Status of the EU DEMO breeding blanket manufacturing R&amp;D activities

Forest, Laurent; Aktaa, Jarir; Boccaccini, Lorenzo Virgilio; Emmerich, Thomas; Eugen-ghidersa, Bradut; Fondant, Gilles; Froio, Antonio; Puma, A. Li; Namburi, Hygreeva Kiran; Neuberger, Heiko; Rey, J.; Savoldi, Laura; Sornin, Denis; Vála, L.

doi:10.1016/j.fusengdes.2019.111420

Cited by 14 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the collaboration of an industrial partner, a preliminary manufacturing sequence including machining, welding and NDT steps is proposed. The preliminary assessment takes into account know-how on Eurofer manufacturing and assembly technologies assessed of the ITER TBMs (Test Blanket Modules) [7], [8], [9] and [10] and the DEMO BB (Breeding Blanket) [11], [12] and [13]. Two main routes are envisaged:…”

Section: Shielding Linermentioning

confidence: 99%

Eurofusion-DEMO Divertor - Cassette Design and Integration

Mazzone

You

Bachmann³

et al. 2020

Fusion Engineering and Design

Self Cite

View full text Add to dashboard Cite

The Eurofusion-DEMO design will complete the Pre Conceptual Design phase (PCD) with a PCD Gate, named G1, scheduled to take place in Q4 2020 that will focus on assessing the feasibility of the plant and its main components prior to entering into the Conceptual Design phase. In the paper first an overview is given of the Eurofusion-DEMO Divertor Assembly including design and interface description, systems and functional requirements, load specification, system classification, manufacturing procedures and cost estimate. Then critical issues are discussed and potential design solutions are proposed, e.g.: -Neutron material damage limits of the different (structural) materials present in the divertor assembly (as CuCrZr, Eurofer) and in the vacuum vessel (AISI 316L(N)-IG); -Temperature hot spots in parts of the divertor assembly exposed to high nuclear heating and high heat radiation (from the plasma core or the separatrix) causing difficulties for active or passive cooling (e.g. cassette body structure, liner support structures, mechanical supports, divertor toroidal rails); -Arrangement and design of plasma-facing components and liner with pumping slot in the divertor cassette to enable pumping of exhaust gases from the lower port.

show abstract

Section: Shielding Linermentioning

confidence: 99%

Eurofusion-DEMO Divertor - Cassette Design and Integration

Mazzone

You

Bachmann³

et al. 2020

Fusion Engineering and Design

Self Cite

View full text Add to dashboard Cite

show abstract

“…Liquid metals as used in tritium breeding or cooling would circulate in all kinds of pipes and ducts for different blanket designs such as the water cooled, helium cooled lead lithium blankets (Forest et al. 2020; Ling & Wang 2020) and the dual coolant lead lithium blanket (Smolentsev et al. 2015).…”

Section: Introductionmentioning

confidence: 99%

Linear instability and nonlinear flow states in a horizontal pipe flow under bottom heating and transverse magnetic field

Song

2022

J. Fluid Mech.

View full text Add to dashboard Cite

Linear stabilities of the liquid metal mixed convection in a horizontal pipe under bottom heating and transverse magnetic field are studied through linear global stability analyses. Three branches of the linear stability boundary curves are determined by the eigenvalue computation of the most unstable modes. One branch is located in the region of large Hartmann number and determined by the linear unstable mode which was first revealed by the numerical simulations of Zikanov, Listratov & Sviridov (J. Fluid Mech., vol. 720, 2013, pp. 486–516). This branch curve shows that the global unstable mode exists above a threshold of Hartmann number, which agrees with the experiment of Genin et al. (Temperature fluctuations in a heated horizontal tube affected by transverse magnetic field. In Proc. 8th PAMIR Conf. Fund. Appl. MHD, Borgo, Corsica, France, pp. 37–41, 2011). The other two branch curves determined by two different long-wave unstable modes intersect with each other in the region of small Hartmann number. The critical Grashof number on these two curves increases exponentially with the increase of the Hartmann number. Through energy budget analyses at the critical thresholds of these unstable modes, it is found that, for the unstable mode at large Hartmann numbers, buoyancy is the dominant destabilizing term which demonstrates the hypothetical explanation of Zikanov et al. (2013) who regard natural convection as a destabilization mechanism. It is further revealed that, with respect to the unstable modes on the critical stability curves of small Hartmann numbers, the dominant destabilization comes from the streamwise shear of the basic flow. Finally, within the linear unstable region, fully developed nonlinear flow states of the mixed convection are investigated by direct numerical simulations (DNS) with several sets of selected dimensionless parameters. The spatio-temporal structures of these nonlinear flow states are discussed in detail with comparison with the linear unstable global modes.

show abstract

“…The water-cooled lithium-lead blanket concept (Fig. 1) is one of the leading candidates for DEMO's FW [8].…”

mentioning

confidence: 99%

“…This has been attributed to the high matrix carbon content of the welded region caused by carbide dissolution during the period of high temperature [14]. This cracking susceptibility has prompted interest in the use of electron beam welding (EBW) and laser welding techniques for these materials, which produce smaller weld regions that are more readily subjected to post-weld heat treatment (PWHT) [8,15]. Laser keyhole welding (LKW) is presently considered the preferred joining technique for the fabrication of the DEMO WCLL, due to its lower levels of induced deformation, smaller fusion/heat-affected zones, and ability to join thick sections in one pass [16].…”

mentioning

confidence: 99%