某地区环境样品中^(90)Sr的放射性水平测量及该地区成人剂量评价

Measurement of ^(90)Sr radioactivity in a certain environmental sample and evaluation of dosage in local residents in the area

目的探讨某地区环境样品中90Sr的放射性水平,评价该地区成人因90Sr所致个人年有效剂量。方法根据国家标准采集水体、土壤、生物样品,经前处理后利用放化方法对其进行90Sr测量分析,进而评价驻地居民所受年有效剂量。结果该地区水样、土壤样、生物样中90Sr比活度均较低,所致该地区成人的年有效剂量为1μSv,仅为国家标准规定的年剂量限值的1‰。结论该地区90Sr引起的对公众的照射微乎其微。

Objective To investigate the ^90Sr radioactivity in a certain environmental sample,and also to evaluate annual individual effective dose in local residents. Methods Water,surface soil and biologic samples were collected in accordance with related national standards,then,after pretreatment,radiochemistry was used to detect and analyze ^90Sr radioactivity in the samples,and annual effective dose in local residents was evaluated based on the detected data. Results The ^90Sr specific activity in water,surface soil and biologic samples in the region was relatively low,annual effective dose rate of ^90Sr in local residents was 1 μSv yearly,just 1‰ of the annual limit specified by national standards. Conclusion The annual effective dose rate of ^90Sr in the local people could be termed as negligible.