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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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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Latest News
The journey of the U.S. fuel cycle
Craig Piercycpiercy@ans.org
While most big journeys begin with a clear objective, they rarely start with an exact knowledge of the route. When commissioning the Lewis and Clark expedition in 1803, President Thomas Jefferson didn’t provide specific “turn right at the big mountain” directions to the Corps of Discovery. He gave goal-oriented instructions: explore the Missouri River, find its source, search for a transcontinental water route to the Pacific, and build scientific and cultural knowledge along the way.
Jefferson left it up to Lewis and Clark to turn his broad, geopolitically motivated guidance into gritty reality.
Similarly, U.S. nuclear policy has begun a journey toward closing the U.S. nuclear fuel cycle. There is a clear signal of support for recycling from the Trump administration, along with growing bipartisan excitement in Congress. Yet the precise path remains unclear.
A. D. Carlson, R. J. Cerbone
Nuclear Science and Engineering | Volume 42 | Number 1 | October 1970 | Pages 28-40
Technical Paper | doi.org/10.13182/NSE70-A19324
Articles are hosted by Taylor and Francis Online.
The total neutron cross sections of nitrogen and iron have been measured with high resolution (0.035 nsec/m) in the neutron energy range from 0.5 to 9.0 MeV. The nitrogen measurements have provided evidence that a recently reported discrepancy in the total nonelastic cross section is not a result of errors in the total neutron cross section. The iron cross section obtained was found to be in best agreement with the recent Karlsruhe data with respect to the positions and presence of structure; however, the present measurements have revealed cross sections in the valleys which are lower. Comparisons are made of the present measurements on nitrogen and iron with previous measurements.
