TY - GEN
T1 - Numerical and Experimental Study of the Praclay Seal Test in URL, Mol
AU - Chen, Guangjing
AU - Gatabin, Claude
AU - Li, Xiang Ling
N1 - Score = 3
PY - 2012/12
Y1 - 2012/12
N2 - In the frame of in-situ PRACLAY Heater experiment to be performed in HADES URL in Mol, an annular seal composed of compacted bentonite MX 80 will be installed to study the feasibility of a horizontal gallery seal (PRACLAY seal test). Scoping calculation based on finite element code was performed to investigate the THM behaviour of the seal, based on which, decisions are made on the initial dry density of the bentonite blocks, the initial technological void in the seal, the duration and pressure of water injection through the filters. It is also found that unlocking the steel rings, which are pre-installed for the sake of security of the gallery, is necessary when the bentonite is put in place to ensure more homogeneous swelling pressure build-up in the seal. Besides, several laboratory experiments have also been performed on the same kind of bentonite with the same properties to investigate the effect of the technology voids on the swelling pressure build-up.
AB - In the frame of in-situ PRACLAY Heater experiment to be performed in HADES URL in Mol, an annular seal composed of compacted bentonite MX 80 will be installed to study the feasibility of a horizontal gallery seal (PRACLAY seal test). Scoping calculation based on finite element code was performed to investigate the THM behaviour of the seal, based on which, decisions are made on the initial dry density of the bentonite blocks, the initial technological void in the seal, the duration and pressure of water injection through the filters. It is also found that unlocking the steel rings, which are pre-installed for the sake of security of the gallery, is necessary when the bentonite is put in place to ensure more homogeneous swelling pressure build-up in the seal. Besides, several laboratory experiments have also been performed on the same kind of bentonite with the same properties to investigate the effect of the technology voids on the swelling pressure build-up.
KW - Seal
KW - THM modelling
KW - MX80 bentonite
KW - swelling pressure
KW - experimental study
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_127058
UR - http://knowledgecentre.sckcen.be/so2/bibref/9967
M3 - In-proceedings paper
T3 - EUR report
SP - 367
EP - 372
BT - Impact of thermo-hydro-mechanical chemical (THMC) processes on the safety of underground radioactive waste repositories. Proceedings of the European Commission TIMODAZ-THERESA International Conference, Luxembourg, 29 September – 1 October 2009
CY - Brussels, Belgium
T2 - TIMODAZ-THERESA International Conference
Y2 - 29 September 2009 through 1 October 2009
ER -