Nuclear Waste Solidification, Storage and Repositories

LOCKIT® Solidification

What we do at our own solidification plant in Loviisa

• The solidification plant is an independent unit and designed to handle all of the liquid waste during NPP operation, decommissioning and interim storage of spent fuel
• The matrix is based on cement and blast furnace slags
• Processes are operated from a control room
• Main waste streams are ion exchange resins and sludge
• Waste and binders are dosed and mixed in a final disposal package

What makes the LOCKIT® cement matrix special

• The cement matrix developed by Fortum is more than twice as efficient as the traditional matrix
  • Waste content of the solidified product is 40%-50%
  • The cost is practically the same as in the case of traditional cementation
• The recipe development started in 1980 and the work on perfecting the recipe continues
  • Targeting over 55% waste content without diluting the matrix quality
• The tests of exposing the matrix to underground water have shown that the matrix has not weakened after four years
• Suitable for all types of LILW