This study was motivated by a conflict between the nonproliferation objectives of the Energy Policy Act of 1992, which created increasing pressures to phase out . exports of highly enriched uranium (HEU) for medical isotope production, and the Energy Policy Act of 2005, which sought to increase the reliability of medical isotope supply by lifting the requirements of the 1992 Act for HEU exports to Canada, the Netherlands, Belgium, France, and Germany for medical isotope production. At no time during the study were these dual objectives of securing HEU and providing a reliable supply of medical isotopes questioned by the committee—both objectives are obviously important. The question we pursued was the.