Iran is due to enter talks with world powers on an enriched uranium deal to help calm western fears that Tehran is seeking to develop a nuclear bomb.The country avoided tougher UN sanctions by taking part in high-level talks in Geneva earlier this month. Officials from Iran, the International Atomic Agency, France, Russia and the US will meet in Vienna to discuss how to provide 20 percent enriched uranium to power a research reactor in Tehran. Iran has warned that whatever happens at the talks, Tehran reserves the right to continue to enrich its own uranium. In a goodwill move Iran has granted nuclear inspectors access to a previously unknown uranium enrichment site near Qom. Nuclear scientists will watch over the technical talks in Vienna, which provide Iran with a chance to build on prospects for nuclear cooperation.