What's the point of nuclear talks if Iran won't talk about their program?

Iran's chief nuclear minister has said that his country won't be talking about their own nuclear at the upcoming talks with members of the UN security council. He went on to say that the newly revealed uranium enrichment site was built near a military site so that in case his country was attacked, they would be able to continue their nuclear activities. Many people are saying stricter U.S. sanctions are inevitable.