Combination of helical ferritic-steel inserts and flux-tube-expansion divertor for the heat control in tokamak DEMO reactor
Combination of helical ferritic-steel inserts and flux-tube-expansion divertor for the heat control in tokamak DEMO reactor
复制标题
用于托卡马克 DEMO 反应堆热控制的螺旋铁素体钢嵌件和通量管膨胀偏滤器的组合
DOI：
10.1016/j.jnucmat.2014.12.065
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
N. Asakura
中科院分区：
文献类型：
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作者：
T. Takizuka;S. Tokunaga;K. Hoshino;K. Shimizu;N. Asakura
共振磁扰动（RMP）可以抑制托卡马克反应堆H模运行中的边缘局域模（ELMs），但在强中子通量下，RMP线圈与DEMO反应堆不兼容。我们提出了一个创新的概念，RMP没有安装线圈，但插入铁素体钢的螺旋配置。螺旋扰动场通过螺旋形铁素体钢插入件（FSI）在轴对称环向磁场中自然形成。当避免ELM时，偏滤器板上的大的固定热负荷可以通过采用通量管膨胀（FTE）偏滤器（如X偏滤器）来减少。分界面形状和偏滤器板倾角与简单的长腿偏滤器构型相似。在托卡马克DEMO反应堆中，采用螺旋型FSI和FTE偏滤器相结合的热控制方法，可以避免ELM热脉冲的产生，降低偏滤器的稳态热负荷。
Edge localized modes (ELMs) in the H-mode operation of tokamak reactors may be suppressed/mitigated by the resonant magnetic perturbation (RMP), but RMP coils are considered incompatible with DEMO reactors under the strong neutron flux. We propose an innovative concept of the RMP without installing coils but inserting ferritic steels of the helical configuration. Helically perturbed field is naturally formed in the axisymmetric toroidal field through the helical ferritic steel inserts (FSIs). When ELMs are avoided, large stationary heat load on divertor plates can be reduced by adopting a flux-tube-expansion (FTE) divertor like an X divertor. Separatrix shape and divertor-plate inclination are similar to those of a simple long-leg divertor configuration. Combination of the helical FSIs and the FTE divertor is a suitable method for the heat control to avoid transient ELM heat pulse and to reduce stationary divertor heat load in a tokamak DEMO reactor.