National Nuclear Laboratory (NNL) – Written evidence (LES0033)


This paper presents evidence from the National Nuclear Laboratory (NNL) to the House of Lords Science and Technology Committee inquiry into Long-duration energy storage


Introduction to NNL

NNL is the UK’s national laboratory for nuclear fission. We are a Public Sector Research Establishment, Government owned (through the Department for Energy Security and Net Zero (DESNZ)) but operationally independent. We have built a distinct identity as the UK’s technical authority on nuclear fission – promoting UK skills and interests whilst tackling global challenges.


We are custodians of a unique set of facilities and capabilities that enable ground-breaking nuclear research and development – including four world-leading laboratories in the North-West of England. Our facilities, valued at £1.5bn, are of national strategic importance and are operated for the benefit of academia (who can arrange access to use our facilities for their own work) and industry. They form a vital part of the UK’s nuclear Research, Development and Innovation ecosystem.


Our purpose is to harness ‘Nuclear Science to Benefit Society’. We channel our work into four strategic areas: Clean Energy, Health & Nuclear Medicine, Environmental Restoration and Security & Non-Proliferation. These four Focus Areas shape what we deliver to our customers, for UK society and how we invest in our future[1].


As the UK’s national laboratory for nuclear fission, we work closely with Government and industry in understanding how new nuclear energy can achieve policy goals for energy security, net zero, and economic growth as part of a future integrated energy system.


Key messages




Response to inquiry questions


2. How sensitive is the amount of storage needed to assumptions about the future balance of supply and demand on the grid?





What role could nuclear power, fossil fuel generation with carbon capture and storage, or other energy technologies, play in reducing the need for energy storage on a net zero grid?













11 September 2023

[1] Nuclear Science to Benefit Society – Our Strategic Plan | National Nuclear Laboratory (

[2] Energy white paper: Powering our net zero future - GOV.UK (