花岗石材料氡析出率调查及分析

摘要

采用积累法，通过测氡仪RDA7测定出花岗石氡浓度。结合核行业标准中对氡析出率的理论，计算得到所选取的北京市某石材市场的19种花岗石的氡析出率，探究影响氡析出率的因素，为今后在选择花岗石装修或制定防氡降氡措施方面提供指导性建议。研究发现不同地区、不同颜色的花岗石氡析出率有差别。因此，尽量选用氡析出率水平较低的石材用于居室内装饰，降低所接受的辐射伤害。%In this paper,we adopted the accumulation method,with the RDA7 to determine radon concentration on granite,combing with the theoretical calculations of the radon exhalation rate,which is from nuclear industry standard,we obtained the results of radon exhalation rate on 19 kinds of granite,which are selected from a stone market in Beijing. We explored the factors of radon exhalation rate,to provide guidance and advice on the choice of granite decoration and the measures of radon prevention and reduction. The study found that different regions and different colors lead to the differences on radon exhalation rate. Therefore,it was suggested to use the stone with lower level of radon exhalation rate in order to reduce the radiation damage.