The invention provides a secondary stacking method for low and medium level radioactive waste cavern disposal, which comprises the following steps: S1, dividing the interior of a disposal tunnel into a plurality of disposal units, and stacking the disposal units in sequence from inside to outside during stacking; s2, primary stacking is conducted, specifically, a first waste package with the surface dose rate larger than a first preset value is stacked in a primary stacking area of the disposal unit; s3, after one-time stacking is completed, cement grouting is conducted on the disposal units, and a hard and anti-radiation engineering barrier layer is formed above the stacked first waste bags; and S4, secondary stacking, wherein a second waste package with the surface dose rate smaller than or equal to a second preset value is stacked in a secondary stacking area on the upper portion of the engineering barrier layer. Compared with the prior art, the secondary stacking method for low and medium level radioactive waste cavern disposal has the advantages that optimization design is carried out for cavern disposal stacking operation, secondary stacking operation is added on the basis of original primary stacking, and the space utilization rate of a disposal tunnel can be effectively increased.
本发明提供了一种低、中水平放射性废物岩洞处置的二次堆码方法,其包括以下步骤:S1,将处置隧洞的内部划分为多个处置单元,堆码时由内向外对处置单元依次进行堆码;S2,一次堆码,在处置单元的一次堆码区内堆码表面剂量率大于第一预设值的第一废物包;S3,一次堆码完成后,对处置单元进行水泥灌浆,在堆码好的第一废物包上方形成一层坚硬且防辐射的工程屏障层;S4,二次堆码,在工程屏障层上部的二次堆码区堆码表面剂量率小于等于第二预设值的第二废物包。与现有技术相比,本发明低、中水平放射性废物岩洞处置的二次堆码方法针对岩洞处置堆码操作进行优化设计,在原有一次堆码的基础上增加了二次堆码操作,能够有效地提高处置隧洞的空间利用率。
Secondary stacking method for low and medium level radioactive waste cavern disposal
低、中水平放射性废物岩洞处置的二次堆码方法
2022-05-17
Patent
Elektronische Ressource
Chinesisch
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