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Neutronics experiments for uncertainty assessment of tritium breeding in HCPB and HCLL blanket mock-ups irradiated with 14 MeV neutrons

P. Batistoni, M. Angelone, U. Fischer, A. Klix, I. Kodeli, D. Leichtle, M. Pillon, W. Pohorecki, R. Villari2012年被引用 39Nuclear FusionIF 3出版社

Two neutronics experiments have been carried out at 14 MeV neutron sources on mock-ups of the helium cooled pebble bed (HCBP) and the helium cooled lithium lead (HCLL) variants of ITER test blanket modules (TBMs). These experiments have provided an experimental validation of the calculations of the tritium production rate (TPR) in the two blanket concepts and an assessment of the uncertainties due to the uncertainties on nuclear data. This paper provides a brief summary of the HCPB experiment and then focuses in particular on the final results of the HCLL experiment. The TPR has been measured in the HCLL mock-up irradiated for long times at the Frascati 14 MeV Neutron Generator (FNG). Redundant and well-assessed experimental techniques have been used to measure the TPR by different teams for inter-comparison. Measurements of the neutron and gamma-ray spectra have also been performed. The analysis of the experiment, carried out by the MCNP code with FENDL-2.1 and JEFF-3.1.1 nuclear data libraries, and also including sensitivity/uncertainty analysis, shows good agreement between measurements and calculations, within the total uncertainty of 5.9% at 1σ level.

日本語訳

2つの14 MeV中性子源を用いた中性子工学実験が、ITERテストブランケットモジュール(TBM)のヘリウム冷却ペブルベッド(HCPB)型およびヘリウム冷却リチウム鉛(HCLL)型のモックアップに対して実施された。これらの実験により、2つのブランケット概念におけるトリチウム生成率(TPR)の計算の実験的検証と、核データの不確かさに起因する不確かさの評価が提供された。本論文では、まずHCPB実験の概要を簡潔に述べ、その後、HCLL実験の最終結果に特に焦点を当てる。TPRは、フラスカティ14 MeV中性子発生装置(FNG)において長時間照射されたHCLLモックアップで測定された。相互比較のため、異なるチームによって、冗長性があり十分に検証された実験手法を用いてTPRが測定された。また、中性子およびガンマ線スペクトルの測定も実施された。FENDL-2.1およびJEFF-3.1.1核データライブラリを用いたMCNPコードによる実験解析は、感度・不確かさ解析も含めて、測定値と計算値の間に、1σレベルで総合不確かさ5.9%以内の良好な一致を示している。

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TritiumNeutronicsHelium-cooled pebble bedHelium-cooled lead-lithiumTritium breeding
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