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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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Nuclear Science and Engineering
September 2025
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October 2025
Latest News
Shifting the paradigm of supply chain
Chad Wolf
When I began my nuclear career, I was coached up in the nuclear energy culture of the day to “run silent, run deep,” a mindset rooted in the U.S. Navy’s submarine philosophy. That was the norm—until Fukushima.
The nuclear renaissance that many had envisioned hit a wall. The focus shifted from expansion to survival. Many utility communications efforts pivoted from silence to broadcast, showcasing nuclear energy’s elegance and reliability. Nevertheless, despite being clean baseload 24/7 power that delivered a 90 percent capacity factor or higher, nuclear energy was painted as risky and expensive (alongside energy policies and incentives that favored renewables).
Economics became a driving force threatening to shutter nuclear power. The Delivering the Nuclear Promise initiative launched in 2015 challenged the industry to sustain high performance yet cut costs by up to 30 percent.
Edward Fisher
Nuclear Science and Engineering | Volume 1 | Number 3 | July 1956 | Pages 222-238
Technical Paper | doi.org/10.13182/NSE56-A17854
Articles are hosted by Taylor and Francis Online.
The streaming of neutrons in narrow channels through thick shields is treated theoretically, using one-velocity diffusion theory. Scattering by the channel walls is evaluated, and it is shown how the entrance and exit of a channel affects its streaming current. The cases examined are the straight duct, gap, and annulus, offsets for the gap and annulus, and bends for the duct and gap. In all cases simple, approximate formulas are obtained.
