Impact of W on scenario simulations for ITER

TitleImpact of W on scenario simulations for ITER
Publication TypeJournal Article
Year of Publication2015
AuthorsG.MD Hogeweij, V. Leonov, J. Schweinzer, A.C.C. Sips, C. Angioni, G. Calabro, R. Dux, A. Kallenbach, E. Lerche, C. Maggi, T. Putterich, ITPAIntegrated group, ASDEX Upgrade Team, JET Contributors
JournalNuclear Fusion
Volume55
Issue6
Pagination063031
Abstract

In preparation of ITER operation, large machines have replaced their wall and divertor material to W (ASDEX Upgrade) or a combination of Be for the wall and W for the divertor (JET). Operation in these machines has shown that the influx of W can have a significant impact on the discharge evolution, which has made modelling of this impact for ITER an urgent task. This paper reports on such modelling efforts. Maximum tolerable W concentrations have been determined for various scenarios, both for the current ramp-up and flat-top phase. Results of two independent methods are presented, based on the codes ZIMPUR plus ASTRA and CRONOS, respectively. Both methods have been tested and benchmarked against ITER-like I p RU experiments at JET. It is found that W significantly disturbs the discharge evolution when the W concentration approaches ∼10 −4 ; this critical level varies somewhat between scenarios.

DOI10.1088/0029-5515/55/6/063031
Division

FP

Department

CPP-HT

PID

d8553e78fee23a346493abe41c17a811

Alternate TitleNucl. Fusion

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