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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
Meeting Spotlight
Nuclear and Emerging Technologies for Space (NETS 2025)
May 4–8, 2025
Huntsville, AL|Huntsville Marriott and the Space & Rocket Center
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!
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June 2025
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Latest News
U.S. nuclear capacity factors: Stability and energy dominance
Nuclear generation has inertia. Massive spinning turbines keep electricity flowing during grid disturbances. But nuclear generation also has a kind of inertia that isn’t governed by the laws of motion.
Starting—and then finishing—a power reactor construction project requires significant upfront effort and money, but once built a reactor can run for decades. Capacity factors of U.S. reactors have remained near 90 percent since the turn of the century, but it took more than a decade of improvements to reach that steady state. The payoff for nuclear investments is long-term and reliable.
Workshop
Sunday, April 21, 2024|8:00AM–12:00PM PDT|Franciscan A
Price: $49
Westinghouse Electric Company recognizes the importance of supporting students pursuing a career in reactor physics. For this reason, Westinghouse will be sponsoring the first 100 student workshop registrants by covering their fees. Contact registrar@ans.org for a discount code before registering. Limited space available in each workshop. Once these seats are filled, you will be put on a waitlist. You must request a discount code before registering. No refunds will be made if you do not contact us before registering.
Organized by Ville Valtavirta, VTT Technical Research Centre of Finland
Kraken is a computational reactor analysis framework developed at VTT for both safety analyses and general research and educational purposes. With the neutronics side building heavily on the in-house Monte Carlo code Serpent, the framework couples novel Finnish solvers for core physics but also couples to state-of-the-art third party solvers. The Python based multi-physics driver Cerberus and the Python package of pre- and post-processing methods KrakenTools aim to simplify core analysis tasks.
This workshop is designed to give introductory training to new and upcoming. To participate in the hands-on portion of this workshop, participants must bring their own laptops with Kraken installed. Kraken will be available through RSICC ( https://rsicc.ornl.gov/ ) and OECD/NEA ( https://www.oecd-nea.org/dbcps/ ) in the near future. An update will be sent once the license can be requested. Participants who are not able to bring their laptop or to obtain the Kraken software in time may still attend the workshop. The material (including inputs for the examples) will be available to license holders in the Kraken-wiki after the workshop.
Agenda:
• Welcome + short introduction to Kraken
• Pre- and post-processing capabilities for Serpent users
• Cerberus - the very simple Python API for Kraken solvers
• Running Serpent via Cerberus - powerful new capabilities
• Reactor analysis with Kraken
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