TEHRAN, Iran - Former Iranian President Hashemi Rafsanjani said Tuesday that Iran has enriched uranium using 164 centrifuges, a major development in nuclear fuel cycle technology, news agencies reported. Rafsanjani made the comment to the Kuwait News Agency during an interview in Tehran. "Iran has put into operation the first unit of 164 centrifuges, has injected (uranium gas) and reached industrial production," the Kuwait News Agency quoted Rafsanjani as saying. Iranian authorities had promised to announce "good nuclear news" on Tuesday.