Physics model development and extensive validation of predictive integrated modelling within the EU framework programme 2021-2027

To prepare ITER operation and contribute to DEMO design, a cohesive plan to extend predictive integrated simulation, and validation methodologies, has been endorsed by EUROfusion under the acronym of TSVV11 (Theory, Simulation, Validation and Verification task on ‘Validated frameworks for the Reliable Prediction of Plasma Performance and Operational Limits in Tokamaks).

One of the guiding principles is to align with ITER technical choices. Hence we apply and further develop the High Fidelity Pulse Simulator, driven by a Python workflow coupling IMAS-compatible components such as JINTRAC (JETTO+EDGE2D) and the H/CD workflow.

We also aim at improving advanced physics modules. Presently the focus is on Ip ramp up. Given the impact of light impurities on the resistivity profile, turbulent impurity transport predictions by TGLF and QuaLiKiz are validated against higher-fidelity codes such as GKW. Resistive MHD stability is also integrated in the workflow. Ip ramp up of AUG, JET, TCV and WEST are predictively modelled and compared to the experiments.

To extensively validate the HFPS predictions, we present initial work on automated VVUQ pipelines for 0D quantities such as internal inductance, energy content, loop voltage against experimental IMAS data from 4 different EU tokamaks.