Abstract

The FC-FNS fuel cycle model is used to calculate the hydrogen isotope flows in the fuel systems of a tokamak-based fusion neutron source (DEMO-FNS) with parameters R/a = 3.2 m/(L m), B = 5 T, I_p = 4–5 МА, P_NBI = 30 MW, P_ECR = 6 MW, and DT fusion power P_fus = 40 MW. The FC-FNS (Fuel Cycle for Fusion Neutron Source) model has been significantly upgraded. For the first time, a joint simulation of gas, solid-state, and plasma flows of fuel mixtures in the regions of core and divertor plasma with the injection of neon impurity into the divertors was carried out. The possibility of reducing the fuel flows in the pumping and injection systems with the use of Ne impurity in the divertor has been substantiated. For the previously accepted scenarios of the D⁰ + T⁰ and D⁰ heating beam, the tritium inventories in the fuel systems were calculated taking into account the T breeding and burnup at a different T/D (f_T) ratio in the core plasma. It was shown that, for the D + T beam, it is advisable use f_T = 0.5, and for the D beam, it is more expedient to use f_T = 0.6–0.7. The fuel injection was fundamentally revised. The main fueling method is injection of fuel pellets, which is now represented by separate D₂, T₂, and DT injectors and carried out from HFS and LFS. The DEMO-FNS injection system operating modes were analyzed as a function of the core parameters, and the gas flows were evaluated for various D₂/T₂/DT pellet-injector modes. The results obtained have allowed us to choose the fuel system configuration with the minimum tritium inventory (<2 kg) and the lowest reprocessing time.

中文翻译：

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演示-FNS混合设施的喷射系统中燃料流的仿真，其中涉及堆芯和分流器等离子的耦合建模

摘要

FC-FNS燃料循环模型用于计算基于托卡马克的聚变中子源（DEMO-FNS）的燃料系统中的氢同位素流量，其参数R / a = 3.2 m /（L m），B = 5 T ，I _p  = 4-5МА，P _NBI = 30 MW，P _ECR = 6 MW，DT聚变功率P _fus= 40兆瓦。FC-FNS（聚变中子源燃料循环）模型已得到重大升级。首次进行了在堆芯和偏滤器等离子体区域内的燃料混合物的气体，固态和等离子体流的联合模拟，其中向滤清器中注入了氖气杂质。已经证实了通过在分流器中使用Ne杂质来减少泵送系统和喷射系统中的燃料流量的可能性。对于D ⁰ + T ⁰和D ⁰加热束的先前接受的情况，考虑到在不同的T / D（f _T）在核心等离子体中的比率。结果表明，对于D + T光束，建议使用f _T = 0.5，而对于D光束，更方便的是使用f _T = 0.6–0.7。从根本上修改了燃油喷射。主要的加油方法是燃料芯块的喷射，现在由独立的D ₂，T ₂和DT喷射器表示，由HFS和LFS进行。根据核心参数对DEMO-FNS喷射系统的运行模式进行了分析，并对各种D ₂ / T ₂的气体流量进行了评估/ DT颗粒注入器模式。获得的结果使我们能够选择with存量最少（<2 kg）且后处理时间最少的燃料系统配置。