铁路工程勘察中放射性异常的分析计算判定

Analysis,Calculation and Determination of Anomaly of Radioactivity

研究目的:研究铁路工程放射性异常的测试和分析计算判定方法,提出铁路工程放射性异常防护限值和具体防护措施建议。研究方法:通过对有关放射性防护标准的对比,结合铁路工程和人员活动特点,运用数值计算方法分析判定。研究结果:给出了铁路站点、生活区、一般区间和隧道工程放射剂量计算判定方法,提出了铁路工程放射性辐射异常防护界限值及防护措施。研究结论:铁路工程放射性辐射防护应在详细查明辐射强度和分布特征的基础上,评估其影响程度,对于大面积分布的异常地区在铁路选线时应予绕避,对评估确定的异常超限点、带,结合具体工程进行防护。

Research purposes： The research is made on the methods of testing, analyzing, calculating and determining anomaly of radioactivity in railway construction and the preventive threshold values and measures are proposed for anomaly of radioactivity. Research methods：In combination with the features of engineering and man＇ s action, the numerical calculation is adopted for analyzing and determining anomaly of radioactivity based on comparison with the preventive standards for radioactivity. Research results：The methods are offered for calculation and determination of radioactivity dosage in railway station, living area, normal railway section and tunnel construction, and the preventive threshold values and measures are presented for radioactive radiation anomaly. Research conclusions： For prevention of radioactive radiation in railway construction, the influence degree of radioactivityshould be evaluated on the basis of learning the radiation degree and features of its distribution. The railway should bypass those areas in which anomaly of radioactivity exists in most locations when selecting railway route. For those locations with anomaly of radioactivity above the threshold value, the preventive measure should be taken according to the different conditions of each construction.