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Characterization of Boom Clay anisotropic THM behaviour based on two heating tests at different scales in the HADES URL

To examine the impact of the heat generated by high-level radioactive waste on Boom Clay, two heater tests have been launched in the HADES underground research facility: the small-scale ATLAS Heater Test and the large-scale PRACLAY Heater Test. The major objective of these tests is to confirm and re...

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Main Authors: Chen, Guangjing, Li, Xiangling, Dizier, Arnaud, Verstricht, Jan, Sillen, Xavier, Levasseur, Séverine
Format: Online
Sprog:engelsk
Udgivet: Geological Society of London 2024
Fag:
Boom clay
Economic geology
Environmental geology
Radioactive waste
thema EDItEUR::R Earth Sciences, Geography, Environment, Planning
thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TQ Environmental science, engineering and technology
Online adgang:https://directory.doabooks.org/handle/20.500.12854/139680
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Summary:To examine the impact of the heat generated by high-level radioactive waste on Boom Clay, two heater tests have been launched in the HADES underground research facility: the small-scale ATLAS Heater Test and the large-scale PRACLAY Heater Test. The major objective of these tests is to confirm and refine the thermo-hydro-mechanical (THM) constitutive models and associated parameter values obtained from a laboratory characterization programme. This paper presents the observations from the ATLAS and PRACLAY heater tests and the combined numerical modelling of these tests. To characterize the excavation damaged zone in the clay around these tests, a mechanical model with a strain-dependent elastic modulus is introduced for the Boom Clay. The consistency between the observations from laboratory tests and in-situ tests and the outcomes from the numerical models strengthen the confidence in our understanding of the THM behaviour of Boom Clay. They also enabled us to validate the mechanical model and produce a set of anisotropic THM property values for both intact and damaged Boom Clay.

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