抄録
It is known that a radioisotope disperses in the air from a radioisotope labeled compound in an aqueous solution via the isotopic exchange reaction. In this research, in order to examine the dispersion mechanism of tritium in the air from a tritium labeled compound, the model room which imitated a working room in the controlled area was made, and the radioactivity of the tritium contained in the air of the model room was measured by sampling the air in the model room. It was found that the dispersion rate of tritium in the air increased with the passage time from its purchase. The dispersion rate of tritium from 3H-ATP changed from 0.10% to 0.76% after 17.7 months. Furthermore, the two-dimensional distribution of tritium on the surface of the whole walls in the model room was obtained using an imaging plate technique.
