The global and UK drive for a low-carbon dioxide environment, as well as a secure and affordable energy supply, has encouraged nuclear power to play a core role in the UK energy mix: the UK landscape today houses eight large nuclear plants (15 reactors) reported to generate about 21% of UK electricity. By 2030, two-thirds of the UK's electricity generation capacity will have retired; it will need to be replaced with low-carbon dioxide and reliable power for the future to improve the UK's energy security and meet its commitments on carbon dioxide emissions targets. With 50% cumulative growth in nuclear capacity forecast between 2014 and 2035 (in comparison to coal at 10%, oil at 20% and gas at 44%) still leaving nuclear with only a 5% share of global capacity in 2035, there is considerable scope for nuclear in the long term.