Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions

Moscheni, M.; Carr, M.; Dulla, S.; Maviglia, F.; Meakins, A.; Nallo, G. F.; Subba, F.; Zanino, R.

doi:10.1016/j.nme.2020.100824

The EU-DEMO First Wall (FW) will be a relatively thin structure. In order not to damage this layer, heat loads distributed onto the wall should be carefully controlled. In the case of transient events, as for example plasma disruptions, the steady-state heat load limit (~1-2 MW/m^2) can be largely exceeded for a timespan sufficiently long to cause damages. Therefore, when the control system detects an upcoming disruption, Shattered Pellet Injection (SPI) or Massive Gas Injection (MGI) mitigation techniques can be employed to inject impurities and switch off the plasma safely. In the present work, the Monte-Carlo ray-tracing code CHERAB is used to compute the radiative heat load distribution on the EU-DEMO Plasma Facing Components (PFCs) due to a mitigated plasma disruption. By applying ad-hoc techniques to improve the quality of the Monte Carlo calculation, we obtain a peak radiative load of ~490 MW/m^2 on the PFCs, which is ~25% lower than previous estimates.

Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions / Moscheni, M.; Carr, M.; Dulla, S.; Maviglia, F.; Meakins, A.; Nallo, G. F.; Subba, F.; Zanino, R.. - In: NUCLEAR MATERIALS AND ENERGY. - ISSN 2352-1791. - ELETTRONICO. - 25(2020). [10.1016/j.nme.2020.100824]

Titolo:	Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions
Autori:	MOSCHENI, MATTEO Carr, M. DULLA, SANDRA Maviglia, F. Meakins, A. NALLO, GIUSEPPE FRANCESCO SUBBA, FABIO ZANINO, ROBERTO mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2020
Rivista:	NUCLEAR MATERIALS AND ENERGY
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.nme.2020.100824
Appare nelle tipologie:	1.1 Articolo in rivista

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