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Report No.
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The In-situ experiment for performance confirmation of engineered barrier system at Horonobe Underground Research Laboratory; Production of casing drilling machine for large dimeter pit, simulated overpack, buffer material blocks and backfilling materials

Nakayama, Masashi; Matsuzaki, Tatsuji*; Niunoya, Sumio*

The Horonobe URL Project has being pursued by JAEA to enhance the reliability of relevant disposal technologies through investigations of the deep geological environment within the host sedimentary formation at Horonobe, northern Hokkaido. The in-situ experiment for performance confirmation of engineered barrier system (EBS experiment) had been prepared from 2013 to 2014 fiscal year at G.L.-350m gallery, and heating by electric heater in simulated overpack had started in January, 2015. One of objectives of the experiment is acquiring data concerned with Thermal -Hydrological - Mechanical - Chemical coupled behavior. These data will be used in order to confirm the performance of engineered barrier system. In this report, It is summarized the production of casing drilling machine for large diameter, simulated overpack, buffer material blocks and backfilling material for EBS experiment.

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