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

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 (∼1-2MW/m2) can be largely exc...

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Main Authors: M. Moscheni, M. Carr, S. Dulla, F. Maviglia, A. Meakins, G.F. Nallo, F. Subba, R. Zanino
Format: Article
Language:English
Published: Elsevier 2020-12-01
Series:Nuclear Materials and Energy
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2352179120300971
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spelling doaj-1130bb8aba7446bc9f9073cf3c81f3302020-12-19T05:07:49ZengElsevierNuclear Materials and Energy2352-17912020-12-0125100824Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptionsM. Moscheni0M. Carr1S. Dulla2F. Maviglia3A. Meakins4G.F. Nallo5F. Subba6R. Zanino7NEMO Group, Dipartimento Energia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy; Corresponding author.Luffy AI, Culham Science Centre, Abingdon OX14 3DB, United KingdomEUROFusion PMU, Boltzmannstrasse 2, Garching bei Munchen, GermanyEUROFusion PMU, Boltzmannstrasse 2, Garching bei Munchen, GermanyLuffy AI, Culham Science Centre, Abingdon OX14 3DB, United KingdomNEMO Group, Dipartimento Energia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyNEMO Group, Dipartimento Energia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyNEMO Group, Dipartimento Energia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, ItalyThe 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 (∼1-2MW/m2) 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 ∼490MW/m2 on the PFCs, which is ∼25% lower than previous estimates.http://www.sciencedirect.com/science/article/pii/S2352179120300971Nuclear fusionEU-DEMODisruption mitigationMonte CarloRadiative loadFirst wall
collection DOAJ
language English
format Article
sources DOAJ
author M. Moscheni
M. Carr
S. Dulla
F. Maviglia
A. Meakins
G.F. Nallo
F. Subba
R. Zanino
spellingShingle M. Moscheni
M. Carr
S. Dulla
F. Maviglia
A. Meakins
G.F. Nallo
F. Subba
R. Zanino
Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions
Nuclear Materials and Energy
Nuclear fusion
EU-DEMO
Disruption mitigation
Monte Carlo
Radiative load
First wall
author_facet M. Moscheni
M. Carr
S. Dulla
F. Maviglia
A. Meakins
G.F. Nallo
F. Subba
R. Zanino
author_sort M. Moscheni
title Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions
title_short Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions
title_full Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions
title_fullStr Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions
title_full_unstemmed Radiative heat load distribution on the EU-DEMO first wall due to mitigated disruptions
title_sort radiative heat load distribution on the eu-demo first wall due to mitigated disruptions
publisher Elsevier
series Nuclear Materials and Energy
issn 2352-1791
publishDate 2020-12-01
description 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 (∼1-2MW/m2) 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 ∼490MW/m2 on the PFCs, which is ∼25% lower than previous estimates.
topic Nuclear fusion
EU-DEMO
Disruption mitigation
Monte Carlo
Radiative load
First wall
url http://www.sciencedirect.com/science/article/pii/S2352179120300971
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