EURATOM INFORMATION MEETING

Transcription

1 EURATOM INFORMATION MEETING NOVEMBER 17, 2006 NURESIM NUCLEAR REACTOR SIMULATION Contact : christian.chauliac@cea.fr 1

2 OUTLINE Simulation for Nuclear Energy: towards the Numerical Reactor NURESIM scope, partnership and organization NURESIM work under progress 2

3 What is Simulation? Instrumentation Assessment Experimental Programs Modelling Softwares Numerical Methods Other definitions DNS Real time Real environment Interest of simulation Optimize experimental programs Capitalize knowledge Use of simulation Understand Design Forecast 3

4 Main industrial stakes for Nuclear Energy Economical competitiveness Safety Sustainable development of nuclear Energy (better use of resources) Present NPP GEN-III GEN-IV Continuity / present NPP Technological rupture Multipurpose computational tools are necessary to address these stakes 4

5 Needs and choices for computational tools Accuracy Fast calculation User friendliness Industrial stakes Multiscale Multiphysics Assessment HPC Integrated approach Collaborations Pre-pro Supervision Post-pro Scientific and technical challenges Physics Numerics Computer Science 5

6 INTEGRATION Supervision Pre-treatment Post-treatment * System Core + Vessel MULTIPHYSICS Assembly Rod 6

7 OUTLINE Simulation for Nuclear Energy: towards the Numerical Reactor NURESIM scope, partnership and organization NURESIM work under progress 7

8 NURESIM SCOPE AND OBJECTIVES Feb Jan Industrial Needs Scientific challenges (physical modelling, numerical methods, computer science) Core Physics Thermalhydraulics Multiphysics Coupling Sensitivity & Uncertainties Integration Integration into a multiscale multiphysics platform Towards software standards More detailed physics Improvement of efficiency in simulation 8

9 PARTNERS OF THE NURESIM IP 18 Organizations 13 Countries KTH LUT VTT UCL TUD FZR GRS UK NRI CEA EDF PSI ASCOMP JSI KFKI UP INRNE UPM 9

10 NURESIM ORGANIZATION CHART Governing Board Chairman EC Users Group Executive Committee Project Coordinator SP1 Core Physics Coordinator SP2 T/H Cord SP3 Multiphysics Coord. SP4 S & U Coord SP5 Integration Coordinator (Internal Web Site) (External Web Site) 10

11 NURESIM MANPOWER Integration S & U Multi-Physics Core Physics Thermalhydraulics Total EC Funding: 4.5 M Total Manpower: 73 p*y 11

12 OUTLINE Simulation for Nuclear Energy: towards the Numerical Reactor NURESIM scope, partnership and organization NURESIM work under progress 12

13 SP5: INTEGRATION The Salome Platform An Open Source Platform (LGPL license) from CAD to post-processing CAD System CAD Interface CAD Modification Meshing Data Supervision MED Codes Visualisation Post Download 13

14 SP5: THE NURESIM PLATFORM 14

15 MED (Data Exchange Model): the Rosetta stone of SALOME A common format to facilitate exchanges between solvers Code 2 Code 3 (format I/O 2) (format I/O 3) Common exchange format Code 1 Code 4 (format I/O 1) (format I/O 4) all integrated solvers are able to import/export data in a common format possibility of sharing high-level services on meshes and fields (interpolation, non-conform meshes, ) 15

16 A three-layer infrastructure User environment, studies management, coupling SHARED (OPEN- SOURCE) PWR PWR TH GCR Neutronics GCR Fuel Neutronics PROPRIETARY Neutronics Toolbox Thermohydraulics Toolbox Fuel Toolbox SHARED BETWEEN PARTNERS 16

17 Three levels for three different contributors 17

18 SP2: TWO-PHASE THERMALHYDRAULICS SYSTEM SCALE DNS SCALE CMFD IN OPEN MEDIA CFD IN POROUS MEDIA Critical review of experimental data, improvement of models and modules, assessment and benchmarking 18

19 SP2: TWO-PHASE THERMALHYDRAULICS FIRST «SITUATION TARGET»: PRESSURIZED THERMAL SHOCK DOME ECC PRIMARY PUMP DOME ECC PRIMARY PUMP CORE Vessel axis CORE 3D Local meshing DOWNCOMER Cold leg 19

20 Scientific challenges HP injection steam suplly cold leg "break" Zone A recirculation Zone B high turbulent mixing Zone C thermal stratification weir "downcomer" 20

21 SP2: TWO-PHASE THERMALHYDRAULICS SECOND «SITUATION TARGET»: CRITICAL HEAT FLUX Towards a more mechanistic approach 21

22 SP1: CORE PHYSICS Two main areas Advanced Monte-Carlo Methods Advanced Deterministic Methods Three main topics Integration of the existing codes and modules into the platform Benchmarks Improvement of the codes and modules 22

23 Deterministic core calculation 23

24 SP3: MULTIPHYSICS Interpolation and averaging schemes and data transfer Coupling schemes At the nodal level (fuel assembly) At the sub-node level (pin) Application to Power Plants 24

25 SP4: SENSITIVITY AND UNCERTAINTY Deterministic and statistical methods for multiphysics modules Implementation within the NURESIM platform of procedures for propagation of uncertainties 25

26 CONCLUSION (1/2) An integrated approach Closer links between the Industry, the Safety Bodies, the Universities and the R&D Labs better efficiency 18 partners: a large panel of skills for a common objective instead of previous dispersion Common critical review of shared data bases Strong possible breakthroughs in physical modeling, numerical methods and computer science A step in a long term strategy towards a European Software Platform for Nuclear Energy A contribution to public acceptability of the safe operation of nuclear power 26

27 CONCLUSION (2/2) From NURESIM-1 (FP6) to NURESIM-2 (FP7) Broadening the scope towards Gen-IV More weight on Multi-Physics and Multi-Scale New physical fields such as fuel behaviour Further developments of physical models with an associated experimental program Towards more operational modules and methods 27

28 END 28