Fischer, U.

Häußler, A.

Leichtle, D.

Nunnenmann, E.

Pereslavtsev, P.

Qiu, Y.

Raj, P.

Travleev, A.

Weinhorst, B.

English

KITopen

KIT – University of the State of Baden-Wuerttemberg andNational Research Center of the Helmholtz AssociationLarge-scale radiation transport applications• General: high-detail geometry models, massive-parallel MC radiationtransport with mesh-based variance reduction techniques and source biasing.• ITER: Nuclear heat distributions in water-cooled structures of plasma heatingand current drive port-based systems.• ITER: Shutdown-dose rate distributions in maintenance areas behind a Test-Blanket-Module system.• DEMO: activation behaviour of breeder blanket materials-• HELIAS: neutron transport through radiation shield of complex and twistedstellarator geometry.• DONES: radiation shielding in high-intensity irradiation facility.High Fidelity Monte Carlo for Fusion NeutronicsB. Weinhorst, D. Leichtle, A. Häußler, E. Nunnenmann, P. Pereslavtsev, Y. Qiu, P. Raj, A. Travleev, U. FischerKarlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, GermanyIntroduction• Advanced modelling and simulation techniques for neutronics analyses of fusion reactors (ITER, DEMO, HELIAS) and experimental facilities (DONES)• Monte Carlo radiation transport and activation solver (MCNP, R2Smesh).• Use of detailed 3D geometry models, continuous energy nuclear interaction cross sections and high-resolution mesh results.• Massive-parallel HPC resources required for large-scale simulations.Acknowledgements and DisclaimerThis work was performed on the computational resource ForHLR II funded by the Ministry of Science, Research and the Arts Baden-Württemberg and DFG("Deutsche Forschungsgemeinschaft").Parts of the work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and trainingprogramme 2014-2018 under grant agreement No 633053. Parts of the work were supported by Fusion for Energy (F4E), Barcelona, through the Specific GrantAgreements F4E-GRT-615 and F4E-FPA-395.02. The views and opinions expressed herein do not necessarily reflect those of the European Commission. Parts ofthe work has been funded by the ITER Organization under contract IO/17/CT/4300001445.Parts of the work was carried out using an adaption of A-lite and C-Model which were developed as a collaborative effort between AMECFW (International), UKAEA(UK), ENEA Frascati (Italy), F4E (Spain), FDS Team of INEST (PRC), IDOM (Spain), ITER Organization (France), QST (Japan), KIT (Germany), UNED (Spain),University of Wisconsin-Madison (USA).21th Results and Review Workshop HLRS4.-5.10.2018, University StuttgartKarlsruhe Institute of TechnologyInstitute for Neutron Physics and Reactor Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen, Germany Internet: http://www.kit.eduE-Mail: dieter.leichtle@kit.eduPart 1: Development of tools• Coupled radiation transport and activation code system• Sensitivity to mesh resolution• Verification and validation of alternative radiation transport codes• Simulation of self-powered neutron/photon detectorsPart 2: Applications to fusion design analyses• Heating systems of ITER fusion reactor• Test-Blanket-Modules (TBM) in ITER• Breeding blankets in DEMO fusion reactor• HELIAS stellarator reactor• DONES fusion material irradiation facilityMultiphysics simulation of nuclear detectors• Sensitivity of self-powered detectors to various incident particles and modesignal generation under typical fusion plasma conditions.• MC simulations with neutron, photon, electron and proton transport.Transport&Activation: R2S flowchartCode system for coupled transport and activation• Parallel execution of MC particle histories followed by quasi-parallel activationcalculations on a mesh grid.• Improving performance of data processing and distribution by driver scriptusing MPI library.Mesh convergence in coupled transport and activation• Twin mesh approach for fluctuations on small and large resolution.• Sensitivity study on mesh size dependence and convergence of final result.• Optimum resolution dependent on mesh adaptation level (superimposedmesh).Shutdown dose rate in cylindrical shield assemblyMC simulation of self-powered detectorShutdown dose rate map in JET tokamakMesh resolution studyNuclear heat distribution in EC Heating Plug Shutdown dose rate around portITERDONESHELIASNeutron flux in test cellNeutron wall load and flux distribution

High Fidelity Monte Carlo for Fusion Neutronics

P Pereslavtsev

L Peng

S Agostinelli

P Raj

Bastian Weinhorst

André Häußler

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https://publikationen.bibliothek.kit.edu/1000090234/22299955

High Fidelity Monte Carlo for Fusion Neutronics

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