Kazakhstan open to storing Iran’s enriched uranium in nuclear deal Kazakhstan has indicated it could take custody of Iran’s enriched uranium stockpile if Washington and Tehran reach an agreement on the nuclear file, according to the head of the United Nations’ nuclear watchdog. Rafael Grossi told The Financial Times that the proposal was discussed during talks with Kazakh President Kassym-Jomart Tokayev in Astana earlier this week. He said Kazakhstan signalled its readiness to host the material as part of a broader deal aimed at limiting Iran’s nuclear programme.