促进英国乏燃料运输的安全和安保

The IAEA assists countries in the development and implementation of transport strategies in compliance with the relevant IAEA safety standards. The Specific Safety Requirements under Regulations for the Safe Transport of Radioactive Material (IAEA Safety Standards Series No. SSR-6 (Rev.1)) have been adopted by the International Civil Aviation Authority for transport by air, by the International Maritime Organization for shipment by sea and by national regulatory authorities for land transport — both road and rail.

The requirements of SSR-6 (Rev.1), published in 2018, include activity and classification of radioactive material, definition and permitted contents of package types, package design performance and testing criteria for each type. For each package type, it defines the requirements for design approval by national regulatory authorities before use and periodically thereafter; documentation, labelling and package marking; external surface temperature, radiation and contamination limits; consignment limits; and training.

In the case of packaging, requirements are based on the hazard level of the material to be contained. For high-hazard radioactive material, such as spent fuel, packaging needs to comply with prescribed design and performance requirements in order to withstand severe transport accidents that involve impact and fire without significant release of its contents. This is determined through rigorous testing of the material in various situations. British Nuclear Fuels Limited, for example, has conducted a series of public demonstrations simulating accidents of a train hitting a spent fuel cask at speeds of nearly 160 km/h. Little damage was done to the cask, demonstrating its safety (see Transporting spent nuclear fuel).

“Another important aspect of transport is how we reassure the communities these materials travel through that they are safe and secure. When people see casks, they often have concerns,” said Mulkern. International Nuclear Services, a company involved in the management and transportation of nuclear fuel, for example, holds regular community and stakeholder meetings in Barrow-inFurness, a port town in the north of England with direct rail links to the Sellafield site, to discuss what they are transporting through the county and worldwide, and how it is safe and secure.

The transport of hazardous materials also entails the prevention of potential acts of theft or sabotage, which requires appropriate physical protection not only through container design, but also through relevant security procedures. The IAEA assists countries, upon request, with the development and maintenance of physical protection regimes, including through support in drafting transport security regulations and transport security exercises. The purpose of such exercises is to identify any potential weaknesses in the transport security regime and make any necessary improvements.

“Moving forward, it is important to continue to encourage younger people to be directly involved in the nuclear industry, particularly in the transport sector,” said Mulkern. “New power plants are being built all over the world, so we need to make sure that the existing experience and expertise is handed over in an appropriate way. People need to have not only the information, but also the experience of undertaking shipments, whether they involve spent fuel or decommissioning waste, as well as the confidence to transport them in the right way. We need to continue to transport in a compliant way and properly communicate what we are doing and why it is safe.”