关于物料解控和场址开放

ON THE CLEARANCE OF MATERIALS AND THE RELEASE OF SITES

本文阐述了受放射性核素污染的物料解控和场址开放的目的 ,比较了解控与豁免的异同点 ,介绍了作为物料解控水平和场址清除标准基础的剂量限制值和约束值 ,讨论了以可测量值表述的物料解控水平 (包括物料表面污染水平和活度浓度 )和场址清除标准 (包括土壤中核素残存量可接受水平和地表氡析出率限制值 ) ,强调了照射情景。

The aim of clearance of materials and release of sites contaminated with radioactive nuclides was expounded,then the identification and difference between clearance and exemption was compared,the foundation of dose limits and dose constraints as the base of clearance levels of materials and cleanup criterion of sites was introduced,the material clearance levels expressed in measurable values (including the surface contamination levels and activity concentrations) and site cleanup criterions (including the acceptable levels of radionuclide in soil and the limit for release rate of radon from soil surface) were discussed. Finally, the effects of irradiation scenarios,models and parameters to recommended values of derived levels and the necessity to pay attention to modifying the derived levels according to the specific condition were also emphasized.