While a nuclear plant emits negligible CO2 in operation, the mining, milling, fabrication and especially enrichment of uranium fuel rods are very carbon-intensive. In fact, there are whole utility-size coal power plants that are devoted to powering existing US uranium enrichment facilities. Also, the huge amount of materials, principally energy-intensive concrete, required to construct the necessary containment structures for nuclear plants is also very carbon-intensive. Conservative analyses have found that nuclear power is 7 TIMES more carbon-intensive than its closest renewable competitor – wind power generation. Read more http://saplnh.org/about-nuclear/why-nuclear-power-is-not-sustainable/