Alongside renewables, nuclear power is often promoted as a viable energy option for major expansion in the future. However, it faces significant problems. Taking a critical approach towards the ongoing viability of nuclear energy solutions, this research and reference text contextualises the vices and virtues of fusion and fission against the rapidly expanding area of renewables and the challenge of climate change, in order to assess the future viability of nuclear power. This thoroughly updated second edition contains extensive new content on the prospects of nuclear power and progress made in the 2020s. It is an invaluable resource for researchers and postgraduate students in areas of nuclear power and nuclear energy, as well as for general readers interested in the nuclear debate.