THE SWEDISH PLANS FOR ENCAPSULATION OF SPENT NUCLEAR FUEL

摘要

In Sweden, spent nuclear fuel will be encapsulated in disposal canisters before deposition in a deep repository. Each canister consists of an outer copper canister for corrosion resistance and a cast iron insert for mechanical strength. Trial manufacturing has shown that full-size disposal canisters can be produced according to specifications. An encapsulation plant is planned to be built as an extension to the CLAB interim storage where the fuel is stored today. In the plant, the fuel will be placed in disposal canisters, which will be welded and tested before transfer to the deep repository. The crucial sealing operations will be tested and demonstrated in the Canister Laboratory. The welding trials in the laboratory started in late 1998.