Dose evasion of Hiroshima ground-zero survivor

Abstract

Research of radiation protection for the public as nuclear terrorism measures becomes a today's task. Historical example is important as this kind of study. We focus effect of indoor evacuation here. For one part of 74 Hiroshima-survivors confirmed in zero grand 500 m radius of range, a personal dose has been evaluated by the measurement of chromosome aberration rate. We define the ratio between this personal dose and outdoors dose without any shielding for the initial nuclear radiation as effective dose evasion rate. The value was estimated to be between 0.003 and 0.03 for the ground-zero-survivors.