To ask the Secretary of State for Energy and Climate Change what recent assessment he has made of the efficiency of high burn-up fuel used in nuclear power plants. (291346)

The Department has not assessed the efficiency of different burn-up¹ levels for nuclear fuels.

The fuel and its burn-up efficiency is a matter for the commercial operators to address, whilst ensuring that regulatory requirements are met.

¹ Burn-up is measured by the amount of energy extracted for a given mass of uranium-units GWd/tU.