Design of a water cooled monoblock divertor for DEMO using Eurofer as structural material |
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| Affiliation: | 1. CEA, IRFM, F-13108 Saint Paul Lez Durance, France;2. CEA, DEN, Saclay, DM2S, SERMA, F-91191 Gif-sur-Yvette, France;3. Associazione EURATOM-ENEA sulla Fusione, C.R. Frascati, IT-00044 Frascati, Italy;1. Scientific Technical Center SINTEZ, D.V. Efremov Institute, 196641 St. Petersburg, Russia;2. I.I. Polzunov Scientific & Development Association on Research and Design of Power Equipment, 191167 St. Petersburg, Russia;1. Korea Atomic Energy Research Institute, Daejeon, Republic of Korea;2. National Fusion Research Institute, Daejeon, Republic of Korea;1. Fusion for Energy, 2 Carrer Josep Pla, 08019 Barcelona, Spain;2. AREVA NP, 30 bd de l’Industrie, 71205 Le Creusot, France;3. ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul Lez Durance, France;1. Dipartimento di Energia, Ingegneria dell’Informazione e Modelli Matematici, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy;2. ITER Organization, Route de Vinon-sur-Verdon, CS 90 046, 13067 St Paul Lez Durance Cedex, France |
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| Abstract: | The performed investigation focus on a monoblock type design for a water cooled DEMO divertor using Eurofer as structural material. In 2013, a study case of such a concept was presented. It was shown that basic concepts using Eurofer as structural material are limited to an incident heat flux of 8 MW m−2. Since, the EFDA agency issued new specifications. In this study, the conceptual design is reassessed with regard to specifications. Then, steady state thermal analyses and thermo-mechanical elastic analyses have been performed to define an upgrade of the geometry taking into account new specifications, design criteria and the maximum heat flux requirement of 10 MW m−2. An analysis of the influence of each adjustable geometrical parameter on thermo-mechanical design criteria was performed. As a consequence, geometrical parameters were set in order to fit to materials requirements. For defined hydraulic conditions taken in the most favourable configuration, the limit of this design is estimated to an incident heat flux of 10 MW m−2. Margin to critical heat flux and rules against progressive deformation/ratcheting in structural material limit the design. |
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| Keywords: | DEMO Divertor Design |
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