The volume of helium gas in each canister would cause it to explode long before 100,000 years resulting in the contamination of the Baltic Sea by the equivalent of 2000 Chernobyl accidents. 


More information on radioactive gas is provided here;

In the following video, Dr. Busby explores the risk model contained in the environmental report for this repository. He explores the fallacy of the radiation standard used in the report. 

They claim that the radiation in this repository will all be gone in 100,000 years and be back to ‘natural’ uranium background levels. This is manmade uranium, not ‘natural’ uranium. 

He explores the fact that the half life of uranium is BILLIONS of years, not 100,000 years. For more information, go to; 

By combining the gas leaking from this repository and the billions of years that this has to stay safe, it does not sound like they really planned this out very well.