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Diagnostics for plasma control on DEMO: challenges of implementation

A.J.H. Donné, A.E. Costley, A.W. Morris2012年被引用 31Nuclear FusionIF 3出版社

As a test fusion power plant, DEMO will have to demonstrate reliability and very long pulse/steady-state operation, which calls for unprecedented robustness and reliability of all diagnostic systems (also requiring adequate redundancy). But DEMO will have higher levels of neutron and gamma fluxes, and fluences, nuclear heating, and fluxes of particles than ITER, and probably reduced physical access. In particular, the neutron fluence will be about 15–50 times higher than that in ITER. As a consequence, some diagnostics that will work in ITER are likely to be unfeasible in DEMO. It is important, therefore, to develop a new way of thinking with respect to that employed to date in which diagnostics are added after the machine has been basically designed: if certain diagnostics are deemed essential for the control of DEMO, they will have to be taken into account during the entire design phase.

日本語訳

試験核融合発電所として、DEMOは信頼性と非常に長いパルス/定常運転を実証しなければならず、そのためには全計測システムの前例のない堅牢性と信頼性(適切な冗長性も必要)が求められる。しかしDEMOは、ITERよりも高いレベルの中性子束およびガンマ線束、フルエンス、核発熱、粒子束を有し、おそらく物理的アクセスも制限されるであろう。特に、中性子フルエンスはITERの約15〜50倍になると見込まれる。その結果、ITERで動作する一部の計測器はDEMOでは実現不可能となる可能性が高い。したがって、これまで採用されてきた、機械が基本的に設計された後に計測器を追加するという考え方とは異なる新しい思考法を開発することが重要である。すなわち、特定の計測器がDEMOの制御に不可欠と判断される場合、それらは設計段階全体を通じて考慮されなければならない。

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