Comparative modelling of the coupled thermal-hydraulic-mechanical (THM) processes in a heated bentonite pellet column with hydration

doi:10.1007/s12665-018-7255-3

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	Comparative modelling of the coupled thermal-hydraulic-mechanical (THM) processes in a heated bentonite pellet column with hydration
	Shao, H.12; Graupner, B. J.13; Wang, X. R.12; Nguyen, T. S.11; Li, Z.11; Rutqvist, J.10; Chen, F.10; Birkholzer, J.10; Wang, W.9; Manepally, C.1
刊名	ENVIRONMENTAL EARTH SCIENCES
	2018
卷号	77 期号:3 页码:-
关键词	Mont Terri Clay rock Bentonite Heater experiment Coupled THM processes
ISSN号	1866-6280
DOI	10.1007/s12665-018-7255-3
英文摘要	For the deep geological disposal of high-level radioactive waste in argillaceous rocks, the heat production of the waste is an important driver for thermal-hydraulic-mechanical (THM)-coupled processes. These THM processes influence the properties and conditions of the near field that in many repository designs contains bentonite as a clay buffer. One task in the DECOVALEX-2015 (DEvelopment of COupled models and their VALidation against Experiments) project was the modelling of a heated bentonite column (Villar et al. in Long-term THM tests reports: THM cells for the HE-E test: update of results until February 2014. Deliverable-no: D2.2-7.3. CIEMAT Technical Report IEMAT/DMA/2G210/03/2014, 2014) in preparation for the in situ heater experiment HE-E at the underground rock laboratory Mont Terri. DECOVALEX is an international cooperative project that focuses on the development and validation of mathematical models for simulating such coupled processes associated with disposal in deep geological repositories. Eight modelling teams developed their own THM-coupled models for the bentonite column experiment, using six different simulation codes. Each of the teams individually calibrated the THM parameters for the bentonite material. The eight resulting parameter sets agree well and allow a satisfactory reproduction of the TH measurements by all models. The modelling results for the evolution of temperature and relative humidity over time at three sensors in the bentonite column are in good agreement between the teams and with the measured data. Also, changes of the temperature due to modifications of the insulation and the adjustment of the heating power during the course of the experiment are well reproduced. The models were thus able to reproduce the main physical processes of the experiment, both for vapour-dominated diffusion during the heating phase and combined liquid and vapour transport during a subsequent heating and hydration phase. Based on the parameter sets, the teams predict a penetration of the water infiltration front in the 48-cm column filled with bentonite pellets to a depth between 25 and 35 cm over the 15,000 h (i.e. over 20 months) of the hydration phase of the experiment.
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000424871000032
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4215]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.CNWRA, Rockville; 2.Natl Cooperat Disposal Radioact Waste NAGRA, Wettingen, Switzerland 3.Univ Kiel, Inst Geosci, Kiel, Germany; 4.Inst Radiol Protect & Nucl Safety IRSN; 5.NRC, Rockville, MD USA; 6.JAEA, Tokyo, Japan; 7.KAERI; 8.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 9.UFZ Helmholtz Ctr Environm Res; 10.LBNL, Berkeley, CA USA;
推荐引用方式 GB/T 7714	Shao, H.,Graupner, B. J.,Wang, X. R.,et al. Comparative modelling of the coupled thermal-hydraulic-mechanical (THM) processes in a heated bentonite pellet column with hydration[J]. ENVIRONMENTAL EARTH SCIENCES,2018,77(3):-.
APA	Shao, H..,Graupner, B. J..,Wang, X. R..,Nguyen, T. S..,Li, Z..,...&Dasgupta, B..(2018).Comparative modelling of the coupled thermal-hydraulic-mechanical (THM) processes in a heated bentonite pellet column with hydration.ENVIRONMENTAL EARTH SCIENCES,77(3),-.
MLA	Shao, H.,et al."Comparative modelling of the coupled thermal-hydraulic-mechanical (THM) processes in a heated bentonite pellet column with hydration".ENVIRONMENTAL EARTH SCIENCES 77.3(2018):-.