Infrared detection of tungsten cracking on actively cooled ITER-like component during high power experiment in WEST

Tichit, Q.; Durif, A.; Gaspar, J.; Anquetin, Y.; Corre, Y.; Diez, M.; Dubus, L.; Firdaouss, M.; Gerardin, J.; Grosjean, A.; Gunn, J.P.; Krieger, K.; Missirlian, M.; Ratynskaia, S.; Reilhac, P.; Richou, M.; Rigollet, F.

doi:10.1016/j.nme.2023.101537

Cited by 3 publications

(1 citation statement)

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“…Naturally, these quantities are all dictated by the plasma heat loads and the PFC exposure scenarios. Thus far, rather limited modelling insight [20][21][22] and sparse tokamak evidence [5,7,23,24] are available. There has been no systematic study dedicated to near-gap melt transport that addresses practical aspects of this problem: (1) the reliability of the deformation profile predictions of macroscopic melt motion simulations, with codes such as MEMENTO [9,25], which ignore the presence of gaps.…”

Section: Introductionmentioning

confidence: 99%

Metallic melt transport across castellated tiles

Ratynskaia,

Paschalidis,

Krieger

et al. 2024

Nucl. Fusion

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In future fusion reactors, extended melt pools in combination with strong plasma-induced accelerations, suggest that metallic melt could reach the gaps between castellated plasma-facing components, potentially accompanied by profound changes in their mechanical response. The first results of a combined experimental and modelling effort to elucidate the physics of melt transport across gaps are presented. Transient melting of specially designed tungsten samples featuring toroidal gaps has been achieved in ASDEX Upgrade providing direct evidence of gap bridging. Detailed modelling with the MEMENTO melt dynamics code is reported. Empirical evidence and simulations reveal that the presence of gaps can be safely ignored in macroscopic melt motion predictions as well as that the re-solidification limited melt spreading facilitates gap bridging and leads to poor melt attachment. The findings are discussed in the context of ITER and DEMO.

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