Keriwo breaks through 5.5-meter XCPS insulation ring, accelerating localization of fusion core compo

High-power, ultra-large-sizecross-linked polystyreneinsulation components are indispensable core parts in cutting-edge fields such as Z-pinch controlled nuclear fusion and high-power pulse accelerators. Among these, the high-voltage insulation stack of Z-pinch devices operates under harsh conditions, requiring components to withstand megavolt-level high voltage, high-intensity radiation, and adapt to long-term operation in a cross-environment of high vacuum andliquid media. The insulation ring has consistently been the most vulnerable weak link in the entire system.

For a long time, the global supply of high-end cross-linked polystyrene insulation materials has been highly concentrated. Domestic related scientific research and engineering have long faced challenges such as unstable supply, overseas regulatory restrictions, high costs, and uncontrollable delivery cycles, hindering the development progress of domestic fusion devices.

The industry generally believes that the integrated molding of large-size cross-linked polystyrene is a difficult problem. The larger the size, the higher the production difficulty. Three major pain points—poor material uniformity, unbalanced internal stress, and uncontrollable product deformation—have long plagued the domestic industry. Previously, most domestic related equipment could only use small-size components, significantly compromising engineering stability.

Kerewo Technology has deeply cultivated the field of cross-linked polystyrene materials. After years of technical research, it has successively overcome key processes such as raw material purification, segmented precise polymerization, and additive-free molding, opening up a fully domestic production chain for material formulation, raw material preparation, and mass production processing, establishing an independent and controllable material technology system.

At this stage, the company's industrialization capabilities have gradually improved: the production line forXCPS insulation ringswith diameters ranging from 1 meter to 3.5 meters operates maturely and can deliver at scale; some specification products have been batch-installed and put into routine operation in domestic large-scale Z-pinch insulation stacks. User feedback indicates that the self-developed XCPS material exhibits excellent performance in voltage withstand, dielectric stability, radiation resistance, and discharge endurance, with all core parameters fully meeting the usage standards for extreme working conditions.

Relying on the accumulated mass production technology, Kerewo has launched a special project to tackle the 5.5-meter ultra-large insulation ring. Currently, the project has broken through key process bottlenecks, core parameters are under control, and the R&D progress is in line with expectations. Compared to mature small and medium-sized products, the 5.5-meter specification is no longer a routine scale-up for mass production but a breakthrough in the physical boundaries of material molding, meeting the rigid demands of next-generation fusion experimental platforms and large-scale pulsed power equipment development. XCPS cross-linked polystyrene is Kerewo's self-developed specialized insulation material, serving multiple functions including insulation, voltage equalization, and structural support, adapting to the extreme high-voltage vacuum conditions of fusion devices.

Currently, the pace of global fusion R&D is accelerating. The Z-pinch route, with its advantages of simple structure, no need for superconducting magnets, and strong operational safety, has become the mainstream technical direction second only to magnetic confinement. The industry predicts that after 2030, it is expected to gradually achieve commercial power supply, leading to a concentrated wave of upgrades for global experimental devices and a continuous increase in demand for large-size, high-voltage-resistant insulation components.