Integrated design strategy for EU-DEMO first wall protection from plasma transients

0565762 - ÚFP 2023 RIV CH eng J - Journal Article
Maviglia, F. - Bachmann, C. - Federici, G. - Franke, T. - Siccinio, M. - Albanese, R. - Ambrosino, R. - Arter, W. - Bonifetto, R. - Calabrò, G. - De Luca, R. - Grazia, L. E.Di. - Fable, E. - Fanelli, P. - Fanni, A. - Firdaouss, M. - Gerardin, Jonathan - Lombroni, R. - Mattei, M. - Moscheni, M. - Morris, W. - Pautasso, G. - Pestchanyi, S. - Ramogida, G. - Richiusa, M. - Sias, G. - Subba, F. - Villone, F. - You, J.H. - Vizvary, Z.
Integrated design strategy for EU-DEMO first wall protection from plasma transients.
Fusion Engineering and Design. Roč. 177, April (2022), č. článku 113067. ISSN 0920-3796. E-ISSN 1873-7196
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : demo * Discrete limiters * Electromagnetic simulations * First wall load * Plasma scenario optimization * Plasma transients
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.7, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0920379622000679?via%3Dihub

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.
Permanent Link: https://hdl.handle.net/11104/0337270