Shattered pellet injection (SPI) is the technology chosen for the ITER Disruption Mitigation System and is explored at several fusion research devices, like DIII-D and JET and J-TEXT. The ITER disruption mitigation strategy relies on multiple injections to achieve RE (runaway electron) avoidance with optimum TQ (thermal quench), CQ (current quench) durations to adequately reduce wall loads. To demonstrate the feasibility of the multiple injection and to extrapolate to ITER, experiments with two identical injectors toroidally opposite to each other are needed urgently.

KSTAR (Korea Superconducting Tokamak Advanced Research) can be a unique testbed to study the plasma disruption mitigation for ITER. KSTAR has installed two identical injectors in 180 degrees of toroidal opposite positions in 2019. For this system, ORNL (Oak Ridge National Laboratory) provided the two injectors, the shatter tubes, and auxiliary systems. NFRI (National Fusion Research Institute) provided the infrastructure of a vacuum pumping system, control & data acquisition system, and installed additional diagnostic systems for SPI in collaboration with the ITER Organization. This paper describes the engineering achievements during installation on KSTAR and the initial results of single and multiple SPI experiments in the 2019 campaign.

破碎颗粒注射（SPI）是ITER干扰缓解系统选择的技术，并在DIII-D和JET和J-TEXT等融合研究设备中得到了探索。ITER干扰缓解策略依靠多次注入来实现RE（失控电子）避免，同时具有最佳TQ（热猝灭）和CQ（电流猝灭）持续时间，以充分降低壁负载。为了证明多次进样的可行性并推断出ITER，迫切需要使用两个彼此环形相对的相同进样器进行实验。

KSTAR（韩国超导托卡马克高级研究）可以作为研究ITER缓解血浆干扰的独特试验平台。KSTAR于2019年在180度环形相对位置安装了两个相同的进样器。对于该系统，ORNL（橡树岭国家实验室）提供了两个进样器，破碎管和辅助系统。NFRI（国家融合研究所）提供了真空泵系统，控制和数据采集系统的基础架构，并与ITER组织合作为SPI安装了其他诊断系统。本文介绍了在KSTAR上安装期间的工程成就以及2019年活动中的单个和多个SPI实验的初步结果。