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From Research to Operational Tools: elements of strategy to valorize the results of GNR MoMaS. Andra - Laurent LOTH. Summary. Numerical Simulation at Andra The radwaste repository projects and their milestones First feedback of the tools used up to now by Andra - PowerPoint PPT Presentation
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AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra
Andra - Laurent LOTH
From Research to Operational Tools: elements of strategy to valorize the
results of GNR MoMaS
November 23th of 2009
C.TR.AEAP.09.0091
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Summary
Numerical Simulation at AndraThe radwaste repository projects and their milestonesFirst feedback of the tools used up to now by AndraConsequences for development requests
The GNR MoMaSGoalsResultsQuestions
ProposalsScientific themesExpected results
23 novembre 2009C.TR.AEAP.09.00912
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra
Numerical Simulation at Andra
23 novembre 2009C.TR.AEAP.09.00913
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Simulation for the repositories (1/2)
23 novembre 2009C.TR.AEAP.09.0091
Numerical Simulation: an adequate tool for
Ap
plicati
on
Fie
lds
Phenomenological evolution modelling
(PARS)
Design & Conception
Performance/Safety Analysis
the dimensioning and interpretation of experiments,
in particular at the Underground Laboratory
Centre Meuse/Haute Marne / projet HA-MAVLHigh-Level and intermediate-level long-lived radwaste
Deep geological reversible repository
Cen
ters
/Pro
jects
5
Recherches sur le stockage gRecherches sur le stockage gééologiqueologique
• Connaissance des déchets et des matériaux
• Connaissance du milieu géologique
• Définition des architectures de stockage
• Développement d’outils de modélisation et de simulation
L’ensemble débouche sur une évaluation de sûreté
• Etudier la possibilité de construire, exploiter, gérer de manière réversible un stockage, en assurant la protection des personnes et de l’environnement.
• 2 milieux étudiés : argile et le granite
Projet FAVL(Low-level and long lived radwaste)
(Radifer - Graphite)Surface and low-depth repository
Centre de surface(Low and very low-level radwaste)
CSFMA, CSTFAcentre Manche
the modelling of elementary
mechanisms at the various scales
4
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Simulation for the repositories (2/2)
Simulation of elementary mechanisms
Apprehend physical processes at very-small scales (nano, meso, micro) et transition to macro-scale
Understanding of « mechanical » interactions solid/solid/fluid
Transfer of fluid or gas in a porale structure ...
→ Work performed within research laboratories→ Numerical Problems centered on ab-initio, molecular modelling, …
Simulation of repository
Represent end Quantify the THMCR phenomenological evolution of components (waste, package, cell, galleries, geological media, …) at the repository time scales
Chemical deterioration of concrete
2 phase-flow with production and migration of gas in the repository,
Release of RN out of the waste packages and migration through the repository structures and geological media,…
Performance and safety assessment of the repository : performance and dose indicators→ Work performed within Andra and by its partners or engineering companies→ Numerical Problems centered on numerical methods : discretization, solver, meshing, ..
23 novembre 2009C.TR.AEAP.09.00915
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
The main milestones of Andra until 2014 (1/2)
23 novembre 2009C.TR.AEAP.09.0091
2009 2010 2011 2012 2013 2014
HAVL
FAVL ?
Centre Aube
Choose of design options DACAPS Selectionof the site
Centre Manche
APSS / Phenomenologiy phenomenological simulations
Preliminary calculations
Safety evaluation
Calculations / Simulations / Feasability studiesPreliminary calculations
Safety evaluation
Selection of the site DAC
Program will be defined after the evaluationCalculations
Safety report
Preliminary calculations/ Safety evaluationHydraulic model review and
characterization
Safety report
Tools stabilized version for the years 2012-2014
6
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
The main milestones of Andra until 2014 (2/2)
Strong time schedule for all Andra’s ProjectsSo, it’s necessary to dispose of robust and efficient tools, able to take into account the complexity of processes and geometries but focused on our main applications.
Tools current features and foreseen developments :Starting from existing and broadly used tools
Possibility to increase the capabilities in physical and numerical functionalities,
Possibility to couple tools easily
Some assessmentsAndra must answer to the questions from the different regulators (Scientific Council, CNE, safety authority, …)
A keypoint : the time/space understanding of physical processes in each part of the system (PARS)
Numerical simulation major tool to fullfill objectives
23 novembre 2009C.TR.AEAP.09.00917
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
First feedback of the tools used as of today by Andra (1/4)
23 novembre 2009C.TR.AEAP.09.0091
Since 2005, progress in terms of methods and tools, related to:
Hydraulic and solute transfer2 phase-flow with production and migration of gasChemical transferSensitivity and uncertainty analysis
A decisive step in computation performance:Progressive implementation of high performance computing
Capacity to model the whole repository
Methods and tools are about to fulfill targeted requests for DAC
8
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Flow and solute transfer through the repository structures (whole repository design) and the COX (Porflow)
Sensitivity and uncertainty analysisUse of metamodel built by neural network method (cf. presentation of G. Pépin and J. M. Martinez)
First feedback of the tools used as of today by Andra (2/4)
23 novembre 2009C.TR.AEAP.09.0091
X
Y
0 1000 2000 3000 4000 5000 60000
1000
2000
3000
4000
5000
6000
P
320315310305300295290285280275270265260255250245240
Champ de concentration en I129 à 90.000 ansChamp de charge hydraulique
Maillage représentant toutes les zones et tous les composants du stockage: environ 10 millions de mailles
9
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Two-phase flow and gaz transfer through the repository (Tough2_MP)
First feedback of the tools used as of today by Andra (3/4)
23 novembre 2009C.TR.AEAP.09.00911010
ILLW disposal zone
Access zone
Gas
pre
ssur
e (B
ars)
HLW disposal zone
Schematic of a generic plan view of a part of the repository, with indication of zones and sectors
Schematic of the methodology: Spatial subdivision into zones and sectors, multiplication and connection
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
First feedback of the tools used as of today by Andra (4/4)
Carbonatation and dissolution of the portlandite of the package and work concretes (Tough-React)
Cf. presentation of B. Cochepin
23 novembre 200911 C.TR.AEAP.09.0091
Argilites
Matériau cimentaire(revêtement/conteneur)
Air (O2, CO2…)
Conteneur primaire
Déchets
Argilites partiellement désaturées
Limite de la carbonatation atmos-phérique des matériaux cimentaires
O2
Limite de désaturation, limite de l’oxydation partielle de la pyrite et de la MO
Eau quasi-pureissue des argiles
Limite de la dégradation des matériaux
cimentaires
Limite de la corrosion du fût primaire
Eau cimentaire saine
Dégradationdes déchets
CO2CO2
Corrosion à l’état passif des armatures des colis de stockage
X(m)
Po
rtla
nd
ite(f
ract
ion
volu
miq
ue
)
Ca
lcite
(fra
ctio
nvo
lum
iqu
e)
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 60.05
0.055
0.06
0.065
0.07
0.6
0.605
0.61
0.615
0.62
0.625
0.63
0.635
0.64
0.645
0.65BEREMCOL BECOL ARF
Frame 001 15 Jan 2009
Portlandite à t=0
Portlandite à t=1500 ans
Calcite à t=0
Calcite à t=1500 ans
Portlandite à t=100 ans
épaisseur de dissolution de la portlandite du colis de
stockage : quelques cm en 100 ans.
S. Gaboreau, F. Claret (2009) – BRGM/RP-57194-FR
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Consequences for development requirements
For hydraulic flow and solute transfer in saturated porous media, tools have now a high level of performance and robustness
Consequently, the evolutions are in the margin
Progress of solvers and computer capacities decreases the level of interest in some approaches
e.g., the range of application in using term source homogenization and space domain decomposition methods could be reduced with HPC
Tools are sometimes in advance on data
The credibility of simulation implies a strong link with experimentation
To be able to reproduce by simulation some experimentation (calibration)To extrapolate results on long time and large space scales
23 novembre 2009C.TR.AEAP.09.009112
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra
The GNR MoMaS
23 novembre 2009C.TR.AEAP.09.009113
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
GNR MoMaS Goals
Gather the knowledge in methods and numerical analysis, in mathematical modeling and in simulation to benefit of the state of the art in the field of repository simulation
Ensure communication between applied mathematics and other scientific fields organized such as GNR (or similar)
Develop new ideas about phenomena and tools to keep on increasing the level of understanding
Develop research level work linked to new modeling and the numerical issues raised by radwaste disposal simulation
Highlight research work on practical applications, by improving coupling of knowledge and scientific tools within the community of the applied mathematics
23 novembre 2009C.TR.AEAP.09.009114
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Results (1/3)
Gather the competences The GNR involves many research laboratories.
It proposes benchmarks to international scientific community
Develop new ideas and research-level workMany scientific publications
Members attend conferences with some specific sessions linked to topics of GNR
GNR organizes specific workshops about relevant topics, and open discussions with other teams
Ensure communication with other scientific fieldsUseful and necessary cooperation between scientific fields
Previous discussions/exchange with other GNR (FORPRO et PARIS) but some difficulties to set up common projects
23 novembre 2009C.TR.AEAP.09.009115
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Results (2/3)
Highlight research work on practical applicationsAndra’s requirements are related to practical cases in terms of physical representation and numerical tools
They are reflected in the evolution of GNR themes since 2002, in order to improve the modelization of the physical processes and repository structures
Examples of added-valueReactive Transport
Significant progress (Benchmarks, PhDs at INRIA and IMFS, etc.) especially on the different coupling methods and their application fieldNeed to take into account much more complex chemical processes: kinetics, flow and transport input data retroaction, number of species, …
23 novembre 2009C.TR.AEAP.09.009116
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Results (3/3)
AND HOWEVER…
The added-value from GNR MoMaS Research
work could be of more benefit for ANDRA…
23 novembre 2009C.TR.AEAP.09.009117
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Questions
Some difficultiesGap between research work and operational tools
Development of operational tools, validated, documented, and maintained requires a large amount of work,The structure and funding of GNR MOMAS are not appropriate to sustain such a transition to operational tools
Research missions are hardly adapted to development and validation of new methods and tools in case of large scale realistic applications
Example : particle-tracking methods in far field require the development of a new tool
Simulation tools structure is not always fitted to test new numerical methods
Example : Jacobian matrix of chemical system, needed for some coupled algorithms, is not available in geochemistry codes
23 novembre 2009C.TR.AEAP.09.009118
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra
Some proposals
23 novembre 2009C.TR.AEAP.09.009119
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Scientific themes (1/2)
Themes in relation with the physical processesTwo-phase flows and radionuclide transfer
Few available tools, but involved physics is enriching continuouslyExample : the wide range of “EOS” modules for “Tough” code family
Progress is still needed in terms of robustness and performance
Reactive TransportCoupling algorithms often face convergence trouble when modelling complexity increasesIt is needed to diversify numerical approaches to deal efficiently with the various configurationsBut... computation time rapidly increases and becomes prohibitive
An open investigation field: multi-scale modellingAn advanced theme, upstream from the operational tools, strongly linked with other disciplines and the experimental fieldBuilding models at the various scales considered, based upon the elementary mechanisms
Approximations when up-scaling must be quantified
23 novembre 2009C.TR.AEAP.09.009120
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Scientific themes (2/2)
Numerical themes are primarily aimed at robustness, performance and accuracy
Error estimation primes over fifth decimal accuracy...
For the simulation of flow and solute transfer:Many tools are available, many of them have reached maturity, both in terms of physics taken into account and of resolution methods usedFurther needs target:
Error control, High Performance Computation (HPC)Time discretization controlMesh control
23 novembre 2009C.TR.AEAP.09.009121
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Expected Results (1/2)
Kinds of worksDo not try to develop “complete” industrial codes
Andra does not expect new fully integrated tools as Porflow, Tough2, Comsol, etc., able to deal with problems at all repository scales
Develop algorithms candidate for integration in existing simulation tools, in direct link with the computers evolution
Example: Parallel Solvers, Solvers under constraint, Coupling algorithms
Favour continuity in the tools developmentExample: development of the Traces code at IMFS, the host structure for algorithm studies
Multidisciplinarity is crucial to ensure the link between experiment, modelling and simulation
Benchmarking activities tightly linked with applications and experimentation are important to:
Compare methods and toolsStrengthen the confidence in the simulation results
23 novembre 2009C.TR.AEAP.09.009122
AGENCE NATIONALE POUR LA GESTION DES DÉCHETS RADIOACTIFS© Andra© Andra
Expected Results (2/2)
Implication of AndraImprove requirements description
Associate correspondents dedicated to the different themes in direct link with simulation at Andra
Put the stress on the valorisation of validated results in toolsDefinition of comparative benchmarksEnsure the link with software editors and/or engineering companies
Widen the thematic field to Andra’s Scientific Division at large
Example : a Ph.D. Thesis just began in collaboration with the Transfer & Migration Department
Ensure the link with the experimental field
23 novembre 2009C.TR.AEAP.09.009123