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Analysis: Nuclear power investment is still key to UK reaching net zero

18 June 2020 • In News
Analysis: Nuclear power investment is still key to UK reaching net zero

Rapid progress is being made on the first unit at Hinkley Point C nuclear power station.

A new report suggests the UK should commit to a further 10GW of new nuclear beyond Hinkley Point C as the government targets a net zero emissions economy.

Published by innovation agency Energy Systems Catapult, the analysis says the costs of nuclear power need to fall significantly if the technology is to fulfil its long term potential.

The report also strengthens the case that a small modular light water reactor (SMR) programme should proceed, similarly focused on the potential for cost-reduction. SMR designs that can deliver cogeneration of heat and power are worth particular attention.

While wind, in particular offshore wind, now looks the key technology for decarbonising power in the coming decades, trying to meet net zero without any new nuclear would put the target at risk unnecessarily and potentially make the shift to a low carbon economy more expensive, the report found.

The analysis found carbon capture and storage (CCS) is also an important technology, partly because of its ability to be used in multiple applications – including hydrogen production, while bioenergy with CCS could counter the residual emissions from aviation and livestock.

The Nuclear for Net Zero report looks at the potential roles and contribution of nuclear energy in supporting a range of decarbonisation pathways modelled in the recent Innovating to Net Zero report, including:

  • An expanded role for new Hinkley Point C-type Generation III+ nuclear in power generation.
  • Advanced Gen IV high-temperature nuclear plants coupled with hydrogen production technology – able to switch between power generation and efficient hydrogen to supply industry, plus heavy road transport and marine freight.
  • SMR deployed with city-scale District Heating Networks – to supply cost-effective low carbon heat for urban homes and businesses.

Energy Systems Catapult nuclear practice manager, Mike Middleton said: “Nuclear doesn’t need to be expensive if we take the right approach.

“Achieving net zero without nuclear is possible but targeting such a system looks unnecessarily risky, to the point of being unlikely to achieve the end result; and potentially expensive.

“There are no easy paths to get the entire UK economy to net zero carbon emissions by 2050, but there is a credible path available to realise significant nuclear cost reduction delivering potentially lower costs and risks associated with achieving UK Net Zero.

“Firstly, a commitment to a programme of capacity rather than individual unconnected projects.

“Secondly, capitalising on the benefits from deploying units in an uninterrupted construction sequence, with multiple units on the same site where possible.

“Provided that costs reduce in line with the analysis we have reported, the deployment decision regarding new large nuclear is not whether to start, but when to stop.”

The potential policy approach for nuclear suggested by this new analysis includes:

  • Committing now to around 10GW of additional new Gen III+ reactor capacity beyond Hinkley Point C’s 3.2 GWe.
  • Over the next five years in parallel, support stage-gated development programmes for UK deployment of SMR and advanced Gen IV reactors. Coupled with assessing the progress of alternative low carbon energy technology development, this would provide a clearer indication of the likelihood of realising the benefits from these two technologies to support periodic policy reviews between 2025 to 2035 which would govern the shape of a 2050 UK Net Zero energy system.
  • If nuclear can fulfil its cost reduction potential and contribute to the challenges of decarbonising heat and hydrogen, around 50 GWe of nuclear may be needed by 2050. However, there is significant uncertainty about the mix within a 50 GWe nuclear portfolio, underlining the importance of stage-gated approaches for both light-water SMRs and advanced Gen IV reactors.

Catapult Energy Systems
www.es.catapult.org.uk

Michael Tyrrell

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Michael Tyrrell
Digital Coordinator

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