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2011年3月11日日本福岛核第一电站由于海啸发生了最终被评为七级的特重大核事故。为了测定核事故后核电站周围残留辐射量以及对居民健康,环境安全等影响,采用直接测量的方法,利用美国Inspector手持式射线检测仪测定了福岛核电站附近环境的表面γ射线吸收剂量率。同时利用高纯锗γ射线检测仪检测Cs-127等人工放射性核素含量。结果显示,当地受辐射影响地区辐射量随与事故中心距离以对数模型形式减少,当地居民甲状腺健康程度并不直接受环境辐射量影响。
March 11, 2011 Japan’s Fukushima nuclear power plant first occurred as a result of the tsunami was rated as seven major nuclear accidents. In order to measure the residual radiation around nuclear power plant and the health and environmental safety of residents after nuclear accident, the direct measurement method was used to measure the γ-ray absorbed dose rate in the environment near Fukushima nuclear power station by using Inspector handheld ray detector. The content of artificial radionuclides, such as Cs-127, was detected by high purity germanium gamma ray detector. The results show that the radiation intensity in the local area decreases logarithmically with the distance to the accident center, and the local residents’ thyroid health is not directly affected by the amount of environmental radiation.