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建筑石材放射性水平的调查研究
摘要在南京市某建筑石材市场抽取了20个建筑石材样品,用HPGeγ能谱仪测定其天然放射性核素、、的放射性比活度,计算出样品的内照射指数和外照射指数,并据国家建筑材料放射性核素含量最新标准进行分类分析,得出的结果是20个石材样品均为A类装饰装修材料,用途基本不受限制;大部分样品的镭当量活度小于370 Bq/kg;不同种类、不同产地以及不同颜色的石材样品的放射性水平也有一定的差异。当我们选择装饰石材时(尤其室内装饰石材)时应尽量选择放射性水平较低的样品。10587
关键词:建筑石材放射性分类比活度镭当量活度
毕业设计(论文)外文摘要
TitleResearch on radioactivity of the construction stone
materials
Abstract
Twenty samples of construction stone materials have been selected from a Nanjing's building stone material market. Specific activity of natural radionuclide、、 in these materials have been detected by the HPGe γ spectrometer. Then the internal exposure index and external exposure index have been calculated. According to the latest version of national standard on limits of radionuclide in building materials, all of the 20 decoration materials samples belong to class A, so these materials can be used with no restriction. Most of the radium equivalent activity of samples is less than 370 Bq/kg. Different types, different origin and different colors of stone samples of radioactive level also have certain differences. When we choose decorative stone material (especially interior decoration stone) should try to choose the low level of the radioactive samples.
结论26
致谢27
参考文献28
附录A 采取的20个样品图30
第一章绪论
近年来,随着建筑行业的快速发展,各类建材产品用于住房和生活用房逐渐增多,在各类建筑材料中,石材以其色彩丰富、自然、材质坚固耐久等特点正在被大量应用,天然石材主要
摘要在南京市某建筑石材市场抽取了20个建筑石材样品,用HPGeγ能谱仪测定其天然放射性核素、、的放射性比活度,计算出样品的内照射指数和外照射指数,并据国家建筑材料放射性核素含量最新标准进行分类分析,得出的结果是20个石材样品均为A类装饰装修材料,用途基本不受限制;大部分样品的镭当量活度小于370 Bq/kg;不同种类、不同产地以及不同颜色的石材样品的放射性水平也有一定的差异。当我们选择装饰石材时(尤其室内装饰石材)时应尽量选择放射性水平较低的样品。10587
关键词:建筑石材放射性分类比活度镭当量活度
毕业设计(论文)外文摘要
TitleResearch on radioactivity of the construction stone
materials
Abstract
Twenty samples of construction stone materials have been selected from a Nanjing's building stone material market. Specific activity of natural radionuclide、、 in these materials have been detected by the HPGe γ spectrometer. Then the internal exposure index and external exposure index have been calculated. According to the latest version of national standard on limits of radionuclide in building materials, all of the 20 decoration materials samples belong to class A, so these materials can be used with no restriction. Most of the radium equivalent activity of samples is less than 370 Bq/kg. Different types, different origin and different colors of stone samples of radioactive level also have certain differences. When we choose decorative stone material (especially interior decoration stone) should try to choose the low level of the radioactive samples.
结论26
致谢27
参考文献28
附录A 采取的20个样品图30
第一章绪论
近年来,随着建筑行业的快速发展,各类建材产品用于住房和生活用房逐渐增多,在各类建筑材料中,石材以其色彩丰富、自然、材质坚固耐久等特点正在被大量应用,天然石材主要
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