The Deep Isolation drillhole waste repository conceptCreated OnNovember 11, 2020Last Updated OnNovember 11, 2020byd33pis0-admin Print You are here: Main Figures and Calculations The Deep Isolation drillhole waste repository concept < All Topics The horizontal section of the drillhole will be 18 inches wide, which will fit the 9 to 13 inch diameter of the disposal canister.