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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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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.
Chien C. Lin, J. H. Chao
Nuclear Technology | Volume 160 | Number 2 | November 2007 | Pages 244-250
Technical Paper | Radioisotopes | doi.org/10.13182/NT07-A3896
Articles are hosted by Taylor and Francis Online.
The main function of radiochemical surveillance in a nuclear power plant is to monitor the transport of radioactive materials in and out of various systems, including the fuel integrity evaluation and the control of radioactive material release to the environment. Radiochemical analyses of iodine activities in the reactor coolant to assess fuel integrity during normal operation and to characterize the nature of fuel failure are demonstrated. Assessment of fission products released by the so-called recoil process is emphasized in the study. Measurements of 91Sr and 92Sr in reactor water are recommended as the recoil indicators and to determine the fuel particle contamination on fuel surfaces. In an operating BWR/6 with a recoil level at ~1.2 × 1013 fission/s operated at ~2980 MW(thermal), ~30 g of fuel particle contamination was estimated.
