The large-scale in situ PRACLAY heater test: First observations on the in situ thermo-hydro-mechanical behaviour of Boom Clay

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The large-scale in situ PRACLAY heater test: First observations on the in situ thermo-hydro-mechanical behaviour of Boom Clay. / Dizier, Arnaud; Chen, Guangjing; Verstricht, Jan; Li, Xiang Ling; Sillen, Xavier; Levasseur, S.

In: International Journal of Rock Mechanics & Mining Sciences, Vol. 137, 104558, 01.01.2021, p. 1-16.

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@article{8a6970b396924887a28792c873c6e52f,
title = "The large-scale in situ PRACLAY heater test: First observations on the in situ thermo-hydro-mechanical behaviour of Boom Clay",
abstract = "In the frame of RD&D on the geological disposal of radioactive waste in Belgium, the large-scale PRACLAY heater test is being carried out in the HADES underground research facility (URF) in Mol (Belgium). The thermo-hydro- mechanical (THM) behaviour of Boom Clay has been studied over several decades through small-scale laboratory tests and intermediate scale in situ experiments. The intermediate-scale in situ experiment ATLAS allowed to observe the impact of heat on the Boom Clay beyond the zone affected by the drilling of the borehole hosting the heater. On November 3, 2014, the in situ large-scale PRACLAY heater test was started, aiming at studying the THM behaviour of the clay in the near field, i.e. within the excavation damaged zone, and in the far-field of a heated gallery. An extensive monitoring network installed around the PRACLAY gallery allows to observe the evolution of temperature and pore water pressure in the Boom Clay. In this paper, the first observations that have been made since the start of the PRACLAY heater test are reported. These observations generally confirm the knowledge gained previously from experiments performed at smaller scales. The PRACLAY heater test provides a realistic estimate of what the thermal pressurisation of the Boom Clay would be around a geological disposal facility.",
keywords = "Boom clay, Radioactive waste, Heater test, Thermo-hydro-mechanical behaviour, Large-scale test",
author = "Arnaud Dizier and Guangjing Chen and Jan Verstricht and Li, {Xiang Ling} and Xavier Sillen and S. Levasseur",
note = "Score=10",
year = "2021",
month = "1",
day = "1",
doi = "10.1016/j.ijrmms.2020.104558",
language = "English",
volume = "137",
pages = "1--16",
journal = "International Journal of Rock Mechanics & Mining Sciences",
issn = "1365-1609",
publisher = "Elsevier",

}

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TY - JOUR

T1 - The large-scale in situ PRACLAY heater test: First observations on the in situ thermo-hydro-mechanical behaviour of Boom Clay

AU - Dizier, Arnaud

AU - Chen, Guangjing

AU - Verstricht, Jan

AU - Li, Xiang Ling

AU - Sillen, Xavier

AU - Levasseur, S.

N1 - Score=10

PY - 2021/1/1

Y1 - 2021/1/1

N2 - In the frame of RD&D on the geological disposal of radioactive waste in Belgium, the large-scale PRACLAY heater test is being carried out in the HADES underground research facility (URF) in Mol (Belgium). The thermo-hydro- mechanical (THM) behaviour of Boom Clay has been studied over several decades through small-scale laboratory tests and intermediate scale in situ experiments. The intermediate-scale in situ experiment ATLAS allowed to observe the impact of heat on the Boom Clay beyond the zone affected by the drilling of the borehole hosting the heater. On November 3, 2014, the in situ large-scale PRACLAY heater test was started, aiming at studying the THM behaviour of the clay in the near field, i.e. within the excavation damaged zone, and in the far-field of a heated gallery. An extensive monitoring network installed around the PRACLAY gallery allows to observe the evolution of temperature and pore water pressure in the Boom Clay. In this paper, the first observations that have been made since the start of the PRACLAY heater test are reported. These observations generally confirm the knowledge gained previously from experiments performed at smaller scales. The PRACLAY heater test provides a realistic estimate of what the thermal pressurisation of the Boom Clay would be around a geological disposal facility.

AB - In the frame of RD&D on the geological disposal of radioactive waste in Belgium, the large-scale PRACLAY heater test is being carried out in the HADES underground research facility (URF) in Mol (Belgium). The thermo-hydro- mechanical (THM) behaviour of Boom Clay has been studied over several decades through small-scale laboratory tests and intermediate scale in situ experiments. The intermediate-scale in situ experiment ATLAS allowed to observe the impact of heat on the Boom Clay beyond the zone affected by the drilling of the borehole hosting the heater. On November 3, 2014, the in situ large-scale PRACLAY heater test was started, aiming at studying the THM behaviour of the clay in the near field, i.e. within the excavation damaged zone, and in the far-field of a heated gallery. An extensive monitoring network installed around the PRACLAY gallery allows to observe the evolution of temperature and pore water pressure in the Boom Clay. In this paper, the first observations that have been made since the start of the PRACLAY heater test are reported. These observations generally confirm the knowledge gained previously from experiments performed at smaller scales. The PRACLAY heater test provides a realistic estimate of what the thermal pressurisation of the Boom Clay would be around a geological disposal facility.

KW - Boom clay

KW - Radioactive waste

KW - Heater test

KW - Thermo-hydro-mechanical behaviour

KW - Large-scale test

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/43920820

U2 - 10.1016/j.ijrmms.2020.104558

DO - 10.1016/j.ijrmms.2020.104558

M3 - Article

VL - 137

SP - 1

EP - 16

JO - International Journal of Rock Mechanics & Mining Sciences

JF - International Journal of Rock Mechanics & Mining Sciences

SN - 1365-1609

M1 - 104558

ER -

ID: 7129481