城市固体废物填埋场放射性接收标准研究

Research on Radioactive Acceptance Criterion of Municipal Solid Waste Landfill

  • 摘要: 初步建立了城市固体废物填埋场(MSWL)接收固体废物的放射性接收标准。首先确定放射性接收标准5×10-5的终生致癌性风险作为可接受风险水平目标值,然后结合我国MSWL的设计标准和管理要求,建立MSWL全寿期健康风险评价方法。利用可接受风险水平目标值和健康风险评价方法,推导出MSWL接收固体废物的单位质量的放射性核素限值。结果表明,对于短寿命(T1/2<30 a)人工放射性核素,本文所得放射性接收标准推导值明显大于我国清洁解控标准(如60Co推导值为0.619 Bq/g,清洁解控标准为0.1 Bq/g);对于长寿命(T1/2≥30 a)人工放射性核素,本文所得推导值与我国清洁解控标准值基本相当。

     

    Abstract: The radioactive acceptance criteria for solid waste in municipal solid waste landfill (MSWL) were preliminarily established. First, the radioactive acceptance criterion of 5×10-5 lifelong cancel risk was determined as the target value of acceptable risk level. And then combining with the design basis and the regulatory requirement of MSWL in China, the lifecycle health risk evaluation method for MSWL was established. Finally, using the target value of acceptable risk level and health risk evaluation method, the acceptance limit for radionuclides in solid waste in MSWL was derived. The results show that the derivation activity concentration values of short-life radionuclides (T1/2<30 a) are more than the clearance levels of respective nuclides in the Chinese standards (e.g, the calculated activity concentration value of 60Co is 0.619 Bq/g, and its clearance level is 0.1 Bq/g), and the derivation activity concentration values of long-life radionuclides (T1/2≥30 a) are same as the clearance levels of respective nuclides in the Chinese standards.

     

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