Estimations of Population Doses and Risk Estimates from Occupational Exposures in Japan, 1978 Part 1. Determinations of Organ or Tissue Doses and Effective Dose Equivalents

概要

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The International Commission on Radiological Protection (ICRP) has proposed the concept of effective dose equivalent for the purpose of radiation protection programs in occupational exposures. Dose equivalent of radiation workers has been popularly evaluated from the readings of film badges worn mostly on the chest region of the workers. At the present time, the effective dose equivalents must be estimated from the film-badge readings. In order to simplify the determinations of the effective dose equivalents, ratios of organ or tissue doses to unit film-badge reading were calculated with the aid of the Snyder's mathematical phantom constructed so as to simulate the Japanese body. The dose calculations were carried out on the organs or tissues related to stochastic effects of radiations. The energy and angular dependencies of organ or tissue doses were calculated using depth-dose curves experimentally determined with a phantom measurement. The effective dose equivalents were determined with the weighting factor recommended by the ICRP.
日本放射線影響学会の論文