The medium term storage might but the long term storage sections will be sealed and I don't think it would be cost effective (or super possible) to actually uns

The medium term storage might but the long term storage sections will be sealed and I don't think it would be cost effective (or super possible) to actually unseal it. The copper capsules will be buried 500m in the bedrock, the capsules will then be placed inside a hole which will later be covered by bentonite clay. As the sections fill up that will also be filled with clay.