Requirements for the EUCLID-F Integral Code for the Deterministic Analysis of Accidents in Fusion Reactors.

Justification of fusion reactor safety is impossible without multiphysics codes that make it possible to model many coupled physical and chemical phenomena. Currently, multimodule integral codes for modeling fusion reactors are actively developed abroad, but there are no such codes in Russia. In this article, the requirements for the EUCLID-F integral code, its modular structure, and the list of modeled phenomena are formulated. The code is developed at the Nuclear Safety Institute of the Russian Academy of Sciences in order to analyze accidents at fusion reactors with magnetic plasma confinement. The design features, hazards, and emergency modes of fusion reactors are briefly described, and a comparison of the EUCLID-F code with foreign counterparts is given. In addition, the requirements for the unified database and high-fidelity codes necessary for development and performance of calculations by the integral code are formulated. Taking into account the described requirements when developing the integral code will make it possible to use it for analyzing the majority of design and beyond design basis accident scenarios. The code developed in accordance with the above requirements will significantly surpass foreign counterparts in terms of the number and variety of calculation modules and simulated phenomena. The availability of this code in Russia will significantly contribute to the development of fusion technologies. [ABSTRACT FROM AUTHOR]