assessment of criticality accident situations were also studied. The experiments and analyses using the Transient Experiment Critical Facility (TRACY) demonstrated that the dosimetry technique and its applications could estimate the magnitude and radiological consequence of criticality accidents precisely enough to plan emergency measures.