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Integrated design strategy for EU-DEMO first wall protection from plasma transients
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SYSNO ASEP 0565762 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Integrated design strategy for EU-DEMO first wall protection from plasma transients Author(s) Maviglia, F. (IT)
Bachmann, C. (DK)
Federici, G. (DE)
Franke, T. (DE)
Siccinio, M. (DE)
Albanese, R. (IT)
Ambrosino, R. (IT)
Arter, W. (GB)
Bonifetto, R. (IT)
Calabrò, G. (IT)
De Luca, R. (IT)
Grazia, L. E.Di. (IT)
Fable, E. (DE)
Fanelli, P. (IT)
Fanni, A. (IT)
Firdaouss, M. (FR)
Gerardin, Jonathan (UFP-V) ORCID
Lombroni, R. (IT)
Mattei, M. (IT)
Moscheni, M. (CZ)
Morris, W. (GB)
Pautasso, G. (DE)
Pestchanyi, S. (DE)
Ramogida, G. (IT)
Richiusa, M. (GB)
Sias, G. (IT)
Subba, F. (IT)
Villone, F. (IT)
You, J.H. (DE)
Vizvary, Z. (GB)Number of authors 30 Article number 113067 Source Title Fusion Engineering and Design. - : Elsevier - ISSN 0920-3796
Roč. 177, April (2022)Number of pages 20 s. Language eng - English Country CH - Switzerland Keywords demo ; Discrete limiters ; Electromagnetic simulations ; First wall load ; Plasma scenario optimization ; Plasma transients Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000807829700001 EID SCOPUS 85124801291 DOI 10.1016/j.fusengdes.2022.113067 Annotation This work presents an overview of the integrated strategy developed, as part of the DEMO Key Design Integration Issue 1 (KDII1), to protect the EU-DEMO first wall (FW) from planned and unplanned plasma transients by employing discrete limiters. The present Breeding Blanket (BB) FW design, which aims at minimizing the loss of neutrons while travelling to the breeding zone, is able to withstand steady state heat fluxes up to ≈1-1.5 MW/m² [1], which is not sufficient to guarantee its integrity for most plasma-FW direct contact. This is different from ITER, which has a FW designed for peak heat loads up to 4.6 MW/m2 [2], and it does not have the DEMO BB breeding related requirement. A series of documents was compiled in the DEMO Pre-Conceptual Design Phase, in support of the KDII1. The work presented here was presented at the 2020 DEMO Gate 1 (G1) review, and collects also the comments of the panel and the relative additional studies triggered by them. The design process, presented in this paper was adopted to systematically evaluate the impact of design changes, or new physics inputs, on the FW protection strategy and integration issues. It includes compiling the list of transients, and performing the relative plasma simulations, the design of discrete limiters and the evaluation of their capability to reduce the heat flux density on the FW, and finally a preliminary analysis of the heat loads effects on the Plasma Facing Components (PFC). All these aspects, together with preliminary limiter design, where considered since the beginning, in an integrated way. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0920379622000679?via%3Dihub
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