Remarks on the performance of the EU DCLL breeding blanket adapted to DEMO 2017

•The most relevant aspects of the design of the European DCLL MMS design adapted to DEMO 2017 are described.•Several channels configurations have been assessed in order to select the most adequate for the whole FW.•Specific models have been created to study the impact of the change to DEMO 2017 on t...

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Bibliographic Details
Published in:Fusion engineering and design 2020-06, Vol.155, p.111559, Article 111559
Main Authors: Fernández-Berceruelo, Iván, Palermo, Iole, Urgorri, Fernando R., Rapisarda, David, Garcinuño, Belit, Ibarra, Ángel
Format: Article
Language:English
Subjects:
Blanket
DCLL
DEMO
Electric power generation
Elongation
Heat flux
Lithium
Neutron flux
Plasma physics
Shielding
Tritium
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Summary:•The most relevant aspects of the design of the European DCLL MMS design adapted to DEMO 2017 are described.•Several channels configurations have been assessed in order to select the most adequate for the whole FW.•Specific models have been created to study the impact of the change to DEMO 2017 on thermal-hydraulics at module level.•The presence of important heat flux peaks on the FW is translated into a poorer performance of the whole blanket.•The overall TBR has been kept in a significant value of 1.173. The main shielding responses are fulfilled. The capability of the breeding blanket to efficiently fulfill its main requirements: tritium breeding, power extraction and neutron shielding is strongly sensitive on the variation of the geometrical constraints imposed by plasma physics and the integration with the rest of the plant systems. Within the Power Plant Physics and Technology Programme, EUROfusion is developing a Dual-Coolant Lithium-Lead (DCLL) breeding blanket based on the multi-module segment approach. In the current DEMO reactor specification released in 2017, the outboard blanket thickness has been decreased with the aim of providing better stability to the plasma and increasing its elongation. Besides, the first wall has been shaped in order to optimize the heat flux loads from the plasma. This work describes the main aspects of the adaptation of the EU DCLL breeding blanket to the characteristics of DEMO 2017 and assesses the influence of the changes on its thermal-hydraulic and neutronic performances.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2020.111559