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目的通过开展在建的海南昌江核电站周围环境饮用水放射性监测,建立该核电站周围环境饮用水放射性基线数据库。方法采用饱和厚度相对测量法,总α、总β分别用厚样法、薄样法。结果总α、总β范围分别为(0.0001~0.0944)Bq/L和(0.0140~1.1029)Bq/L,几何均数分别为0.0028 Bq/L和0.0513 Bq/L;地下水总β比地表水高,差别有统计学意义(t=3.319,P<0.05);水源水总α、总β略高于出厂水;井水、泉水总α、总β比出厂水高,差别有统计学意义(t=2.146、3.301,P<0.05);井水、泉水总β较末梢水高,差别有统计学意义(t=2.861,P<0.05);分散式供水总α、总β比集中式高,差别有统计学意义(t=2.355、3.293,P<0.05);枯水期总α比丰水期高,差别有统计学意义(t=9.876,P<0.05)。结论昌江核电站周围环境大部分饮用水样品总α、总β放射性水平符合国家生活饮用水标准;总α、总β在海南省饮用水正常放射性本底水平内,且与国内其它地区相比处于相对低的水平。
Objective To establish a radioactive baseline database of drinking water in the surrounding environment of this nuclear power plant by carrying out radioactive monitoring of drinking water in the surrounding environment of Hainan Changjiang Nuclear Power Station under construction. Methods The relative thickness of the measurement method, the total α, total β were thick and thin samples, thin sample method. Results The total α and total β ranged from 0.0001 to 0.0944 Bq / L and from 0.0140 to 1.1029 Bq / L respectively, with geometric mean values of 0.0028 Bq / L and 0.0513 Bq / L, respectively. The total β of groundwater was higher than that of surface water, The difference was statistically significant (t = 3.319, P <0.05); total α and total β of source water were slightly higher than that of factory water; total well β and total β of well water and spring water were higher than those of factory water (t = 2.146, 3.301, P <0.05). The total β of well water and spring water was higher than that of the peripheral water (t = 2.861, P <0.05) Statistical significance (t = 2.355,3.293, P <0.05); dry season total α than the wet period, the difference was statistically significant (t = 9.876, P <0.05). Conclusions The total α and total β radioactivity of most drinking water samples around the Changjiang NPP are in line with the national drinking water standards. The total α and total β are within the normal radioactive background of drinking water in Hainan Province and are relatively high compared with other parts of China Low level.