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Description
ITER will be a major step towards demonstrating the scientific and technological feasibility of nuclear fusion as a clean and safe energy source. It will operate the largest Tokamak ever built. The radiation fields expected in ITER, both during and after operation, make nuclear analyses particularly valuable. Some of these analyses are expected to support the update of ITER Rapport Préliminaire de Sûreté (RPrS), the safety report periodically updated and reviewed by the French Nuclear Safety Authority (ASNR). The generation of 3D radiation maps is expected to significantly support the demonstration of ITER’s compliance with the French radiological safety regulations, aimed at protecting workers and the public.
In this work, we present the Best Estimate (BE) ITER Mode-0 Radiation Maps that provide the radiation levels (neutron flux, photon flux, biological dose rate, absorbed dose in silicon, etc) inside the Tokamak Complex during machine operation. Both the plasma and the Tokamak Cooling Water System (TCWS) activated water were the radiation sources considered.
These radiation maps represent a significant upgrade in terms of robustness with respect to previous releases. They are the first ones calculated in a single MCNP model of the whole ITER facility, the BE ITER full model. This model represents the tokamak and the site buildings, avoiding the previously existing need of coupling separate models through intermediate radiation sources that introduced unassessed uncertainties in the results. In addition, the TCWS activated water source was updated in accordance with its latest design.
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