{"id":3227,"date":"2025-06-23T18:31:40","date_gmt":"2025-06-23T09:31:40","guid":{"rendered":"http:\/\/kyotofusioneering.com\/kfwp\/?post_type=news&p=3227"},"modified":"2026-04-13T23:04:17","modified_gmt":"2026-04-13T14:04:17","slug":"the-fusion-era-fusion-fuel-storage-new-experimental-device-delivered","status":"publish","type":"news","link":"https:\/\/kyotofusioneering.com\/en\/news\/2025\/06\/23\/3227","title":{"rendered":"THE FUSION ERA \u2013 Fusion Fuel Storage: New Experimental Device Delivered!"},"content":{"rendered":"\n
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We\u2019re excited to share that a new experimental device that we developed has arrived at our R&D facility in Tokyo!<\/p>\n\n\n\n

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This device is designed to a valuable piece for experiments: testing the core functions of the fusion fuel cycle system\u2014a critical technology that ensures a steady supply of tritium and deuterium, the fuels that power fusion reactions. It will eventually be integrated into our next-generation UNITY-2 facility in Canada.<\/p>\n\n\n\n

In this blog, we sit down with Dr. Suneui Lee, who leads the R&D on this project, to explore the system\u2019s unique features and how it\u2019s paving the way for the future of fusion fuel storage, which is the heart of the fuel management system<\/p>\n\n\n\n

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Diagram of the Fusion Fuel Cycle System for UNITY-2<\/em><\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

Can you tell us more about this device?<\/strong><\/h3>\n\n\n\n

This new experimental system is designed to test technologies for the safe and efficient storage and retrieval of tritium and deuterium, which are the hydrogen isotopes used as fuel in fusion reactors. (See the diagram above labeled \u201cFuel Management System.\u201d)<\/p>\n\n\n\n

At room temperature, tritium and deuterium exist as gases, making them difficult to store in large quantities. Storing them in their gaseous form would require massive spherical tanks\u2014like those used for city gas\u2014and could pose a safety risk in case of an unintended tritium gas leak.<\/p>\n\n\n\n

To solve the storage challenge, we\u2019ve developed a system that uses a hydrogen-absorbing alloy called ZrCo (zirconium-cobalt). This material can safely absorb and release hydrogen isotopes under controlled temperature and pressure conditions. At room temperature and atmospheric pressure, ZrCo remains stable\u2014with virtually no absorption or release\u2014making it ideal for long-term storage. ZrCo can absorb high hydrogen amounts, by factors more than according to the weight of the storage material, enabling much more compact storage than by using conventional low pressure gas tanks. <\/p>\n\n\n\n

This new device is designed to help us determine the optimal storage conditions for using ZrCo in future fusion power plants. It will also test how the material performs over repeated use. <\/p>\n\n\n\n

Note: These tests will be conducted using hydrogen and deuterium\u2014not radioactive tritium\u2014to ensure a safe testing environment. The found solution will finally be validated in our UNITY-2 test facility.<\/p>\n\n\n\n

How is this different from the previous device featured in one of our earlier Fusion 101 blogs?<\/h3>\n\n\n\n

(Read the previous Fusion 101 blog here<\/a>)<\/em><\/p>\n\n\n\n

The new system has been specifically designed to meet the requirements for integration into UNITY-2. Unlike earlier setups, this version is part of a coordinated system that includes impurity removal from hydrogen isotopes and simulated fuel injection into the plasma containment vessel\u2014the core of the fusion reactor.
To boost performance and efficiency, we\u2019ve made several key upgrades:<\/p>\n\n\n\n