Jacques Delay - Academia.edu (original) (raw)
Papers by Jacques Delay
Lecture Notes in Earth Sciences, 2004
ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an electromagnetic ... more ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an electromagnetic permanent gauge (EPG) for long term monitoring of pore pressures in low permeability Callovo-Oxfordian argillites. The EPG is a pressure gauge that is permanently cemented into a borehole with no wire or tubing connections. The EPG transmits its data electromagnetically through the rock. Improvements in batteries have
Lecture Notes in Earth Sciences, 2004
ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an integrated appro... more ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an integrated approach to characterizing the hydrogeology of the carbonate strata that encase the Callovo-Oxfordian argillite at the Meuse/Haute-Marne Laboratory site. The argillites are difficult to characterize due to their low permeability. The barrier properties of the argillites can be inferred from the flow and chemistry properties of the encasing Oxfordian and Dogger carbonates. Andra's deep hole approach uses reverse air circulation drilling, geophysical logging, flow meter logging, geochemical sampling, and analyses of the pumping responses during sampling. The data support numerical simulations that evaluate the argillite's hydraulic behaviour.
Physics and Chemistry of the Earth, Parts A/B/C, 2007
Andra (Agence Nationale pour la Gestion des Déchets Radioactifs -National Radioactive Waste Manag... more Andra (Agence Nationale pour la Gestion des Déchets Radioactifs -National Radioactive Waste Management Agency) has developed specific tools and methodologies to evaluate and understand the main transport mechanisms of solute species in an argillaceous rock in the framework of the scientific program of the Meuse/Haute-Marne Underground Research Laboratory.
Hydraulic testing in packer-isolated wellbore intervals in low-permeability formations is often c... more Hydraulic testing in packer-isolated wellbore intervals in low-permeability formations is often complicated by non-ideal conditions such as thermal expansion of fluid in the test interval, packer squeeze and borehole closure. Such processes lead to fluid accumulation and pressurization within the wellbore during shut-in, and can exert significant effects on the measured borehole pressure response. Unless these conditions are taken into account during test interpretation, it is possible to make inappropriate conclusions regarding formation heterogeneity (e.g., lateral permeability variations) and/or static pressure levels. We have developed a lumped parameter modeling approach by treating the combined effect of these processes as the equivalent of an additional volume of fluid accumulating within the test interval (in addition to the nominal test-interval volume at the time of shut-in). We postulate that the rate of fluid accumulation can be treated in a simple manner as a constant v...
i-DUST 2010, 2011
The Meuse/Haute-Marne Underground Research Laboratory (URL) is the main installation of the Meuse... more The Meuse/Haute-Marne Underground Research Laboratory (URL) is the main installation of the Meuse/Haute-Marne Center. Its research program is dedicated to preparing the construction and operation of a deep geological disposal facility for high-level and intermediate-level long-lived radioactive waste (HL, IL-LLW). The URL consists of two shafts giving access to the drift networks where the physical and chemical containment properties of a 160-million-year old clay layer are under study. This paper presents technologies and techniques implemented in the framework of the gas flow and thermal properties experiments carried out on the Callovo-Oxfordian argillaceous rock formation. Since gases will be produced by the deterioration of the disposal components (packages, packaging components, metallic construction material), knowledge of their production and migration mechanisms in the rock formation (PGZ experiment) are of particular significance for the operation safety and, in the long term, for the safety of the installation itself. In addition, some heat generating packages will entail significant evolutions of the natural constraints at close-and long-range from the packages. Knowledge of the thermo-hydro-mechanical behaviour of the rock formation (TED experiment) is supporting the architecture design of the underground installations and their developments in the course of operation. a
Bulletin de la Societe Geologique de France, 2013
EPJ Web of Conferences, 2010
Andra is in charge of studying the feasibility of a disposal facility for longlived high-level nu... more Andra is in charge of studying the feasibility of a disposal facility for longlived high-level nuclear waste (LL-HLW) in a deep geological environment. With this aim, dedicated experiments have been carried out for several years at the Meuse/Haute Marne Underground Research Laboratory excavated in a 500 m deep argillaceous rock formation. These experiments include determining the feasibility of the excavation of disposal cells for LL-HLW, consisting of 40 meter long, 70 cm in diameter, horizontal cased micro tunnels. The hydro mechanical impact of the excavation of such openings on the rock mass behaviour is continuously monitored as well as their mean term mechanical behaviour. Since LL-HLW produce heat, the impact of temperature on the surrounding rock mass and on the micro tunnel steel casing will also be studied. Specific instrumentation has been developed to study this impact. The first step of the microtunnel excavation tests, carried out in 2009, has led to improving the excavation method and the drilling machine. These improvements will be tested in the next step of the excavation tests planned for 2010. The THM experiment dedicated to studying the behaviour of the rock mass under thermal solicitation started early 2010. The behaviour of a steel casing in contact with the rock mass and under thermal solicitation will be studied in an experiment scheduled to start in September 2010.
Volume 4: Radiation Protection and Nuclear Technology Applications; Fuel Cycle, Radioactive Waste Management and Decommissioning; Computational Fluid Dynamics (CFD) and Coupled Codes; Reactor Physics and Transport Theory, 2014
Comptes Rendus Geoscience, 2006
Since 1994, Andra has carried out a series of research programs in order to determine the hydroge... more Since 1994, Andra has carried out a series of research programs in order to determine the hydrogeological properties, including permeability, of the Callovo-Oxfordian argillaceous formation of the Paris Basin, and more specifically of the site of the underground laboratory located on the township of Bure, in the South of the Meuse district. Determining such a parameter in a very low
Physics and Chemistry of the Earth, Parts A/B/C, 2007
In November 1999 Andra began building an Underground Research Laboratory (URL) on the border of t... more In November 1999 Andra began building an Underground Research Laboratory (URL) on the border of the Meuse and Haute-Marne departments in eastern France. The research activities of the URL are dedicated to study the feasibility of reversible, deep geological disposal of high-activity, long-lived radioactive wastes in an argillaceous host rock. The Laboratory consists of two shafts, an experimental drift at 445 m depth and a set of technical and experimental drifts at the main level at 490 m depth.
Physics and Chemistry of the Earth, Parts A/B/C, 2007
Andra, the French National Radioactive Waste Management Agency, is constructing an underground te... more Andra, the French National Radioactive Waste Management Agency, is constructing an underground test facility to study the feasibility of a radioactive waste disposal in the Jurassic-age Callovo-Oxfordian argillites. This paper describes the processes, the methods and results of a scientific characterization program carried out from the surface via deep boreholes with the aim to build a research facility for radioactive waste disposal. In particular this paper shows the evolution of the drilling programs and the borehole set up due to the refinement of the scientific objectives from 1994 to 2004. The pre-investigation phase on the Meuse/Haute-Marne site started in 1994. It consisted in drilling seven scientific boreholes. This phase, completed in 1996, led to the first regional geological cross-section showing the main geometrical characteristics of the host rock.
Physics and Chemistry of the Earth, Parts A/B/C, 2011
Within its scientific program devoted to the feasibility of a high level radioactive waste facili... more Within its scientific program devoted to the feasibility of a high level radioactive waste facility in the Callovo-Oxfordian argillaceous rock (COx) of the eastern Paris Basin, Andra has conducted an extensive characterization of the Oxfordian and Dogger limestone formations above and below the COx. More than 25 wells were dedicated to the hydrogeological and geochemical characterization of the Oxfordian and Dogger limestones over a 400 km 2 sector. An original strategy was developed to obtain field hydrogeological measurements and representative formation water samples in these wells. An extensive 3D set of field data and water compositions were obtained over 15 years. The geochemical and isotopic data indicate a meteoric origin for the Oxfordian and Dogger limestone waters. The geological observations revealed a clay rich level horizontally dividing the Oxfordian limestones into two parts in the NE zone of the study area. In the lower Oxfordian, water inflows come mainly from the outcrop in the southeastern part of the study area. Three meteoric water inflows were identified in the upper Oxfordian in the study area: the first one covers the eastern and southeastern part of the area, the second one covers the diffuse fracturation zone (DFZ) south of the area, and the third one is located in the north eastern part of the area. The two first inflows consist of fresh water, while the last one consists of Mg 2+ ,SO 2À 4 and Na + rich waters coming from the erosion of the Purbeckian lithological type facies. Fresh waters from the outcrops flow slowly towards the North West. They equilibrate with the limestone dolomite formations and are enriched by a Na + and Cl À diffusive flux coming from the Dogger through the Callovo-Oxfordian argillaceous rock. These waters mix with the water coming from the North East upper Oxfordian. The Dogger limestone is characterized by sodium chloride groundwaters with higher salinity values than the Oxfordian limestone. North-northwest flows in the Dogger limestone are slower than flows in the Oxfordian formation. In both formations, the DFZ must be considered to be an apart hydrological system.
Proceedings of TOUGH …, 2006
... Rainer Senger1, Cristian Enachescu2, Thomas Doe3, Marc Distinguin4, Jacques Delay4, Bernd Fri... more ... Rainer Senger1, Cristian Enachescu2, Thomas Doe3, Marc Distinguin4, Jacques Delay4, Bernd Frieg5 1 INTERA Incorporated, 9111A Research Blvd ... The GTPT was designed and subsequently analyzed using the two phase flow code TOUGH2 (Pruess, 1991) and iTOUGH2 ...
Physics and Chemistry of the Earth, Parts A/B/C, 2008
In studies related to deep geological disposal of radioactive waste, it is current practice to tr... more In studies related to deep geological disposal of radioactive waste, it is current practice to transfer external information (e.g. from other sites, from underground rock laboratories or from natural analogues) to safety cases for specific projects. Transferable information most commonly includes parameters, investigation techniques, process understanding, conceptual models and high-level conclusions on system behaviour. Prior to transfer, the basis of transferability needs to be established. In argillaceous rocks, the most relevant common feature is the microstructure of the rocks, essentially determined by the properties of clay-minerals. Examples are shown from the Swiss and French programmes how transfer of information was handled and justified. These examples illustrate how transferability depends on the stage of development of a repository safety case and highlight the need for adequate system understanding at all sites involved to support the transfer. (M. Mazurek). 1 A safety case is a collection of arguments, at a given stage of repository development, in support of the long-term safety of the repository. It comprises the findings of a safety assessment and a statement of confidence in these findings. It should acknowledge the existence of any unresolved issues and provide guidance for work to resolve these issues in future development stages. A safety case is the end product of a safety assessment.
Lecture Notes in Earth Sciences, 2004
ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an electromagnetic ... more ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an electromagnetic permanent gauge (EPG) for long term monitoring of pore pressures in low permeability Callovo-Oxfordian argillites. The EPG is a pressure gauge that is permanently cemented into a borehole with no wire or tubing connections. The EPG transmits its data electromagnetically through the rock. Improvements in batteries have
Lecture Notes in Earth Sciences, 2004
ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an integrated appro... more ANDRA (Agence Nationale pour la Gestion de Déchets Radioactifs) has developed an integrated approach to characterizing the hydrogeology of the carbonate strata that encase the Callovo-Oxfordian argillite at the Meuse/Haute-Marne Laboratory site. The argillites are difficult to characterize due to their low permeability. The barrier properties of the argillites can be inferred from the flow and chemistry properties of the encasing Oxfordian and Dogger carbonates. Andra's deep hole approach uses reverse air circulation drilling, geophysical logging, flow meter logging, geochemical sampling, and analyses of the pumping responses during sampling. The data support numerical simulations that evaluate the argillite's hydraulic behaviour.
Physics and Chemistry of the Earth, Parts A/B/C, 2007
Andra (Agence Nationale pour la Gestion des Déchets Radioactifs -National Radioactive Waste Manag... more Andra (Agence Nationale pour la Gestion des Déchets Radioactifs -National Radioactive Waste Management Agency) has developed specific tools and methodologies to evaluate and understand the main transport mechanisms of solute species in an argillaceous rock in the framework of the scientific program of the Meuse/Haute-Marne Underground Research Laboratory.
Hydraulic testing in packer-isolated wellbore intervals in low-permeability formations is often c... more Hydraulic testing in packer-isolated wellbore intervals in low-permeability formations is often complicated by non-ideal conditions such as thermal expansion of fluid in the test interval, packer squeeze and borehole closure. Such processes lead to fluid accumulation and pressurization within the wellbore during shut-in, and can exert significant effects on the measured borehole pressure response. Unless these conditions are taken into account during test interpretation, it is possible to make inappropriate conclusions regarding formation heterogeneity (e.g., lateral permeability variations) and/or static pressure levels. We have developed a lumped parameter modeling approach by treating the combined effect of these processes as the equivalent of an additional volume of fluid accumulating within the test interval (in addition to the nominal test-interval volume at the time of shut-in). We postulate that the rate of fluid accumulation can be treated in a simple manner as a constant v...
i-DUST 2010, 2011
The Meuse/Haute-Marne Underground Research Laboratory (URL) is the main installation of the Meuse... more The Meuse/Haute-Marne Underground Research Laboratory (URL) is the main installation of the Meuse/Haute-Marne Center. Its research program is dedicated to preparing the construction and operation of a deep geological disposal facility for high-level and intermediate-level long-lived radioactive waste (HL, IL-LLW). The URL consists of two shafts giving access to the drift networks where the physical and chemical containment properties of a 160-million-year old clay layer are under study. This paper presents technologies and techniques implemented in the framework of the gas flow and thermal properties experiments carried out on the Callovo-Oxfordian argillaceous rock formation. Since gases will be produced by the deterioration of the disposal components (packages, packaging components, metallic construction material), knowledge of their production and migration mechanisms in the rock formation (PGZ experiment) are of particular significance for the operation safety and, in the long term, for the safety of the installation itself. In addition, some heat generating packages will entail significant evolutions of the natural constraints at close-and long-range from the packages. Knowledge of the thermo-hydro-mechanical behaviour of the rock formation (TED experiment) is supporting the architecture design of the underground installations and their developments in the course of operation. a
Bulletin de la Societe Geologique de France, 2013
EPJ Web of Conferences, 2010
Andra is in charge of studying the feasibility of a disposal facility for longlived high-level nu... more Andra is in charge of studying the feasibility of a disposal facility for longlived high-level nuclear waste (LL-HLW) in a deep geological environment. With this aim, dedicated experiments have been carried out for several years at the Meuse/Haute Marne Underground Research Laboratory excavated in a 500 m deep argillaceous rock formation. These experiments include determining the feasibility of the excavation of disposal cells for LL-HLW, consisting of 40 meter long, 70 cm in diameter, horizontal cased micro tunnels. The hydro mechanical impact of the excavation of such openings on the rock mass behaviour is continuously monitored as well as their mean term mechanical behaviour. Since LL-HLW produce heat, the impact of temperature on the surrounding rock mass and on the micro tunnel steel casing will also be studied. Specific instrumentation has been developed to study this impact. The first step of the microtunnel excavation tests, carried out in 2009, has led to improving the excavation method and the drilling machine. These improvements will be tested in the next step of the excavation tests planned for 2010. The THM experiment dedicated to studying the behaviour of the rock mass under thermal solicitation started early 2010. The behaviour of a steel casing in contact with the rock mass and under thermal solicitation will be studied in an experiment scheduled to start in September 2010.
Volume 4: Radiation Protection and Nuclear Technology Applications; Fuel Cycle, Radioactive Waste Management and Decommissioning; Computational Fluid Dynamics (CFD) and Coupled Codes; Reactor Physics and Transport Theory, 2014
Comptes Rendus Geoscience, 2006
Since 1994, Andra has carried out a series of research programs in order to determine the hydroge... more Since 1994, Andra has carried out a series of research programs in order to determine the hydrogeological properties, including permeability, of the Callovo-Oxfordian argillaceous formation of the Paris Basin, and more specifically of the site of the underground laboratory located on the township of Bure, in the South of the Meuse district. Determining such a parameter in a very low
Physics and Chemistry of the Earth, Parts A/B/C, 2007
In November 1999 Andra began building an Underground Research Laboratory (URL) on the border of t... more In November 1999 Andra began building an Underground Research Laboratory (URL) on the border of the Meuse and Haute-Marne departments in eastern France. The research activities of the URL are dedicated to study the feasibility of reversible, deep geological disposal of high-activity, long-lived radioactive wastes in an argillaceous host rock. The Laboratory consists of two shafts, an experimental drift at 445 m depth and a set of technical and experimental drifts at the main level at 490 m depth.
Physics and Chemistry of the Earth, Parts A/B/C, 2007
Andra, the French National Radioactive Waste Management Agency, is constructing an underground te... more Andra, the French National Radioactive Waste Management Agency, is constructing an underground test facility to study the feasibility of a radioactive waste disposal in the Jurassic-age Callovo-Oxfordian argillites. This paper describes the processes, the methods and results of a scientific characterization program carried out from the surface via deep boreholes with the aim to build a research facility for radioactive waste disposal. In particular this paper shows the evolution of the drilling programs and the borehole set up due to the refinement of the scientific objectives from 1994 to 2004. The pre-investigation phase on the Meuse/Haute-Marne site started in 1994. It consisted in drilling seven scientific boreholes. This phase, completed in 1996, led to the first regional geological cross-section showing the main geometrical characteristics of the host rock.
Physics and Chemistry of the Earth, Parts A/B/C, 2011
Within its scientific program devoted to the feasibility of a high level radioactive waste facili... more Within its scientific program devoted to the feasibility of a high level radioactive waste facility in the Callovo-Oxfordian argillaceous rock (COx) of the eastern Paris Basin, Andra has conducted an extensive characterization of the Oxfordian and Dogger limestone formations above and below the COx. More than 25 wells were dedicated to the hydrogeological and geochemical characterization of the Oxfordian and Dogger limestones over a 400 km 2 sector. An original strategy was developed to obtain field hydrogeological measurements and representative formation water samples in these wells. An extensive 3D set of field data and water compositions were obtained over 15 years. The geochemical and isotopic data indicate a meteoric origin for the Oxfordian and Dogger limestone waters. The geological observations revealed a clay rich level horizontally dividing the Oxfordian limestones into two parts in the NE zone of the study area. In the lower Oxfordian, water inflows come mainly from the outcrop in the southeastern part of the study area. Three meteoric water inflows were identified in the upper Oxfordian in the study area: the first one covers the eastern and southeastern part of the area, the second one covers the diffuse fracturation zone (DFZ) south of the area, and the third one is located in the north eastern part of the area. The two first inflows consist of fresh water, while the last one consists of Mg 2+ ,SO 2À 4 and Na + rich waters coming from the erosion of the Purbeckian lithological type facies. Fresh waters from the outcrops flow slowly towards the North West. They equilibrate with the limestone dolomite formations and are enriched by a Na + and Cl À diffusive flux coming from the Dogger through the Callovo-Oxfordian argillaceous rock. These waters mix with the water coming from the North East upper Oxfordian. The Dogger limestone is characterized by sodium chloride groundwaters with higher salinity values than the Oxfordian limestone. North-northwest flows in the Dogger limestone are slower than flows in the Oxfordian formation. In both formations, the DFZ must be considered to be an apart hydrological system.
Proceedings of TOUGH …, 2006
... Rainer Senger1, Cristian Enachescu2, Thomas Doe3, Marc Distinguin4, Jacques Delay4, Bernd Fri... more ... Rainer Senger1, Cristian Enachescu2, Thomas Doe3, Marc Distinguin4, Jacques Delay4, Bernd Frieg5 1 INTERA Incorporated, 9111A Research Blvd ... The GTPT was designed and subsequently analyzed using the two phase flow code TOUGH2 (Pruess, 1991) and iTOUGH2 ...
Physics and Chemistry of the Earth, Parts A/B/C, 2008
In studies related to deep geological disposal of radioactive waste, it is current practice to tr... more In studies related to deep geological disposal of radioactive waste, it is current practice to transfer external information (e.g. from other sites, from underground rock laboratories or from natural analogues) to safety cases for specific projects. Transferable information most commonly includes parameters, investigation techniques, process understanding, conceptual models and high-level conclusions on system behaviour. Prior to transfer, the basis of transferability needs to be established. In argillaceous rocks, the most relevant common feature is the microstructure of the rocks, essentially determined by the properties of clay-minerals. Examples are shown from the Swiss and French programmes how transfer of information was handled and justified. These examples illustrate how transferability depends on the stage of development of a repository safety case and highlight the need for adequate system understanding at all sites involved to support the transfer. (M. Mazurek). 1 A safety case is a collection of arguments, at a given stage of repository development, in support of the long-term safety of the repository. It comprises the findings of a safety assessment and a statement of confidence in these findings. It should acknowledge the existence of any unresolved issues and provide guidance for work to resolve these issues in future development stages. A safety case is the end product of a safety assessment.