ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
2026 Nuclear Energy Conference & Expo (NECX)
August 24–27, 2026
Dallas, TX|Hilton Anatole
Latest Magazine Issues
Jun 2026
Jan 2026
2026
Latest Journal Issues
Nuclear Science and Engineering
July 2026
Nuclear Technology
June 2026
Fusion Science and Technology
May 2026
Latest News
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.
Niyanth Sridharan, Kevin Field
Fusion Science and Technology | Volume 75 | Number 4 | May 2019 | Pages 264-274
Technical Paper | doi.org/10.1080/15361055.2019.1577124
Articles are hosted by Taylor and Francis Online.
Advanced manufacturing (AM) is a disruptive manufacturing process often referred to as “the next industrial revolution” because of its ability to fabricate components with complex geometries and site-specific materials and properties. While other industries, like automotive, aerospace, and fossil-fired power companies, are adopting and evaluating AM processes, the nuclear industry, including the fusion materials community, has been somewhat slow to capitalize on the seemingly beneficial aspects of AM. To address this gap, Oak Ridge National Laboratory is evaluating candidate AM techniques to fabricate nuclear-relevant materials including ferritic-martensitic (FM) steels. This paper discusses the development of a road map for AM approaches for FM steels. Specifically, the connection among alloy composition, additive processes, processing conditions, and postprocessing and the resulting microstructure using both wire-based and powder-based directed energy deposition techniques is detailed. Finally, strategies to develop specialized alloys for additive manufacturing are outlined.