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对某非放射性工厂进行了包括γ辐射水平、氡及氡子体浓度、天然放射性核素活度为主的调查测试。并对该地居民的受照剂量进行了估算。结果表明,该地区地球γ辐射水平较高,高值可达131.6×10~(-8)Gyh~(-)1。厂区和住宅区室内外的氡及子体浓度均高于全省水平,厂属莹石矿中的平衡当量氡浓度高达210.90Bqm~(-3)。剂量估算结果表明,该厂职工每年受到1mSv以上的附加照射,其中部分职工受到12.84mSva~(-1)的附加照射。所以,非放射性单位由于地理环境、气象条件及放射性矿分布等因素影响,工作场所及环境中放射性水平增高,甚至对居民健康产生一定影响,是不容忽视的。
A non-radioactive factory was surveyed including γ-radiation level, concentration of radon and radon and concentration of natural radionuclides. And the dose of inhabitants of the area was estimated. The results show that the earth has a high γ radiation level of 131.6 × 10 ~ (-8) Gyh ~ (-1). Concentrations of radon and its daughter inside and outside the factory and residential areas were higher than the province level, and the equilibrium equivalent radon concentration in the fluorite factory was as high as 210.90Bqm -3. The dose estimation results show that the plant workers are exposed to more than 1mSv of radiation annually, some of whom are additionally exposed to 12.84mSva ~ (-1). Therefore, non-radioactive units due to geographical environment, meteorological conditions and the distribution of radioactive ore and other factors, the radioactive levels in the workplace and the environment increased, and even have some impact on the health of residents, can not be ignored.