President Hassan Rowhani is on Tuesday, to prepare plans for the production of ships motorized Nuclear payment, and to take legal measures to address the violation of US nuclear agreement between Tehran and the six countries, after the extension of congressional sanctions against Iran 10 years ago, which raised many speculations about the future agreement, and the fate of US-Iranian relations in general. In the following lines, it offers the "seventh day" 7 About Payment nuclear fuel and engines .. 1 Nuclear propulsion engines are the engines generate a lot of energy the main source for producing nuclear reactions. 2 Nuclear fuel is a substance used in nuclear reactors. 3 engines that operate nuclear fuel can travel and work long distances more quickly. 4 2014 expressed the Iranian navy for its need for nuclear-powered engines, according to the director of the Arab Center for Iranian Studies in Tehran, Mohammad Saleh Sedkian 5 requires nuclear propulsion engines industry enriched fuel by not less than 60%. 6 enriched uranium ratio in the terms of the agreement provides for the 3.67% 7 Unlike Iran, NASA is considering relying on payment of a nuclear thermal rocket to reach Mars in 2033