ITER is the flagship fusion project, conceived as an experiment to select and develop the technologies for the first demonstration reactor, DEMO. Nuclear analysis is a core discipline in support of the design, commissioning and operation of the machine. To date, it has been conducted with increasingly detailed partial models, which represented toroidal segments of the tokamak. However, the limitations of this methodology became evident as estimates of quantities relevant to design, safety and operation showed unquantifiable uncertainties, which is a risk. Here, we present a detailed and realistic 360° MCNP model of the ITER tokamak called E-lite. We demonstrate the model’s usability and practicality. Two examples are used to illustrate qualitatively and quantitatively how it solves previously intractable problems with marked benefits for the future nuclear analysis of ITER, with applications to DEMO and future reactors. E-lite constitutes a milestone in the field of nuclear analysis in terms of realism in the evaluation of key quantities.

ITER 是旗舰聚变项目，旨在为第一个示范反应堆 DEMO 选择和开发技术。核分析是支持机器设计、调试和操作的核心学科。迄今为止，它已经使用越来越详细的部分模型进行了，这些模型代表了托卡马克的环形部分。然而，这种方法的局限性变得明显，因为与设计、安全和运行相关的数量估计显示出无法量化的不确定性，这是一种风险。在这里，我们展示了一个详细而逼真的 ITER 托卡马克 360° MCNP 模型，称为 E-lite。我们展示了模型的可用性和实用性。两个例子用于定性和定量地说明它如何解决以前难以解决的问题，并为 ITER 未来的核分析带来显着的好处，并应用于 DEMO 和未来的反应堆。E-lite 在关键量评估的现实性方面构成了核分析领域的一个里程碑。