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.
Division Spotlight
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
May 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
July 2025
Nuclear Technology
June 2025
Fusion Science and Technology
Latest News
Nuclear moratoriums crumble around the world
The recent surge in positive sentiment about nuclear as the most viable answer to global energy needs and decarbonization goals has found governments around the world taking steps to reverse course on decades-old bans, moratoriums, and restrictions on new nuclear development.
Utility Working Conference and Vendor Technology Expo (UWC 2023)
Sean Sexstone is GE Hitachi Nuclear Energy’s Executive Vice President, Advanced Nuclear. In his role, Sean focuses on leading the development and project delivery of the Advanced Nuclear business. He’s responsible for furthering the design progress of BWRX-300 and Natrium projects, supporting our customers, meeting product cost targets to ensure competitiveness in the market, and developing key partnerships for global SMR deployment.
Sean joined GEH February 2022 from Aecon, where he was responsible for leading Aecon’s Nuclear group with a focus on life extension projects, plant life maintenance projects, decommissioning and nuclear fabrication. While at Aecon, he led large capital projects including the refurbishment at Bruce Power and at OPG’s Darlington Nuclear Generating Station. Prior to Aecon Sean gained EPC execution experience with CB&I/McDermott as well as utility experience with Entergy, focusing on project management, supply chain and vendor oversight.
Sean has a Bachelor of Science degree in Industrial Engineering from West Virginia University, and a Master of Business Administration from Duke University.
Last modified July 27, 2023, 3:40pm EDT
