Rail freight’s role in the UK’s nuclear industry extends well beyond the transportation of nuclear fuel and radioactive waste. It also provides the capacity to move the enormous quantities of construction materials required for decommissioning, site maintenance and environmental protection. A recent campaign by Nuclear Transport Solutions (NTS), using its Direct Rail Services (DRS) division, demonstrated how rail can support some of the industry’s less conspicuous, but equally important, activities.
More than 330,000 tonnes of aggregate have been delivered by rail to the Low Level Waste (LLW) Repository in Cumbria, northwest England. The material was required for a major environmental protection project involving the replacement of a protective membrane over historic waste disposal trenches. The deliveries involved 365 trains and removed more than 17,000 truck journeys from local roads, according to the decommissioning authority.a
Supporting the nuclear industry’s wider needs
The deliveries formed part of the Southern Trench Interim Membrane (STIM) project, undertaken by Nuclear Waste Services (NWS) at its LLW Repository. The work involves replacing the protective membrane covering the site’s southern legacy disposal trenches. The membrane prevents rainwater from reaching the waste beneath it, protecting the surrounding environment and supporting the long-term management of the repository.
The aggregate was delivered directly to the repository’s rail sidings before being transferred to the trench cap as part of the construction programme. The material is needed to support the new protective covering, which must be completed before the final capping of the northern trenches can begin. It is a substantial civil engineering undertaking, requiring large volumes of material to be moved to a relatively remote location.
A choice, not a regulatory requirement
The project also provides an opportunity to challenge a common misconception about the transportation of nuclear waste. There is no general requirement under UK law or the mandate of the Nuclear Decommissioning Authority for radioactive materials or nuclear waste to be carried by rail. The regulatory framework permits appropriately compliant movements by road, rail and, in certain circumstances, other modes of transport.
The Office for Nuclear Regulation (ONR) oversees the civil transport of radioactive materials by both road and rail in Great Britain. The applicable regulations impose stringent requirements covering packaging, classification, labelling, security and the safe conduct of transport. The decision to use rail for the aggregate campaign, and for other nuclear-sector movements, is therefore an operational choice rather than a statutory obligation.
Rail’s contribution to nuclear safety
Organisations responsible for managing the UK’s nuclear legacy have considerable responsibilities for protecting people and the environment. Their use of rail reflects confidence in its ability to move substantial volumes of material within a controlled and regulated transport system. It also demonstrates that the railway’s contribution to the nuclear sector is not confined to the specialist movement of radioactive consignments.
For Nuclear Transport Solutions, the aggregate campaign illustrates the wider capabilities of its rail operation. The same industry expertise and infrastructure that support nuclear-related transport can also be applied to conventional freight, including construction materials. In this instance, rail provided a practical alternative to thousands of individual road journeys, while helping an important environmental project progress.
Demonstrating the value of rail freight
“This project is a fantastic example of how rail freight can support major national infrastructure and environmental programmes while delivering tangible benefits for local communities,:” said Tony Hewitson, Interim Managing Director of NTS Rail. “Completing these deliveries ahead of schedule reflects the professionalism and commitment of our colleagues, customers and supply chain partners. It also demonstrates why rail is the obvious choice for moving large volumes of material safely, efficiently and sustainably.”
The STIM campaign emphasises that the benefits of rail freight are often found away from the more visible headline movements. Moving aggregates, engineering materials and other bulk commodities can make a significant contribution to major infrastructure and environmental programmes. For the nuclear industry, rail is not simply a means of transporting the waste itself. It is also an important part of the wider logistical effort to manage that legacy safely.