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Progress of fusion technology: summary of FIP, FNS, MPT, and SEE from the 27th IAEA Fusion Energy Conference

Takashi Inoue2019年Nuclear FusionIF 3出版社

Two hundred and twenty-five papers relevant to fusion technology and engineering were presented at the 27th IAEA Fusion Energy Conference. The ITER project has reached 57.4% of the total construction work scope through to first plasma. Construction of ITER is indeed progressing at full speed, with some ITER components having already been manufactured, such as the toroidal field coil structures and the gyrotrons of the electron cyclotron heating and current drive system, as a result of decades of technological development. Construction of JT-60SA and WEST is also progressing on schedule to support ITER in various engineering and physics aspects. The EU and Japan are advancing with their pre-conceptual designs for DEMO, and the experience and lessons learned from ITER are already being applied to both designs. China reported on the status of the China Fusion Engineering Test Reactor engineering design. One of the technical issues evident from these DEMO designs is the interfacing of the plasma-facing, in-vessel components with plasmas. Advanced plasma-facing elements having liquid metals and an advanced in situ boron coating technology were applied to existing fusion reactors, the results of which were reported at this conference. It was also reported that commissioning of the injector for the International Fusion Materials Irradiation Facility engineering validation and engineering design activities (IFMIF/EVEDA) project has been completed and testing of the Radio Frequency Quadrupole accelerator has begun. Europe and Japan presented their plans to construct neutron irradiation test facilities: the DEMO-Oriented Neutron Source (DONES) and Advanced Fusion Neutron Source (A-FNS), respectively. A new strategy based on a probability-based design method was proposed to mitigate the difficulty of defining the allowable limit for irradiation-induced degradation with limited empirical evidence.

日本語訳

第27回IAEA核融合エネルギー会議において、核融合技術および工学に関連する225件の論文が発表された。ITERプロジェクトは、ファーストプラズマまでの全建設作業範囲の57.4%に達した。ITERの建設は確かに本格的な速度で進展しており、数十年にわたる技術開発の結果として、トロイダル磁場コイル構造物や電子サイクロトロン加熱・電流駆動システムのジャイロトロンなど、一部のITER構成機器はすでに製造されている。JT-60SAおよびWESTの建設も、様々な工学的・物理学的側面でITERを支援するため、計画通りに進展している。EUと日本はDEMOの事前概念設計を進めており、ITERから得られた経験と教訓は既に両設計に適用されている。中国は、中国核融合工学試験炉の工学設計の状況について報告した。これらのDEMO設計から明らかになった技術的課題の一つは、プラズマ対向の真空容器内機器とプラズマとのインターフェースである。液体金属を用いた先進プラズマ対向要素と、先進的なin situホウ素コーティング技術が既存の核融合炉に適用され、その結果が本会議で報告された。また、国際核融合材料照射施設の工学検証・工学設計活動(IFMIF/EVEDA)プロジェクト用インジェクターの試運転が完了し、高周波四重極(RFQ)加速器の試験が開始されたことも報告された。欧州と日本は、それぞれ中性子照射試験施設であるDEMO指向中性子源(DONES)と先進核融合中性子源(A-FNS)の建設計画を発表した。限られた実験的証拠しかない中で照射誘起劣化の許容限界を定義することの難しさを緩和するために、確率論に基づく設計手法を用いた新しい戦略が提案された。

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