甘肃北山高放废物处置库预选场址远场环境影响模拟评价

Simulation and Evaluation of Far-field Environmental Impacts of Beishan HLW Geological Disposal

以甘肃北山高放废物处置库预选场址为评价对象,收集该预选场址的环境资料,采用Ecolego软件对该场址远场环境进行评价。远场环境评价时考虑的公众受照途径为黑河流域水灌溉和饮用造成的公众辐射剂量。经评价,个人所受剂量在高放废物处置库关闭后随时间逐渐增大,在关闭后1.5X10^6a左右达到剂量率峰值4.66x10^-11 Sv/a,此时,关键核素为135Cs,剂量贡献值为99.1%。

Collecting environmental information from Beishan HLW Geological Disposal, using Ecolego software to evaluate the far-field environment impact of the site. The exposure pathway considered is the individua dose caused by water irrigation and drinking the Heihe River. According to the evaluation, the individual dose increased gradually with time after the disposal facility closed, reaching the peak dose of 4.66x 10^-11 Sv/a after the disposal facility closed 1.5 million years. At this time, the key nuclide was 135Cs, and the dose contribution value was 99.1%.