Dismantling of the Mock Up Josef in situ experiment after 10 years of operation Comprehensive analysis of the bentonite barrier

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00382864" target="_blank" >RIV/68407700:21110/24:00382864 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.5281/zenodo.15071772" target="_blank" >https://doi.org/10.5281/zenodo.15071772</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5281/zenodo.15071772" target="_blank" >10.5281/zenodo.15071772</a>

Result language

angličtina

Original language name

Dismantling of the Mock Up Josef in situ experiment after 10 years of operation Comprehensive analysis of the bentonite barrier

Original language description

The Mock Up Josef experiment simulate d the vertical disposal of a container surrounded by bentonite in a granitic rock environment. This approx. 50 % scale model height 2.2 m, diameter 0.7 m) was constructed by a Czech Technical University team from 2010 to 2012 and was installed in situ at the Josef Underground Laboratory at the end of 2012. The buffer consisted mainly of 33 layers of blocks of compacted Czech Ca Mg bentonite (Bentonite 75; dry density of approx. 1768 kg/m3). Samples for the determination of corrosion were placed with in the experiment: stainless steel 1.4541; carbon steel 1.6368; copper; titanium; nickel and tin bronze The top lid and the bottom of the experiment, as well as the perforated outer shell of the buffer were constructed from stainless steel and the heater was surrounded by thin copper plate. The temperature along the contact of the heater with the bentonite buffer was maintained at approx. 90 °C. Samples were taken from the buffer and analysed at approximately one year interval s d uring the operation of the experiment. The maximum depth of the core sampling was 133 cm from the lid of the experiment (i.e. to below the mean height of the experiment 2 The heater was switched off in mid September 2022, i.e. after almost 10 years of operation. The experimental vessel was opened at the end of October 2022 and disassembling/ sampling was performed up to early December 2022. This was followed by the comprehensive analysis in 2023 with a summary of the results in the respective report.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů