首页|Thermal behavior of the KSTAR tungsten cassette divertor in KSTAR 2023 campaign
Thermal behavior of the KSTAR tungsten cassette divertor in KSTAR 2023 campaign
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NETL
NSTL
Elsevier
The thermal behavior of the KSTAR Plasma-Facing Components (PFCs), with a focus on the newly installed Tungsten Cassette Divertor (TCD), was analyzed based on the results of the KSTAR 2023 campaign. Prior to the plasma experiment, an in-situ active cooling experiment was conducted to measure the flow rate of the Baking and Cooling pipelines (B&C lines) in each port, as such measurements cannot be performed during the plasma experiment. The flow rate supplied to the TCD was estimated from the in-situ experiment results and applied as the supply flow rate for subsequent Computational Fluid Dynamics (CFD) analysis. The study examined the results of the 1st baking operation, conducted to enhance the vacuum conditions; the 102-second long-pulse plasma experiment achieved in 2023; and the 2nd baking operation, performed to remove residual moisture from the B&C lines after the plasma experiment. Thermal margins were evaluated using CFD simulations for a single TCD under steady-state conditions. Additionally, to evaluate thermal performance under conservative conditions, a pump failure scenario was analyzed, confirming that temperatures remained within the design limits. The findings confirmed that sufficient thermal margin, defined by the design temperature limits of the tungsten and CuCrZr pipes, was secured during the 102-second long-pulse plasma experiment, despite minor variations in flow rates among the TCD B&C ports and the eight TCDs within the same port. In conclusion, the TCD effectively dissipates plasma heat loads under steady-state conditions comparable to those of this long-pulse experiment.
Kim, Koung Moon、Ahn, Hee-Jae、Kim, Young Ok、Kim, Hyunseok、Lee, Hyungho、Kwon, Sungjin、Park, Soo-hyeon、Lee, Hyunmyung、Song, Jae-in、Joung, Nam-young、Kim, Kwangpyo、Park, Kaprai、Park, Young Min
NETL
NSTL
Elsevier
