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Feasibility Analysis of the Multilayer and Multicanister Concepts for a Geological Spent Fuel Repository

Won-Jin Cho, Changsoo Lee, Geon Young Kim

Nuclear Technology / Volume 200 / Number 3 / December 2017 / Pages 225-240

Technical Paper /

Received:May 4, 2017
Accepted:August 16, 2017
Published:November 16, 2017

For a spent fuel repository, the possible application of the concepts of a multilayer repository with a two- or three-story disposal tunnel and a multicanister repository in which two or three canisters are emplaced in a deposition hole is assessed from the viewpoint of temperature, mechanical stability, and nuclear criticality. The results show that the concepts of multilayer and multicanister repositories are applicable to the geological repository without deterioration of the mechanical stability and nuclear criticality safety. Their adoption in the spent fuel repository can improve the disposal density up to 200% to 400% depending on the applied peak temperature limit under the given thermal constraint and site conditions.