Question to the Department for Business, Energy and Industrial Strategy:

To ask Her Majesty's Government what information they have received on the size, in terms of output, of proposals to design and build small modular nuclear reactors in the UK.

Since 2015, the Government has engaged with over 30 small and advanced reactor vendors through initiatives such as the SMR Competition (March 2016 – December 2017) and the ongoing Advanced Modular Reactor (AMR) Feasibility and Development Project.

The sizes of individual reactor modules range from 4MWe – 465 MWe. Many vendors are designing reactors with the intention of multiple modules being deployed together, scaling up the generation output of an installation. This includes proposals for modular reactor power stations with the potential outputs around 1GWe. The reactor technology types range from conventional water-cooled reactors, to 4th generation reactors using novel fuels and coolants, as well as fusion reactor concepts.