Investigation on 90Sr level in offshore seawater and seafood therein around Sanmen nuclear power plant site and assessment of committed effective dose from 2015 to 2019
10.3760/cma.j.issn.0254-5098.2021.04.009
- VernacularTitle:2015—2019年三门核电站周围近海海水与三类海产品中 90Sr放射性水平调查及人群剂量评估
- Author:
Yiyao CAO
1
;
Dong ZHAO
;
Shunfei YU
;
Meibian ZHANG
;
Hua ZOU
;
Zhiqiang XUAN
;
Zhongju LAI
;
Yaoxian ZHAO
;
Peng WANG
;
Hong REN
Author Information
1. 浙江省疾病预防控制中心，杭州 310051
- Keywords:
Sanmen nuclear power plant;
Seawater;
Seafood;
Radioactivity level of 90Sr;
Annual committed effective dose
- From:
Chinese Journal of Radiological Medicine and Protection
2021;41(4):288-292
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate and analyze the radioactivity level of 90Sr in offshore seawater and seafood therein around Sanmen nuclear power plant (NPP) and to estimate the annual committed effective dose to local population from ingestion of 90Sr in seafood from 2015 to 2019. Methods:From 2015 to 2019, the offshore seawater and 3 kinds of marine products grown locally in Sanmen and consumed by local residents were collected for measurement of the level of 90Sr radioactivity. The committed effective doses to the local population were estimated based on monitoring result and consumption data on seafood in Zhejiang offshore. Results:The radioactivity concentrations of 90Sr ranged from 2.4 to 4.1 mBq/L in the seawater, close to the natural radioacrive background level and from 6.7×10 -2 to 1.3 Bq/kg in seafood, lower than the standard values specified in the "Limited concentrations of radioactive materials in foods" (GB 14882-94). Annual committed effective dose to the local population from 90Sr attributable to consumption of seafood in Sanmen County from 2015 to 2019 were 2.2×10 -4-4.2×10 -4mSv, respectively, far lower than the worldwide committed effective dose result ing from internal exposure. Conclusions:From 2015 to 2019, the radioactivity concentration of 90Sr in seawater and seafood are stable, with neglectable dose burden to the local population.
