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Conceptual design of a closed vacuum pumping system using turbomolecular pump for fusion reactor

K. Akaishi1989年Fusion Engineering and DesignIF 1.7出版社

AbstractAs a vacuum pumping system for a D—T fusion reactor, a closed type of pumping system which does not exhaust DT fuel gas and removes only impurity gas including helium ash is proposed. The closed system is defined as a closed vacuum circuit in which only DT fuel gas can be circulated and refueled to the reactor. The basic components in the system consist of turbomolecular pumps, dry vacuum pumps, cryocondensation pumps and gas reservoirs. Helium ash removal is affected by use of getter materials for DT gas. Other impurity gas is pumped with 50 K cryocondensation pumps, and at the regeneration phase the pumped gas is dealt with by a tritium clean-up system. The detailed design of the system is described and the possibility of the system for practical use is discussed.

日本語訳

D—T核融合炉用の真空排気システムとして、DT燃料ガスを排気せず、ヘリウム灰を含む不純物ガスのみを除去する閉鎖型排気システムを提案する。閉鎖型システムは、DT燃料ガスのみを循環させ、炉へ再供給できる閉鎖真空回路として定義される。本システムの基本構成要素は、ターボ分子ポンプ、ドライ真空ポンプ、クライオ凝縮ポンプ、およびガス貯蔵容器からなる。ヘリウム灰の除去は、DTガス用ゲッター材料の使用によって達成される。その他の不純物ガスは50Kクライオ凝縮ポンプによって排気され、再生段階では、排気されたガスはトリチウム浄化システムによって処理される。本システムの詳細設計について述べ、実用化の可能性について考察する。

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