伴生放射性矿开发利用场址开放土壤残留放射性水平研究

Study on the residual radioactivity level in the open site of soil for exploitation and utilization of associated radioactive ore

伴生放射性矿开发利用中,伴生的天然放射性核素可能迁移到土壤中,造成土壤放射性污染。本文梳理了我国土壤污染风险管控制度和国际上关于土壤放射性管控的要求,使用RESRAD软件程序,根据不同的土地利用用途,计算推导伴生放射性矿开发利用场址开放土壤残留放射性筛选值,同时与美国监管机构推荐的筛选值进行了比对分析,确定了6种典型核素的土壤残留放射性筛选值,为完善我国土壤放射性污染风险管控制度提供依据。

During the exploitation and utilization of associated radioactive ore,the associated natural radionuclides may migrate to soil and cause soil pollution.This paper analyzes soil pollution risk control regulations in China and internationally.By using RESRAD software program,the screening value of residual soil radioactivity at the open site of associated radioactive ore utilization according to different land use purposes were calculated and deduced.The calculated screening values were compared with those recommended by the U.S.regulatory agency.Therefore,the screening values of soil residual radioactivity of 6 typical radionuclides were determined,which can help improve our country’s soil radioactive pollution risk control regulations.