In this review article, published after the Fukushima accident, medical scientists examine published information on the short- and long-term health risks of exposure to ionising radiation. The article describes two previous nuclear accidents — at Three Mile Island in the USA, and Chernobyl in Ukraine — and explains the types and doses of radiation that can damage biological systems. It discusses the mechanisms behind exposure, and radiation-induced illness and injury, including long-term cancer risks. The authors also review measures that can be taken to reduce the effects of radiation exposure, including potassium iodide tablets used in the aftermath of Chernobyl. The article stresses that clear communication on radiation exposure levels and health risks is a key component of the response to a nuclear incident.

This review article, published before the accident at Fukushima, discusses the immediate and long-term prospects of nuclear power development to meet future carbon-free energy needs. It explores opportunities and constraints of generating a nuclear power 'renaissance', and puts forward six possible options for building a sustainable nuclear energy industry.

The authors say that nuclear technology is at a crossroads, and if it is to move forward a two-stage strategy is needed. The first stage must involve developing or extending the life of the world’s existing nuclear plants over the next two years, to improve their efficiency and reliability. In the second stage, after 2030, the industry should look to build new nuclear power stations with large-scale fuel cycles that may include fuel reprocessing. They highlight measures that, if taken now, could make nuclear a viable energy option in the future.