Theory and modelling activities in support of the ITER disruption mitigation system

E Nardon (1, 2) , G Huijsmans (2) , Y Peysson (2) , C Reux (2) , A Matsuyama (3) , M Lehnen (4) , P Aleynikov (5) , F J Artola (6) , V Bandaru (6) , M Hoelzl (6) , G Papp (6) , O Bardsley (7) , M Kong (7) , M Beidler (8) , D Del-Castillo-Negrete (8) , D Spong (8) , Daniele Bonfiglio (9) , A Boozer (10) , C Paz-Soldan (10) , B Breizman (11) , D Kiramov (11) , D Brennan (12) , N Ferraro (12) , S Jardin (12) , C Liu (12) , N. Garland (13) , X. Tang (13) , J. Decker (14) , C. Sommariva (14) , O Embreus (15) , R. Harvey (16) , D Hu (17) , V. Izzo (18) , C. Kim (19) , S Konovalov (20) , L Lao (21) , Y Liu (21) , B Lyons (21) , J Mcclenaghan (21) , P Parks (21) , S J Lee (22) , J R Martín-Solís (23) , C Mcdevitt (24) , R Samulyak (25) , H. Strauss (26)

1 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
2 IRFM - Institut de Recherche sur la Fusion par confinement Magnétique
3 QST - National Institutes for Quantum and Radiological Science and Technology
4 ITER - ITER organization
5 IPP-MPG - Max Planck Institute for Plasma physics
6 IPP - Max-Planck-Institut für Plasmaphysik [Garching]
7 Culham Science Centre [Abingdon]
8 ORNL - Oak Ridge National Laboratory [Oak Ridge]
9 Consorzio RFX - Ricerca Formazione Innovazione
10 Columbia University [New York]
11 Institute for Fusion Studies
12 PPPL - Princeton Plasma Physics Laboratory
13 Theoretical Division [LANL]
14 SPC - Swiss Plasma Center
15 Chalmers University of Technology [Göteborg]
16 CompX
17 BUAA - Beihang University
18 UC San Diego - University of California [San Diego]
19 SLS2 Consulting (San Diego)
20 NRC KI - National Research Centre "Kurchakov Institute"
21 General Atomics [San Diego]
22 SNU - Seoul National University [Seoul]
23 UC3M - Universidad Carlos III de Madrid [Madrid]
24 Florida A&M University
25 SBU - Stony Brook University [SUNY]
26 HRS Fusion

In 2018, an international Task Force (TF) dedicated to the ITER Disruption Mitigation System (DMS) has been formed. The present paper summarizes Theory and Modelling (T&M) activities performed within this TF. The ITER DMS is planned to rely on Shattered Pellet Injection (SPI). The most critical issue, at present, is that of Runaway Electrons (REs). Indeed, recent T&M work suggests that previously envisaged means of RE avoidance or mitigation may prove inefficient. However, RE simulations have not yet taken into account the possibly beneficial role of magnetohydrodynamic (MHD) instabilities. Furthermore, new promising schemes for RE avoidance or mitigation are being investigated. These comprise, among others: 1) a prompt plasma dilution before the disruption by means of pure H2 SPI in order to suppress hot tail RE generation, and 2) should a RE beam form, a "cleanout" of the beam's companion plasma, via (again) pure H2 SPI into the beam, which may lead to a benign beam termination. The paper also discusses the status of 3D MHD modelling. The JOREK, M3D-C 1 and NIMROD codes have been extended in recent years to be able to simulate SPI. Good cooperation exists between

Domains: Physics [physics]; Physics [physics]; Plasma Physics [physics.plasm-ph]

E Nardon, G Huijsmans, Y Peysson, C Reux, A Matsuyama, et al.. Theory and modelling activities in support of the ITER disruption mitigation system. IAEA FEC 2021 - The 28th IAEA Fusion Energy Conference, May 2021, Nice (Virtual conference), France. ⟨cea-03253650⟩