Monitoring and analysis of total α and total β levels in drinking water around Qinshan Nuclear Power Plsnt in 2018
10.3760/cma.j.issn.0254-5098.2019.07.007
- VernacularTitle:2018年秦山核电站周边饮用水中总α和总β放射性水平的监测与分析
- Author:
Zhenggui DING
1
;
Shencong LYU
;
Zan HU
Author Information
1. 浙江省嘉兴市疾病预防控制中心环境职业辐射卫生科 314050
- Keywords:
Drinking water;
Radioactive level;
Residue rate
- From:
Chinese Journal of Radiological Medicine and Protection
2019;39(7):517-522
- CountryChina
- Language:Chinese
-
Abstract:
Objective To ascertain the background levels of total α and total β radioactivity in drinking water around Qianshan Nuclear Power Plant (QNPP). Methods Under the National Health and Wellness Committee′s program, 11 monitoring points within 30 km of QNPP were selected in Haiyan County in 2018. The samples of raw water, factory water and tap water were collected in the first half and the second half of the year, respectively, and determined and analyzed according to Standard Examination Methods for Drinking Water - Radiological Parameters (GB/T 5750.13-2006). The total α and total βlevels in the tested drinking water were evaluated under the Standards for Drinking Water Quality ( GB 5749-2006) . Results A total of 22 water samples were collected from 11 sampling points in April and September 2018, respectively. The residue rate obtained after drinking water was dried varied, dependent on different types of water, which could be up to 0.0337％. The total α levels in different types of water ranged from 0.008 to 0.04 Bq/L, averaged on (0.015±0.009) Bq/L, whereas the total β levels ranged from 0.014 to 0. 320 Bq/L with an average of ( 0. 188 ± 0. 068) Bq/L. There was statistically significant difference in totalαlevels between raw water and factory water ( Z=-2.286, P<0.05) , without statistically significant difference between residue rate and totalαand totalβlevels ( P>0.05) . The background levels of total α and total β radioactivity in 93 drinking water samples in 2016 and 2017 were also investigated, combined with a total of 115 water samples from different water bodies in 2018. There was statistically significant difference in total α and total β levels in tap water between 2017—2016 and 2018 ( Z=-2.976, -2.031, P<0.05), between 2016 and 2017 (Z=-2.042, -3.214, P<0.05) and between 2017 and 2018 (Z=-20. 112, -2.511, P<0.05). Conclusions The operation of nuclear power plant has no impact on radioactivity level in drinking water around QNPP. The drinking water around QNPP is safe.
