Abstract: This work is based on the national disused radioactive sources (DRS) centralized storage repository and the Northwest Low and Intermediate Radioactive Solid Waste Disposal Site. The engineering verification of DRS disposal was carried out for the first time. Through retrieval, verification, encapsulation and barrel fixation of 1 102 Class Ⅳ and Class Ⅴ DRS, packages that meet acceptance requirements of the disposal site were formed and disposed. The conditioning and disposal process of DRS for the purpose of disposal was established. The feasibility and rationality of the process flow of DRS retrieval, verification, conditioning and disposal were verified, which laid a technical foundation for the next large-batch and higher activity DRS disposal in China.

Key words: disused radioactive sources, near-surface disposal, process design, engineering verification