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The application and interpretation of the same safety objectives into specific national regulatory requirements and guidance result in significant differences between the same reactor design when deployed in different countries, writes Claude Mayoral. A more harmonised approach to regulation will be needed to enable the widespread deployment of small modular and advanced reactor designs.

For small modular reactors to play their part in the clean energy transition, it is crucial that vendors and regulators engage early to clarify the degree of design maturity required to start the licensing process, according to a new report published today by World Nuclear Association. National regulators should collaborate through bilateral and multinational agreements on design and safety reviews, share technical reviews, establish common positions on safety criteria, and make appropriate use of existing reference SMR design reviews to streamline SMR licensing processes, it says.