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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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Latest News
Three nations, three ways to recycle plastic waste with nuclear technology
Plastic waste pollutes oceans, streams, and bloodstreams. Nations in Asia and the Pacific are working with the International Atomic Energy Agency through the Nuclear Technology for Controlling Plastic Pollution (NUTEC Plastics) initiative to tackle the problem. Launched in 2020, NUTEC Plastics is focused on using nuclear technology to both track the flow of microplastics and improve upstream plastic recycling before discarded plastic can enter the ecosystem. Irradiation could target hard-to-recycle plastics and the development of bio-based plastics, offering sustainable alternatives to conventional plastic products and building a “circular economy” for plastics, according to the IAEA.
J. B. Dragt, J. W. M. Dekker, H. Gruppelaar, A. J. Janssen
Nuclear Science and Engineering | Volume 62 | Number 1 | January 1977 | Pages 117-129
Technical Paper | doi.org/10.13182/NSE77-3
Articles are hosted by Taylor and Francis Online.
In the analysis of fission product reactivity worths, measured in the fast reactor spectra of the STEK critical-experiments facility, extensive use is made of a statistical method of cross-section adjustment. The principle is that adjustments are applied to the evaluated cross sections, as much as possible within their error limits and taking into account the existing correlations, in such a way that a better agreement between calculated and measured integral data is obtained. The method is briefly summarized in general terms, with some special applications needed for the STEK project. Then, a description is given of the practical realization for capture cross-section adjustment on the basis of reactivity worths of samples of fission product mixtures in different thicknesses measured in several fast reactor spectra. Details are given on the way the various contributions to the covariance matrix of group cross sections, including resonance selfshielding, are calculated for the fission product nuclides and for the mixtures. The paper only outlines the methods used; examples of applications can be found elsewhere. Finally, some limitations of the method and possible extensions in connection with standard nuclear data error files are discussed.