#240
Modeling of RE-induced damage in tungsten plasma-facing components
Oral
Svetlana Ratynskaia (KTH Royal Institute of Technology)
T. Rizzi, P. Tolias, A. Kulachenko, A. Kavroulakis, M. Tatarakis, E. Kaselouris, V. Dimitriou, Y. Corre, C. Reux, M. Diez, E. Gauthier, J. Gerardin, M. Firdaouss, T. Batal, M. Hoelzl, R.A. Pitts, J. Artola
Abstract
Controlled DIII-D experiments on RE-induced damage in ATJ graphite have been successfully modeled by a novel multi-physics work-flow capable of describing the thermo-mechanical response of brittle sublimating PFCs [1], including the fragmentation stage and the debris expulsion stage [2]. For tungsten, the progress has, thus far, been restricted to the modelling of volumetric energy deposition and the pure thermal response [3], with a newly developed JOREK-Geant4-MEMENTO work-flow being employed for predictions in ITER [4]. The problem of the full thermo-mechanical response of tungsten (W) to REs is far more challenging, since W features a liquid phase and has a high temperature ductile behavior [3]. In this presentation we discuss current developments in the modelling of RE-driven W PFC explosions. For empirical guidance, we rely on the first controlled experiment on RE-induced explosions of a W instrumented tile that were carried out in WEST in 2025.
[1] S. Ratynskaia, P. Tolias, T. Rizzi et al, Nucl. Fusion 65 (2025) 024002.
[2] T. Rizzi, A. Kavroulakis, S. Ratynskaia et al., Nucl. Fusion (to be submitted).
[3] S. Ratynskaia, M. Hoelzl, E. Nardon et al, 2025 Plasma Phys Control Fusion, DOI: 10.1088/1361-6587/ae1c6c
[4] S. Ratynskaia, K Paschalidis, T Rizzi et al, 2026 Plasma Phys. Control. Fusion 68 025024