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Technological exploitation of the JET neutron environment: progress in ITER materials irradiation and nuclear analysis

L.W. Packer, P. Batistoni, N. Bekris, S.C. Bradnam, M. Fabbri, Z. Ghani, M.R. Gilbert, R. Kierepko, E. Łaszyńska, D. Leichtle2021年被引用 8Nuclear FusionIF 3出版社

Several experimental activities have been conducted within the 'ACT' sub-project under the EUROfusion WPJET3 programme with the purpose to ultimately irradiate ITER materials within the JET D–T neutron environment. The latest results of these activities are presented in this work. The ITER materials include: poloidal field coil jacket samples and toroidal field coil radial closure plate steels, EUROFER 97-2 steel, W and CuCrZr materials from the divertor, Inconel 718, CuCrZr and 316L stainless steel for blanket modules and vacuum vessel forging samples. The experimental results presented here include gamma spectrometry measurements and analysis obtained from post-irradiated samples following the 2019 C38 (D–D) campaign, where a total of 97 samples were irradiated in a newly prepared long-term irradiation station assembly, comprising 27 ITER material samples, 70 dosimetry foils and two combination-foil detectors, known as 'VERDI' detectors. Measurements using a range of dosimetry reactions that are present in the IRDFF-II nuclear data file have also been used in preparatory work to characterise the irradiation locations. The latest ITER sample measurement results are presented along with initial comparisons with corresponding neutron transport and activation calculation predictions.

日本語訳

EUROfusion WPJET3プログラムの下での「ACT」サブプロジェクト内で、最終的にITER材料をJET D-T中性子環境内で照射することを目的として、いくつかの実験活動が実施されてきた。これらの活動の最新結果が本稿で提示される。ITER材料には、ポロイダル磁場コイルジャケット試料、トロイダル磁場コイル径方向閉鎖板鋼、EUROFER 97-2鋼、ダイバータ用WおよびCuCrZr材料、ブランケットモジュール用インコネル718、CuCrZrおよび316Lステンレス鋼、真空容器鍛造品試料が含まれる。本稿で提示される実験結果には、2019年C38(D-D)キャンペーン後に得られた照射後試料からのガンマ線スペクトロメトリー測定および解析が含まれており、新たに準備された長期照射ステーションアセンブリ内で合計97試料が照射された。その内訳は、ITER材料試料27個、ドシメトリフォイル70枚、および「VERDI」検出器として知られる2つの組合せフォイル検出器である。IRDFF-II核データファイルに存在する一連のドシメトリ反応を用いた測定は、照射位置の特性評価のための準備作業としても使用された。最新のITER試料測定結果が、対応する中性子輸送および放射化計算予測との初期比較とともに提示される。

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