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Investigation of pressure wave propagation under In-box LOCA scenario in the test blanket module for the CFETR COOL blanket
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DOI：10.1016/j.net.2026.104542.png)
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Abstract
En 中文
The supercritical CO2 cOoled Lithium-lead (COOL) blanket is considered as one of the advanced blanket candidates for the Chinese Fusion Engineering Test Reactor (CFETR). The COOL Test Blanket Module (TBM) is designed based for the CFETR COOL blanket. The tritium breeding technology of the COOL blanket will be tested using the COOL TBM in the Chinese fusion test facility BEST. The COOL TBM employs the same material and similar structure with the CFETR COOL blanket to maintain relevance. In-box Loss-of-Coolant Accident (LOCA) is one of the most serious accidents of the TBM. Under the LOCA scenario in the COOL TBM, the leakage of 8 MPa S-CO2 into the lithium-lead breeding zone generates intense localized pressure spikes, posing a severe threat to the structural integrity of the TBM. In this paper, the in-box LOCA is simulated using CFD methods to examine pressure-wave propagation inside the TBM and to investigate the influence of rupture size, rupture location, and lithium-lead initial pressure on the post-LOCA pressure distribution. The computational results indicate that the peak pressure can reach 12.5 MPa after the LOCA, which presents a significant challenge to the structural integrity of the blanket.
Keywords:
COOL TBM
In-box LOCA
Pressure wave
CFD
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