摘要
[目的]收集三门核电厂运行前毗邻区域环境中的γ辐射剂量监测数据,确定环境本底水平及短期变化和长期变化趋势,以及评价对当地居民的影响,为居民健康评估、应急事件的应对提供参考,为放射环境管理提供科学依据。[方法]参照相关国家标准,制定三门核电厂宁波毗邻区域地表γ外照射剂量率水平监测技术方案,选取与三门湾核电厂相邻的宁波市N县7个乡镇的13个自然村、X县2个乡镇的6个自然村作为监测点,用热释光累积剂量法监测地表γ辐射剂量,一年4次,每次3个月。监测时段为2011年7月—2013年6月24个月。[结果]对二年监测周期中每12个月4次数据按原野和室内分别进行单因素方差分析,第1个监测周期,原野:F=0.452,P=0.716,室内:F=0.442,P=0.723。第2个监测周期,原野:F=0.345,P=0.793,室内:F=0.261,P=0.853。表明无论是室内还是原野的地表γ辐射水平均无明显季节性差异。该地区人均年有效剂量为0.87 mSv。[结论]三门核电厂宁波毗邻区域地表γ外照射剂量率在正常水平,本次调查为该核电厂宁波毗邻区域地表γ外照射剂量率建立了核电厂运行前的本底数据。
[ Objective ] To monitor the gamma radiation dose in terrestrial environment near the Sanmen Nuclear Power Plant prior and posterior to its commercial debut, determine the background level, short-term and long-term trends, and evaluate its effects on nearby residents. [ Methods ] A monitoring protocol for the gamma radiation dose in terrestrial environment near the nuclear power plant was developed according to the relevant national standards. Thirteen villages in seven towns of County N and six villages in two towns of Count X were selected as the monitoring sites, all in the prefecture of Ningbo and proximity to the nuclear power plant. Gamma radiation dose rate was measured by cumulative thermoluminescence dosimetry using three months as basic time scale, four times a year. The data collection work was clone in the period from July 2011 to June 2013. [ Results ] The data were classified into two groups ： field and indoor data. The results of ANOVA showed no seasonal difference in the gamma radiation doses from field or from indoor （for 2011, field： F=0.452, P=0.716; indoor： F=0.442, P=0.723; for 2012, field： F=0.345, P=0.793; indoor： F=0.261, P=0.853）. The annual effective dose per capita was 0.87 mSv. [ Conclusion ] The gamma radiation dose rate in terrestrial environment near the Sanmen Nuclear Power Plant is at a normal level. This paper provides a background level of the gamma radiation dose before the plant＇s commercial debut as reference for further radiation surveillance program design.
出处
《环境与职业医学》
CAS
北大核心
2014年第3期217-219,共3页
Journal of Environmental and Occupational Medicine
基金
三门湾经济区域宁波居民核辐射健康风险评估研究项目(编号:2012A610188)
关键词
Γ辐射
辐射剂量
人均年有效剂量
核电厂
gamma radiation
radiation dose
annual effective dose per capita
nuclear power plant
