防城港核电厂运行初期周围环境中90Sr放射性水平调查

Investigation of 90Sr radioactivity level in the environment of Fangchenggang nuclear power plant during initial operation period

目的获取防城港核电厂运行初期周围环境中90Sr放射性水平,评估防城港核电厂周围辐射环境影响。方法依据《辐射环境监测技术规范》(HJ/T 61-2001)等国家相关标准,开展核电厂周边环境中90Sr水平调查。结果 2016-2018年,防城港核电厂周围环境中大气沉降物中90Sr活度浓度范围0.151~3.78 mBq/m2.d,雨水中90Sr活度浓度范围0.317~6.48 mBq/L,饮用水中90Sr活度浓度范围<0.350~2.38 mBq/L,地下水中90Sr活度浓度范围0.403~3.18 mBq/L,地表水中90Sr活度浓度范围<0.353~4.59 mBq/L,海水中90Sr活度浓度范围0.526~4.16 mBq/L,土壤中90Sr活度浓度范围0.160~3.62 Bq/kg,岸边沉积物中90Sr活度浓度范围0.185~0.841 Bq/kg,潮间带土中90Sr活度浓度范围0.363~1.32 Bq/kg,底泥中90Sr活度浓度范围0.180~0.736 Bq/kg,生物中90Sr活度浓度范围<0.0160~5.54 Bq/kg·鲜。结论防城港核电周围环境中90Sr放射性水平在正常范围内波动,与我国其他地区调查结果相近。

Objective This study aims to evaluate the level of 90Sr inthe environment around the Fangchenggang Nuclear Power Plant during its initial operation period.Methods This investigation is conducted according to the national standard of 《Technical criteria of radiation environment monitoring》(HJ/T 61-2001).Results The radioactivity concentration of 90Sr in the sampleswas measured, which were collected during 2016-2018 from the environment of Fangchenggang Nuclear Power Plant,Guangxi,China. The resultsarelisted as follows:forthe atmospheric dust, the range is 0.151~3.78 mBq/m2.d, the rain water 0.317~6.48 mBq/L,the drinking water<0.350~2.38 mBq/L,the ground water 0.403 ~3.18 mBq/L,the surface water<0.353 ~4.59 mBq/L, the seawater 0.526~4.16 mBq/L, the dry soil 0.160~3.62 Bq/kg,the dry shore sediments 0.185~0.841 Bq/kg,the dry soil of tideland 0.363~1.32 Bq/kg,and the dry seawater sediment 0.180~0.736 Bq/kg,the fresh biology<0.0160~5.54 Bq/kg·fresh.Conclusion The radioactivity level of 90Sr around the Fangchenggang nuclear power plant is within the normal range and close to those in other regions of China.