Modelling an in-situ ventilation test in the Andra Underground Research Facilities
Wastes resulting from the nuclear electricity production have to be isolated from the biosphere for a very long period of time. For this purpose, deep underground repository in weak permeable geological layers is considered as a reliable solution for the nuclear waste storage. It is however well est...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
EDP Sciences
2016-01-01
|
Series: | E3S Web of Conferences |
Online Access: | http://dx.doi.org/10.1051/e3sconf/20160904003 |
id |
doaj-1d78222bb5a8414595d742dca1d62b56 |
---|---|
record_format |
Article |
spelling |
doaj-1d78222bb5a8414595d742dca1d62b562021-02-02T07:24:31ZengEDP SciencesE3S Web of Conferences2267-12422016-01-0190400310.1051/e3sconf/20160904003e3sconf_eunsat2016_04003Modelling an in-situ ventilation test in the Andra Underground Research FacilitiesCollin Frédéric0Talandier Jean1Pardoen Benoit2University of Liège, ArGEnCo DepartmentAndra, Research and Development DivisionUniversité Laval, Département de Génie Civil et de Génie des EauxWastes resulting from the nuclear electricity production have to be isolated from the biosphere for a very long period of time. For this purpose, deep underground repository in weak permeable geological layers is considered as a reliable solution for the nuclear waste storage. It is however well established that during excavation, the underground drilling process engenders cracks and eventually fractures [1] that deteriorate the hydro-mechanical properties of the surrounding host material in the so-called Excavation Damaged Zone (EDZ). The EDZ behaviour is a major issue because it may constitute a preferential flow path for radionuclide migration. Consequently, the characterisation of the material transport properties and of the transfer kinetics that occur around galleries still need to be investigated. The EDZ properties may be also affected by host rock-gallery air interactions. Ventilation induced drying may also provoke additional cracking, which potentially alters the transport properties of the damaged zone. Large-scale air ventilation experiments are performed in Underground Research Laboratories (URL) that have been constructed to check the feasibility of the repository. A numerical modelling of the SDZ air ventilation test (Andra URL) performed in a low permeability rock is proposed in order to both predict the development of the EDZ during excavation and study the air interaction with the host formation during maintenance phases.http://dx.doi.org/10.1051/e3sconf/20160904003 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Collin Frédéric Talandier Jean Pardoen Benoit |
spellingShingle |
Collin Frédéric Talandier Jean Pardoen Benoit Modelling an in-situ ventilation test in the Andra Underground Research Facilities E3S Web of Conferences |
author_facet |
Collin Frédéric Talandier Jean Pardoen Benoit |
author_sort |
Collin Frédéric |
title |
Modelling an in-situ ventilation test in the Andra Underground Research Facilities |
title_short |
Modelling an in-situ ventilation test in the Andra Underground Research Facilities |
title_full |
Modelling an in-situ ventilation test in the Andra Underground Research Facilities |
title_fullStr |
Modelling an in-situ ventilation test in the Andra Underground Research Facilities |
title_full_unstemmed |
Modelling an in-situ ventilation test in the Andra Underground Research Facilities |
title_sort |
modelling an in-situ ventilation test in the andra underground research facilities |
publisher |
EDP Sciences |
series |
E3S Web of Conferences |
issn |
2267-1242 |
publishDate |
2016-01-01 |
description |
Wastes resulting from the nuclear electricity production have to be isolated from the biosphere for a very long period of time. For this purpose, deep underground repository in weak permeable geological layers is considered as a reliable solution for the nuclear waste storage. It is however well established that during excavation, the underground drilling process engenders cracks and eventually fractures [1] that deteriorate the hydro-mechanical properties of the surrounding host material in the so-called Excavation Damaged Zone (EDZ). The EDZ behaviour is a major issue because it may constitute a preferential flow path for radionuclide migration. Consequently, the characterisation of the material transport properties and of the transfer kinetics that occur around galleries still need to be investigated. The EDZ properties may be also affected by host rock-gallery air interactions. Ventilation induced drying may also provoke additional cracking, which potentially alters the transport properties of the damaged zone. Large-scale air ventilation experiments are performed in Underground Research Laboratories (URL) that have been constructed to check the feasibility of the repository. A numerical modelling of the SDZ air ventilation test (Andra URL) performed in a low permeability rock is proposed in order to both predict the development of the EDZ during excavation and study the air interaction with the host formation during maintenance phases. |
url |
http://dx.doi.org/10.1051/e3sconf/20160904003 |
work_keys_str_mv |
AT collinfrederic modellinganinsituventilationtestintheandraundergroundresearchfacilities AT talandierjean modellinganinsituventilationtestintheandraundergroundresearchfacilities AT pardoenbenoit modellinganinsituventilationtestintheandraundergroundresearchfacilities |
_version_ |
1724299533329891328 |