The research on the disposal technique of cross linked polyethylene High Integrity Container

This paper investigates the current status of disposal technologies for cross-linked polyethylene High-Integrity Containers (HICs) abroad, analyzes the relevant requirements for the disposal of cross-linked polyethylene HICs, and formulates a specific solution based on these requirements. A near surface disposal solution has been designed, which involves storage HICs into shafts mixed with metal drums in cement cell units. This solution addresses issues such as the structural load-bearing of HICs, resin decomposition and gas (H₂)release due to radiation, and the Impact of radiation exposure between HIC drums and long-term durability. Compared to the American approach of placing HICs into shielded containers and the domestic practice of using cement solidification processes, this solution results in a smaller final disposal volume for waste drums, contributing to waste volume reduction. The proposed design ensures the long-term safety disposal of HICs.