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ELSA - Experiment

This report summarizes the findings of the ELSA experiment, focusing on boundary conditions and requirements for shaft seals in German salt and clay host rocks. It outlines preliminary investigations, including process-level modeling to enhance understanding. The report includes optimization efforts for shaft sealing concepts in both salt and clay environments, laboratory investigations involving THM and CH experiments on buffer and sealing materials, and performance assessment modeling. It also details in-situ tests of compaction procedures and large-scale demonstration tests of sealing components across various project phases.

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ELSA - Experiment

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  1. ELSA - Experiment • Boundary conditions and requirements for shaft seals in the host rocks salt and clay in Germany (completed, final report being prepared) • Preliminary investigations: Process level modelling to increase process understanding • Optimization of the preliminary shaft sealing concept for salt environment • Development of a modular based shaft sealing concept for a clay environment • Laboratory investigations (THM & CH experiments on buffer/sealing materials) • Process level modelling • Performance Assessment modelling • Further development and (in-situ) test of • compaction procedures for salt grit • a binary mixture of prefabricated blocks + salt grit • injection procedure (EDZ) • specific bitumen elements • accelerated and uniform bentonite plug saturation • Large scale in-situ demonstration test of individual functional shaft sealing • components (sealing and/or supporting modules) Phase 1 Phase 2 DOPAS related activities (WP3/WP5) Phase 3

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