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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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Nano to begin drilling next week in Illinois
It’s been a good month for Nano Nuclear in the state of Illinois. On October 7, the Office of Governor J.B. Pritzker announced that the company would be awarded $6.8 million from the Reimagining Energy and Vehicles in Illinois Act to help fund the development of its new regional research and development facility in the Chicago suburb of Oak Brook.
W. A. Woolson, M. L. Gritzner
Nuclear Technology | Volume 49 | Number 3 | August 1980 | Pages 410-425
Technical Paper | Fuel Cycle | doi.org/10.13182/NT80-A17689
Articles are hosted by Taylor and Francis Online.
The response of neutron logging tools used for uranium exploration to variations in tool design, borehole parameters, and rock matrix properties has been studied using discrete ordinates and Monte Carlo radiation transport methods. The logging techniques that have been analyzed include the measurement of signal radiation due to delayed fission neutrons and prompt fission neutrons generated in uranium ore by pulsed 14-MeV and iso topic 252Cf neutron sources. The effect of variations in the following parameters has been studied: source-detector separation, tool casing, borehole diameter, mudcake thickness, mud filtrate invasion, tool eccentricity, borehole casing, rock matrix composition, matrix moisture content, formation water composition, neutron poisons, thin ore beds, ore bed dipping angle, and ore grade. “Noise” radiation from fast fission in thorium ore and delayed oxygen neutrons has also been computed and compared to the signal radiation as a function of uranium and thorium ore grades, borehole size, and rock moisture concentration. Evaluation models have been produced to aid in calibration of the logging tools for uranium assay.
