Enhancing the DEMO divertor target by interlayer engineering

Barrett, T.; McIntosh, S.; Fursdon, M.; Hancock, David; Timmis, William; Coleman, M.; Rieth, M.; Reiser, J.

doi:10.1016/j.fusengdes.2015.03.031

Cited by 30 publications

(21 citation statements)

References 2 publications

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“…The preliminary results presented here suggest that the conductivity of FeltMetal is close to that required by the optimised design in [2]. In addition, the Young's modulus reported in [3] also matches the ideal value of ∼1 GPa for the Thermal Break concept.…”

Section: Additional Measurements Using Feltmetalsupporting

confidence: 71%

Testing candidate interlayers for an enhanced water-cooled divertor target

Hancock

Barrett

Foster

et al. 2015

Fusion Engineering and Design

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Section: Additional Measurements Using Feltmetalsupporting

confidence: 71%

Testing candidate interlayers for an enhanced water-cooled divertor target

Hancock

Barrett

Foster

et al. 2015

Fusion Engineering and Design

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“…Here, MEAP results for the Thermal Break concept are compared with an ITER-like design. The concept of a Thermal Break divertor target was introduced in [19]. A CuCrZr structural pipe and W monoblock armour are used, but the interlayer between these is a relatively low conductivity and very low stiffness material or matrix.…”

Section: Current Pfc Design Concepts and Supporting Analyses 41 Divementioning

confidence: 99%

“…Using such an interlayer reduces the difference in strain between the structure and armour and significantly reduces the stress transmitted between them. In previous work it was shown that the very high compliance is more important for reducing structural stress than the low thermal conductivity [19]; however, the latter may play a vital role in heat redistribution around the pipe which can reduce the pipe peak temperature and heat flux.…”

Section: Current Pfc Design Concepts and Supporting Analyses 41 Divementioning

confidence: 99%

“…Of course, this is a simple comparison of just two design variants with nominal geometry and further optimisation is required for each in isolation (akin to [19]). The thermal break concept is untried, and requires a programme of fabrication R&D and testing.…”

Section: Current Pfc Design Concepts and Supporting Analyses 41 Divementioning

confidence: 99%

“…The thermal break concept is untried, and requires a programme of fabrication R&D and testing. Potential practical solutions for a thermal break interlayer are copper felt or foam; these materials are currently being evaluated but appear to have properties in the range of interest [19]. Also, while the concept shows good potential, what remains is to devise the best way to rigidly support the PFC structure and armour while including between them a thermal and structural break.…”

Section: Current Pfc Design Concepts and Supporting Analyses 41 Divementioning

confidence: 99%

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Progress in the engineering design and assessment of the European DEMO first wall and divertor plasma facing components

Barrett

Ellwood

Pérez

et al. 2016

Fusion Engineering and Design

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The European DEMO power reactor is currently under conceptual design within the EUROfusion Consortium. One of the most critical activities is the engineering of the plasma-facing components (PFCs) covering the plasma chamber wall, which must operate reliably in an extreme environment of neutron irradiation and surface heat and particle flux, while also allowing sufficient neutron transmission to the tritium breeding blankets. A systems approach using advanced numerical analysis is vital to realising viable solutions for these first wall and divertor PFCs. Here, we present the system requirements and describe bespoke thermo-mechanical and thermo-hydraulic assessment procedures which have been used as tools for design. The current first wall and divertor designs are overviewed along with supporting analyses. The PFC solutions employed will necessarily vary around the wall, depending on local conditions, and must be designed in an integrated manner by analysis and physical testing.

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