Please use this identifier to cite or link to this item: http://hdl.handle.net/2067/47297
Title: Integrated design strategy for EU-DEMO first wall protection from plasma transients
Authors: Maviglia, Francesco
Bachmann, Christian
Federici, Gianfranco
Franke, Thomas
Siccinio, Mattia
Albanese, Raffaele
Ambrosino, Roberto
Arter, Wayne
Bonifetto, Roberto
Calabrò, G. 
De Luca, Riccardo
Grazia, Luigi E.Di
Fable, Emiliano
Fanelli, Pierluigi 
Fanni, Alessandra
Firdaouss, Mehdi
Gerardin, Jonathan
Lombroni, Riccardo
Mattei, Massimiliano
Moscheni, Matteo
Morris, William
Pautasso, Gabriella
Pestchanyi, Sergey
Ramogida, Giuseppe
Richiusa, Maria Lorena
Sias, Giuliana
Subba, Fabio
Villone, Fabio
You, Jeong Ha
Vizvary, Zsolt
Journal: FUSION ENGINEERING AND DESIGN 
Issue Date: 2022
Abstract: 
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.
URI: http://hdl.handle.net/2067/47297
ISSN: 0920-3796
DOI: 10.1016/j.fusengdes.2022.113067
Appears in Collections:A1. Articolo in rivista

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