DEMO design using the SYCOMORE system code: Influence of technological constraints on the reactor performances

Reux, C.; Kahn, S. J.; Zani, L.; Pégouriè, B.; Piot, N.; Owsiak, M.; Aiello, G.; Artaud, J.F.; Boutry, A.; Dardour, Saied; Gallo, L. Di; Duchateau, J.L.; Galassi, D.; Imbeaux, F.; Jaboulay, Jean-Charles; Magaud, Philippe; Said, J.; Saoutic, B.; Sardain, P.

doi:10.1016/j.fusengdes.2018.05.059

Cited by 12 publications

(9 citation statements)

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“…Technological issues are surely among the important ones, either regarding thermal and neutron loads on divertor and plasma wall materials, respectively [12,28], or the maximum magnetic field which can be delivered by industrial-type super-conductors [10]. In that respect, an effort is devoted to explore the impact on the design of DEMO -the possible successor of ITER on the route towards a fusion power plant [12] -of uncertainties regarding both critical engineering parameters [4,27] and that of the tritium cycle [3]. Regarding plasma physics issues, the route to fusion energy using magnetic confinement is paved with experimental findings, in particular via scaling laws.…”

Section: Introductionmentioning

confidence: 99%

Impact of scaling laws on tokamak reactor dimensioning

et al. 2019

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A simple and comprehensive method is derived and used to quantify the impact of scaling laws on tokamak reactor dimensioning. Assuming prescribed geometrical coefficients, we find the ensemble of possible triplets R, B and normalized beta β N which allow one to reach target fusion gain Q and fusion power P fus , at arbitrary Greenwald fraction. The model is generic and derived for any scaling law of the energy confinement time. Using the IPB98(y,2) scaling law [ITER Physics Basis Expert Groups on Confinement and Transport and Confinement Modelling and Database, ITER Physics Basis Editors 1999 Nucl. Fusion 39 2175] leads to ITER specifications, as expected. The recently proposed new scaling law for H-mode plasmas (DS03, [A.C.C. Sips et al. 2018 Nucl. Fusion 58 126010]) is shown to lead to modest changes to the dimensioning, except for B which could be significantly smaller for the same target performance. The impact on the dimensioning of critical exponents of the scaling law-both regarding engineer and dimensionless variables-is assessed, pushing for their determination with refined accuracy. Finally, the method is applied to a DEMOlike machine. The DS03 scaling law is found to have favorable consequences on the dimensioning as compared to IPB98(y,2), provided one is able to operate at larger β N , which can reveal challenging in a reactor aiming at zero disruption. Importantly, the opposite scaling of both scaling laws with respect to the aspect ratio are shown to have significant consequences on the optimal choice of this critical parameter.

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Section: Introductionmentioning

confidence: 99%

Impact of scaling laws on tokamak reactor dimensioning

et al. 2019

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“…System codes (see for example [6][7][8]) representing the full DEMO power plant, are currently being used in Europe to underpin DEMO design studies to find meaningful design points [9]. For DEMO, these codes have been used to find solutions with a minimum tokamak size.…”

Section: Demo Design Point Studiesmentioning

confidence: 99%

Overview of the DEMO staged design approach in Europe

Federici¹,

Bachmann²,

et al. 2019

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This paper describes the status of the pre-conceptual design activities in Europe to advance the technical basis of the design of a DEMOnstration Fusion Power Plant (DEMO) to come in operation around the middle of this century with the main aims of demonstrating the production of few hundred MWs of net electricity, the feasibility of operation with a closedtritium fuel cycle, and maintenance systems capable of achieving adequate plant availability. This is expected to benefit as much as possible from the ITER experience, in terms of design, licensing, and construction. Emphasis is on an integrated design approach, based on system engineering, which provides a clear path for urgent R&D and addresses the main design integration issues by taking account critical systems interdependencies and inherent uncertainties of important design assumptions (physics and technology). A design readiness evaluation, together with a technology maturation and down selection strategy are planned through structured and transparent Gate Reviews. By embedding industry experience in the design from the beginning it will ensure that early attention is given to technology readiness and industrial feasibility, costs, maintenance, power conversion, nuclear safety and licensing aspects.

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“…System codes (see Kovari et al, 2014;Kovari et al, 2016;Reux et al, 2018) for the full DEMO power plant are being used in Europe to underpin DEMO design studies and find meaningful design points (Kemp et al, 2018). These codes are used to find solutions with a minimum major radius, which is a rough proxy for the cost of the device.…”

Section: Parametersmentioning

confidence: 99%