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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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PR: American Nuclear Society welcomes Senate confirmation of Ted Garrish as the DOE’s nuclear energy secretary
Washington, D.C. — The American Nuclear Society (ANS) applauds the U.S. Senate's confirmation of Theodore “Ted” Garrish as Assistant Secretary for Nuclear Energy at the U.S. Department of Energy (DOE).
“On behalf of over 11,000 professionals in the fields of nuclear science and technology, the American Nuclear Society congratulates Mr. Garrish on being confirmed by the Senate to once again lead the DOE Office of Nuclear Energy,” said ANS President H.M. "Hash" Hashemian.
M. E. Rivarola, P. C. Florido, D. O. Brasnarof, K. H. Kyung, L. Juanicó, J. Bergallo, J. Gonzalez, H. Daverio
Nuclear Technology | Volume 154 | Number 3 | June 2006 | Pages 361-373
Technical Paper | Enrichment | doi.org/10.13182/NT06-A3740
Articles are hosted by Taylor and Francis Online.
The SIGMA technology, a patented new concept for uranium enrichment based on the well-known gaseous diffusion (GD) method, has been developed by the Comisión Nacional de Energia Atómica in Argentina to be an alternative to compete in the uranium enrichment market. The SIGMA engineering approach stands on the integration of several GD stages in one module, with all the stages sharing one single multiflux compressor, one vessel, and a gas turbine. This arrangement, together with the use of the double-diffuser cascade configuration to increase the separative gain, leads to a breakthrough in the capital cost structure of the GD technology and a significant reduction in the energetic and operation costs. With the SIGMA concept, a leveled separative work unit cost that could be almost half the price of the present enrichment market level can be achieved. The SIGMA technology has also been conceived to incorporate proliferation-resistant features, and it has a very small overall proliferation risk. In this work we present the main features of the SIGMA technology, and we formulate a calculation scheme for the overall design analysis. We present some of the results of this investigation, including the SIGMA scale economy, and its comparison with others enrichment technologies.