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Conference Spotlight
2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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
Dec 2025
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
January 2026
Nuclear Technology
December 2025
Fusion Science and Technology
November 2025
Latest News
Thea Energy releases preconceptual plans for Helios fusion power plant
Fusion technology company Thea Energy announced this week that it has completed the preconceptual design of its fusion power plant, called Helios. According to the company, Helios is “the first stellarator fusion power plant architecture that is realistic to build and operate with hardware that is available today, and that is tolerant to the rigors of manufacturing, construction, long-term operation, and maintenance of a commercial device.”
Nuclear Criticality Safety Division 2025 Conference
United Kingdom National Nuclear Laboratory (UKNNL)
Criticality Technical Leader
Senior Fellow in Criticality Safety
Dr. Deborah Hill completed her PhD in Physics at the University of Warwick before joining British Nuclear Fuels Limited (BNFL) in 1997 as a trainee criticality safety assessor at the Springfields site in Preston. Over the past 25+ years, she has established herself as a leading expert in nuclear criticality safety, providing specialist support to a range of national and international clients. She now serves as the Criticality Technical Leader and as a Senior Fellow in Criticality Safety at the United Kingdom National Nuclear Laboratory (UKNNL).
Deborah has held prominent leadership roles across the criticality safety community, including Chair of both the UK Working Party on Criticality and the American Nuclear Society (ANS) Nuclear Criticality Safety Division (NCSD). She was honored with the NCSD Distinguished Service Award in 2019 and named an ANS Fellow in 2024. A key contributor to criticality safety standards, Deborah also currently chairs the working group responsible for the recent revision of the ANS-8.20 criticality training standard and serves as a member and secretary of the ANS-8 Standards Committee.
At UKNNL, Deborah also now leads the UKNNL Fellowship, a group of senior science, engineering, and technology leaders who play a key role in shaping the organization’s strategic Science & Technology (S&T) Agenda. Her broader industry leadership also includes past service as Chair of the ANS Professional Divisions Committee.
Last modified July 30, 2025, 8:26am CDT
