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Antares achieves zero-power criticality at INL
Leveraging more than $140 million in private capital fundraising, over 322,000 square feet of operational manufacturing space, and multifaceted partnerships with the Departments of Energy and Defense, reactor start-up Antares has become the first company involved in the Reactor Pilot Program to achieve zero-power fueled criticality—a full month ahead of the July 4 deadline set by President Trump’s Executive Order 14301.
This milestone, announced yesterday, was achieved with the company’s Mark-0: a sodium heat-pipe-cooled, TRISO-fueled microreactor. The Mark-0 is a forerunner to the company’s flagship design, which it calls the R1. For Antares, this development represents a key validation of its reactor physics, control systems, and supply chain.
Amitkumar Shelar, Babruvahan Ronge
Fusion Science and Technology | Volume 81 | Number 5 | July 2025 | Pages 396-412
Research Article | doi.org/10.1080/15361055.2024.2441611
Articles are hosted by Taylor and Francis Online.
Hot work die steel possesses better elevated temperature properties that are desired for hot working application. In the present work, the life of forging die steel (DIN 1.2714) was extended by surface overlay coating using metal inert gas welding, which decreases die wear. This study compares two distinct iron-based overlay coating compositions applied to forging dies and samples, followed by tempering and exposure to varying cooling rates. The microstructure of the coated samples was analyzed through optical and scanning electron microscopy. These different coatings, along with the varied cooling rates, were assessed to identify conditions that reduce defects and improve the longevity of the forging die. The forging die’s lifespan was observed to increase by 44%, which can be attributed to the selection of suitable alloying elements for the overlay coating and the optimization of the cooling rate.