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...
Main Authors: | , , , , , , , |
---|---|
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 |
id |
doaj-1130bb8aba7446bc9f9073cf3c81f330 |
---|---|
record_format |
Article |
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 |
work_keys_str_mv |
AT mmoscheni radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions AT mcarr radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions AT sdulla radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions AT fmaviglia radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions AT ameakins radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions AT gfnallo radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions AT fsubba radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions AT rzanino radiativeheatloaddistributionontheeudemofirstwallduetomitigateddisruptions |
_version_ |
1724377723497873408 |