Radiation hazard control report

The report describes results of radiation hazard control at the Atomic Energy Research Institute of Kinki University during the one year period from April 1988 to March 1989. Management of personal exposure dose has been performed using film badges mainly and thermoluminescence dosimeters (TLD) and pocket dosimeters as required. Three types of film badges, for wide range (X-, gamma- and beta-rays), neutrons and gamma rays, have been used, and exposure dose of each worker is examined every three months or once a year depending on the frequency of the use of radiations. The maximum personal exposure dose for a three month period or for the year was 80 mrem (0.80 mSv) and 125 mrem (1.25 mSv), respectively. No one reached the maximum permissible exposure dose. Spatial gamma-ray dose rate was measured in the reactor building and tracer/accelerator building using ionization chamber type area monitors and ionization chamber type survey meters. TLDs and film badges for personal dose control are used to determine the average gamma-ray dose rate in these buildings. Environmental radioactivities were measured for various environmental samples. A small quantity of 137Cs was detected in some plant samples. (N.K.)