U.S. officials are increasingly confident that Russia will hold to its plan to limit the use of highly enriched uranium in manufacturing medical isotopes, sources familiar with the matter said. "We have no reason to doubt the Russians' commitment to work toward the conversion of their [medical isotope] production process from HEU targets to LEU targets as they have stated at recent international conferences," said Parrish Staples, director of European and African threat reduction for the National Nuclear Security Administration. This confidence in Russia may delay Congress from implementing a ban on HEU imports. However, Nuclear Proliferation Prevention Project coordinator Alan Kuperman said the HEU ban is still needed.

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