Computational Challenges of Fusion Neutronics for ITER Ports
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作者:
Serikov, A.
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Karlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, GermanyKarlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
Serikov, A.
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Fischer, U.
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Karlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, GermanyKarlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
Fischer, U.
[1
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Pitcher, C. S.
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ITER Org, Route Vinon Sur Verdon, F-13115 St Paul Les Durance, FranceKarlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
Pitcher, C. S.
[2
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Suarez, A.
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ITER Org, Route Vinon Sur Verdon, F-13115 St Paul Les Durance, FranceKarlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
Suarez, A.
[2
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Weinhorst, B.
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Karlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, GermanyKarlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
Weinhorst, B.
[1
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机构:
[1] Karlsruhe Inst Technol, Inst Neutron Phys & Reactor Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
[2] ITER Org, Route Vinon Sur Verdon, F-13115 St Paul Les Durance, France
This paper elaborates computational challenges tackled for providing neutronics service supplied for developing the design of the Diagnostics Equatorial and Upper Port Plugs (EPP and UPP). The aim was to guide and assist the EPP and UPP design developers with optimal shielding solutions which are characterised of maintain the diagnostics purposes of the systems together with adequate radiation shielding performance. The target parameter for the shielding optimization was the minimum of Shut-Down Dose Rate (SDDR) inside the interspace between the port back-side and ITER bioshield. This aim was reached by parametric neutronic analyses of the shielding geometry and material composition, mitigating direct streaming of neutrons from the plasma by arranging the labyrinths and horizontal rails. Variation of many geometrical parameters of the labyrinths was possible only by applying the high performance parallel computations with MCNP5 using pure MPI and hybrid OpenMP/MPI parallelization techniques on several available supercomputers. MCNP5 parallel performance assessments were carried out to find an efficient way to run the code in a parallel regime. It was found a strong scaling (up to 4096 cores) performance of the MCNP5 jobs running with analogue Monte Carlo sampling and weak scaling for the tasks with biased sampling as a variance reduction technique, such as the MCNP5 intrinsic weight window generator. Deep penetrating radiation in the complex ITER tokamak geometry combined blocks of strong attenuation of the radiation together with the void gaps along which the particles are streamed freely contributes to computation challenges of radiation transport.
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Osaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, JapanOsaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, Japan
Murata, Isao
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Tamaki, Shingo
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Kusaka, Sachie
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Maemunah, Indah Rosidah
Sato, Fuminobu
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机构:
Osaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, JapanOsaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, Japan
Sato, Fuminobu
Miyamaru, Hiroyuki
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机构:
Osaka Metropolitan Univ, Grad Sch Engn, Div Quantum & Radiat Engn, Sakai, Osaka 5998531, JapanOsaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, Japan
Miyamaru, Hiroyuki
Yoshida, Shigeo
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Tokai Univ, Sch Engn, Dept Appl Chem, Hiratsuka, Kanagawa 2591292, JapanOsaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, Japan