宝兴大理石矿的放射性检测

Dedection of Radioactivity in the Baoxing's Marble

宝兴县境内的大理石资源以其白度高、储量丰、品质优、易开采而享誉中外。对四川省宝兴县陇东镇大理石矿区进行了放射性环境地质调查,通过对取回的大理石样品中226Ra、232Th、40K这3种核素的比活度的测定,根据比活度换算出这几种核素的外照射指数和内照射指数,把所得结果和中华人民共和国国家标准《建筑材料放射性核素限量》中规定的建筑性材料分类标准作对比后发现其内照射指数与外照射指数都符合《建筑材料放射性核素限量》中A类建筑材料和装饰材料的要求,它的产销与适用范围不受限制。

Marble in Baoxing county is renowned China and at abroad for its high whiteness,abundant reserve,good quality.A geological survey of radioactive environment in the marble mine in Baoxing county,Longdong town was done.Through determination of activity of the three nuclein 226Ra,232Th,40K of the marble samples,it is converted external exposure index and internal exposure index of these nucleins.After contrasting the results with building material classification as the provision of China national standard limit of radionuclides in building materials,the external exposure index and internal exposure index meet the requirements of A class of materials and decorative materials.The marketing and application of marble is unlimited.