OU Pin, LI Yucheng, YOU Huiyuan, HUANG Lifang, ZHENG Xueting, CHENG Baogen, YU Qingqing, CAO Hongbao, CHENG Jinpeng, TAN Minyu
Objective To master radioactive pollution level of drinking-water in Huizhou caused by operation of Daya Bay Nuclear Power Base within a radius of 30 km of the base. Methods Radioactive levels of gross α,gross β and 40Kβ for source water,processed water and terminal water from seven main tap water supplies were determined to decide whether radioactive pollution on drinking-water is caused by Daya Bay Nuclear Power Base and whether radioactive indexes of drinking-water are in accordance with requirements of water quality,compared to radioactive level of background investigation and screening. Results In high flow period,radioactive levels of gross α,gross β and 40Kβ for source water were(0.009±0.003~0.255±0.029),(0.025±0.003~0.211±0.009)and(0.021~0.111)Bq/L,respectively; radioactive levels of gross α,gross β and 40Kβ for processed water were (0.011±0.004~0.021±0.003),(0.039±0.003~0.143±0.007)and(0.025~0.108)Bq/L,respectively; radioactive levels of gross α,gross β and 40Kβ for terminal water were (0.007±0.003~0.027±0.003),(0.054±0.002~0.123±0.006)and(0.037~0.109)Bq/L,respectively. In low flow period, radioactive levels of gross α,gross β and 40Kβ for source water were(0.011±0.003~0.100±0.008),(0.050±0.003~0.139±0.004) and (0.022~0.069)Bq/L,respectively; radioactive levels of gross α,gross β and 40Kβ for processed water were (0.005±0.002~0.118±0.009),(0.045±0.003~0.119±0.004)and(0.022~0.065)Bq/L,respectively; radioactive levels of gross α,gross β and 40Kβ for terminal water were (0.010±0.003~0.090±0.009),(0.043±0.002~0.112±0.005)and(0.024~0.068)Bq/L,respectively. Conclusion During its operation,the base does not cause obviously radioactive pollution to the drinking-water in Huizhou within a radius of 30 km of the base,and radioactive level of the drinking-water meets the requirements of drinking-water quality.
