FPA-611: Development of simulation tools for the exploitation of the HCLL and HCPB TBM System operation in ITER. Technical scope

Transcription

1 FPA-611: Development of simulation tools for the exploitation of the HCLL and HCPB TBM System operation in ITER Technical scope 1

2 OUTLINE 1 Introduction Technical areas of interest Development strategy Scope of FPA activities 5 Conclusion: Schedule & Discussions Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 2

3 OUTLINE 1 Introduction o HCLL and HCPB TBS o Relation to TBM program mission o General requirements Background and Foreground EUROFER97 Framework Partnership Agreement Conclusion: Schedule & Discussions Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 3

4 The HCLL and HCPB TBM Systems (TBS) 2 Tritium Extraction/ Recovery Systems (Tritium Building) 2 Helium Cooling Systems 2 Helium Purification Systems (CVCS Area) Helium-Cooled Lithium-Lead (HCLL) TBM 1 Ancillary Equipment Unit and connection pipes (Port Cell) Helium-Cooled Pebble-Bed (HCPB) TBM 2 TBMs and their Radiation Shield (Port Extension) Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 4

5 European TBM Concepts 2 different concepts but same structural material - EUROFER97 HCLL (He-Cooled lithium-lead) HCPB (He-Cooled Pebble-Bed) Structural material EUROFER97 (RAFM steel) Coolant Helium (8 MPa, C) Tritium breeder, Neutron multiplier Liquid: Pb-16Li Solid pebbles: Li 2 TiO 3 / Li 4 SiO 4, Be Sub-systems HCS, CPS, TES, PbLi loop HCS, CPS, TES Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 5

6 Helium Cooled Pebble Bed TBM Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 6

7 Helium Cooled Lead Lithium TBM Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 7

8 Development of tools in support of TBM program scientific mission The validation of simulation tools for the design of the breeder blanket for a fusion energy system (DEMO and beyond) is a fundamental part of the TBM program scientific mission. From the ITER research plan: Validation of the capability of the neutronic codes and nuclear data to predict TBM nuclear response Validation of the TBMs thermo-mechanical behavior Validation of components operation for heat extraction and T management Extrapolate the reliability and operational performance to Demo relevant operating conditions (except for neutron fluence) for an extended period of time Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 8

9 General requirements Tools will be used for TBS test data analysis (correlative function) and as basis for fusion blankets design (predictive function). Detailed models to describe the behaviour of TBS components at a level of depth that allow the mapping in space and time of all the physical parameters that are measured during the TBS experimental campaigns. General models with strong numerical solution schemes to apply beyond validation test conditions (parametric extrapolation), and more complex systems (no simplified models, lumped parameters, etc ) Background information (previous results, state-of-the-art) is not reviewed systematically in this Info Day, but will be part of the reference documents of the Call for Proposal. Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 9

10 Challenges for simulation tools development Complex phenomena Integrated environment Limited validation Models at the frontier of computational science Fusion neutrons transport with breeder/multiplier materials Time scale: from 10-6 s (MD) to components lifetime (corrosion) Spatial resolution: from 10-6 (BL) to 100 m (pipes) Limited experimental facilities with relevant conditions (neutron flux, magnetic field, tritium, lpb-16li, heat flux) Tritium generation, transport, extraction MHD phenomena Multi-physics description Complex integration with ITER operation (models input, boundaries) Limited experience with benchmarking standards Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 10

11 OUTLINE 2 Introduction Technical areas Development strategy Scope of FPA activities o Thermo-hydraulics, MHD, chemistry of Pb-16Li o Tritium transport in solids, liquids, gases and interfaces o Structural analysis of TBS components (including PBTM) o EM analysis of ferromagnetic structures Conclusion: Schedule o Helium & thermo-hydraulics Discussions Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 11

12 Behaviour of the liquid metal in the HCLL PbLi loop and TBM Different but coupled physics phenomena Oxidation and phase transition Title and impurities control Chemistry MHD Pb-16Li Tritium transport in materials and interfaces MHD enhanced corrosion Mass transport Thermal Hydrodynamic Heat transfer coefficient Temperature distribution Pressure drop Velocity profile Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 12

13 The HCLL TBM is a complex MHD sensitive design Flow bending + narrow gap Electrical flow coupling 3D expansions/ contractions Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools

14 Velocity profiles: instrumented test sections vs simulation u u 1 Ha = 3000 Re = 630 Re = 2019 Ha = D, fully developed flow Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools

15 Tritium transport in solid, liquid gases and their interfaces Limited local and time dependent measurement of tritium concentration Tritium accountancy is performed by concentrating tritium in TES/CPS and batch measurement of output streams at the Tritium Accountancy Station (TAS) To evaluate the performance (TBM in terms of generation, TES in terms of removal, CPS in terms of permeation control) is necessary to simulate the migration of tritium thru the systems and interfaces Ongoing GRT542 (CIEMAT EA) Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 15

16 Tritium transport is a coupled phenomena Li 4 SiO 4 Be Typical PbLi flow profile B 0 B = 0 Purge gas flow pattern in HCPB BUs HCLL BU equivalent simplified model F. Gabriel (CEA) et al., 2008 max. PRF = 30 EUROFER oxidized surface Permeation Reduction Factor (PRF) T concentration profile Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 16

17 Structural analysis of TBS components The comprehensive systems structural analysis of the TBS is part of design activities. Two classes of items included in FPA-611: models for specific components with unusual response and complexity intrinsic integration with the measured response or instrumentation deployment TBM Mechanical joint Pebble bed thermo-mechanics Modified stiffening rod x4 Washer x4 Nut x4 Reconstruct the global forces acting on the TBM box based on the structure modal analysis and strain measurements in the attachments Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 17

18 EM analysis Ferromagnetic structural material (EUROFER97) EM analysis performed as part of design activities (input to structural analysis). For data analysis there is a need to decouple the EM loads from forces reconstruction: Main activity in FPA-611 is verification and validation (benchmarking and test) Limited direct measurement of relevant parameters (B, induced currents) inside the TBM development of models for dedicated instrumented test sections (potential probes) Results from OPE L1 TO12 (NATEC) Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 18

19 Helium thermo-hydraulics The HCLL and HCPB TBS coolant is pressurized helium (80 MPa nominal) Objective is to enhance the capabilities of simulation tools already used in design activities Applications to TBM design, for example: Full 3-D turbulence model of cooling sections to evaluate HTC Cooling flow stability and uniformity (HCPB BU manifold) Application to HCS/CPS components: Analysis of transient behavior of Pressure Control System in case of HCS loss of pressure Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 19

20 OUTLINE Introduction Technical areas of interest 3 Development strategy Scope of FPA activities Conclusion: Schedule & Discussions Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 20

21 Scope of FPA-611 (phase 1) The development and qualification of the physics modelling blocks required to simulate the processes taking place in the TBS independently, or at the level of coupling inherent to the physics models, in the technical areas previously described. Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 21

22 Development strategy independent from design activities Exploitation of ITER TBM operation 2020 Single multi-physics / integrated suite of simulation tools for fusion breeder blankets design FPA611 Experimental test of sub-systems components in support of design (FPA372/FPA380) Thermo-hydr., system eng., comp. performance Neutronics analysis (FPA-395) Nuclear data, code/models benchmarking Design tools (OMF-331) TBM/sub-systems Neutronics, thermo-hydr., structural Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 22

23 FPA-611 synergies with design CDR 11/2014 Design OMF-331: Lot 1 (TBMs), Lot 2 (subsystems), Lot 4 (safety) Sensors TBS instrumentation development (FPA- 380-A2) and procurement of prototypes PDR 11/2016 Avoid duplication of work when scope is overlapping: neutronics, thermohydraulics, mechanical analysis, Models validation provides requirements for sensors development: measured parameters, sensitivity, accuracy, FDR 12/2018 Complement design needs for advanced simulation capability: MHD, tritium transport, PBTM, force reconstruction, End of FPA-611: 2019 Models validation and instrumentation capability define requirements for test plan development Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 23

24 OUTLINE 4 Introduction Technical areas of interest Development strategy Scope of FPA activities o Simulation tools development Conclusion: Schedule o Benchmarking & Discussions validation o Experiments validation o Application to TBS specifications Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 24

25 Type of activities in FPA-611 Simulation tools development Simulation tools validation and verification Application of simulation tools to TBS specifications Numerical solution of fundamental equations of the physical processes Optimization of algorithms and numerical schemes (including code parallelization) Benchmarking by comparison with analytical solutions or results of (certified) simulation tools Design, procurement and operation of validation experiments with instrumented test section (TBS relevant) Simulation tools validation by comparison with existing experimental data Quantitative analysis of the expected accuracy of simulation tools predictions during ITER operation Support the development and design integration of TBS instrumentation Predict the performance of TBS components (in support of design) Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 25

26 Out of Scope Boundary conditions for FPA-611 (development phase 1) Framework Partnership Agreement for 4 years => strategy with clear objectives HCLL and HCPB TBS design is ongoing => not about (re)design or optimization ITER operational and accidental conditions => not about extrapolation to DEMO Specific technical areas identified => not about models integration Neutronic codes out of the scope => scope covered by design and services Targeted models validation experiments => not systems/components performance ass Facilities available at time of proposal => no additional test facilities Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 26

27 OUTLINE Introduction Technical areas of interest Development strategy Scope of FPA activities 5 Conclusion: Schedule & Discussion Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 27

28 FPA-611: schedule Synergistic contractual activities for phase 1: o TBS design phases o FPA-611: expected 4 years frame to launch SGs o FPA-380 Action 1: TBS instrumentation development o FPA-380 Action 2: o FPA-372: o GRT-542: Tritium transport model upgrade TBS design life cycle Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 CDR PDR FDR Fab. -> FPA-611 Publish. KOM FPA Action 2 FPA-380 Action 1 FPA-372 GRT-542 Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 28

29 Discussion A few points shared from market analysis for FPA-611 and beyond The width of the technical scope is a major challenge to single beneficiaries proposals The necessary specialized expertise and facilities are available across EU industries, laboratories and universities The risk of manpower and schedule overload should be carefully considered and the involvement of new entities welcomed Program requirements (schedule, QA), integration with design activities (safety, licensing) and development objectives (integrated simulation tool for TBS) favor the participation of industries from Phase 1 The response to this Info Day confirmed so far the results of the preliminary market analysis Combine resources to form technical teams that can cover the full scope of the simulation tools development with a strong leadership (equivalent to an industrial integrator) to manage program requirements and schedule and focus towards the final tool procurement Information Day - Sept 17 th 2014 FPA-611 TBS simulation tools 29

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31 TBMA Master Schedule CD CDR 11/2014 PD PDR 11/2016 FD FDR 12/2018 QMU Legend: QMU: Qualification Mock-Up PMU: Prototypical Mock-Up D&I: Delivery and Installation FM: Functional Materials PMU A.S. EUROFER - TBM FM TBM SENSORS TBM TBM D&I IO 31

32 Coupled thermo-mechanical model Non-linear elasticity σ (ε) Creep law ε creep (T, σ, t) Thermal conductivity λ (T, ε) Be Be Material parameters are calibrated in prior experiments Drucker-Prager-Cap plasticity model Y. Gan, M. Kamlah (FZK), 2007

33 Model validation via temperatures Time (h) HELICA Loading: P max in six 1-hour steps Prediction error on T < ± 10%