Hydrogen fuel cells could be one of the technologies providing decarbonised energy on the railway. They could also provide traction for self-powered trains where electrification of the network is not feasible. Network Rail’s Traction Decarbonisation Network Strategy (TDNS) has identified 6% of the GN network as being most suitable for hydrogen traction. But we need debate and discussion throughout industry about this so that everyone in rail is properly engaged and the opportunities are realised safely and efficiently.

Why research into hydrogen as a fuel in rail is needed

The novelty of hydrogen as a fuel means that knowledge and expertise about it is currently limited. Hydrogen is known to be an explosive gas with significant safety risks, but the precise nature of the risks associated with hydrogen fuel cells operating as part of the rail network are not fully understood or quantified. Industry also needs to know who would be responsible if there were any hydrogen-related accidents. Everyone will probably have a view on what is needed from their current perspective which could usefully inform the debate.

For hydrogen fuel to be used in rail, the industry needs specific information in both the short and long term. In the short-term, rail needs a consistent understanding of system boundaries, responsibilities, relevant standards and safety targets about hydrogen fuel. Longer-term, the industry needs standards, risk models and industry guidance for the safe operation of hydrogen rolling stock.

The Hydrogen Policy and Standards Review 

The Hydrogen Policy and Standards Review is the first report from standards project 22-007 Review of the Risks Associated with Hydrogen Fuelled Rolling Stock. It covers the adequacy of existing standards to manage the risks associated with hydrogen systems and clarifies the boundaries between all affected parties with regards to the discharging of responsibilities. Industry is warmly encouraged to use this document as part of its debate about these important issues.