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Activation analysis of ITER blanket first wall

A. Lopatkin, V. Muratov1998年Fusion Engineering and DesignIF 1.7出版社

AbstractTo analyze the activation of ITER blanket structural components, the authors have prepared the AUCDAS code that calculates changes in nuclide concentrations and radioactivity characteristics during neutron irradiation and during cooling. UCDAS takes into account all neutron reactions and decay types, the prepared library of constants contains nuclear data of nuclides from hydrogen to californium. A comparative analysis of the results as obtained using UCDAS code and the widely known FISPACT code is given. The analysis of decay heat, gas generation and activity of ITER blanket first wall's structural components was carried out. The beryllium coating, copper alloy and stainless steel were analysed. Calculations were performed for the first plasma burning pulse, 6 months and 1 year of operation in accordance with the ITER scenario. The materials recommended by ITER central team and their Russian analogs were considered: TGR and B1 (beryllium coating), GlidCop AL-25 Ds and Br-MKX (copper alloy), 316LN-IG and 12Cr18Ni10Ti (stainless steel). It has been demonstrated that there is a difference in all of the considered characteristics between the above materials. It is caused by impurities which are present in the materials. The report also considers the accumulation of gases (H, D, T, He3,He4) in the above materials. Besides, the change in the activity of irradiated materials during the cooling of up to 107 years was calculated.

日本語訳

ITERブランケット構造材料の放射化を解析するため、著者らは中性子照射中および冷却中の核種濃度と放射能の変化を計算するAUCDASコードを作成した。UCDASはすべての核反応と崩壊を考慮し、作成された定数ライブラリは水素からカリフォルニウムまでの核種の核データを含む。UCDASコードを用いて得られた結果と広く知られているFISPACTコードとの比較解析を示す。ITERブランケット第一壁構造材料の崩壊熱、ガス生成、および放射能の解析を実施した。ベリリウム被覆材、銅合金、およびステンレス鋼を解析対象とした。計算はITERシナリオに従って、最初のプラズマ燃焼パルス、6ヶ月間および1年間の運転について実施した。ITER中央チームが推奨する材料とそのロシア相当材料を検討した:TGRおよびB1(ベリリウム被覆材)、GlidCop AL-25 DsおよびBr-MKX(銅合金)、316LN-IGおよび12Cr18Ni10Ti(ステンレス鋼)。検討したすべての特性において、上記材料間に差異があることが実証された。これは材料中に存在する不純物に起因する。本報告書ではまた、上記材料におけるガス(H、D、T、He3、He4)の蓄積についても考察する。さらに、最大107年間の冷却期間中の照射材料の放射能変化を計算した。

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ITERFirst wallITER blanket
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