Category Archives: Nuclear Reactors 1

License-by-test approach

Chapter 4 of reference [9.14] explains “license-by-test” approach as follows: A reactor prototype could be built and subjected to a pre-agreed set of anticipated transient without scram (ATWS) and other accident initiators. By demonstrating safety based on passive response, on the prototype, the licensing authority might be able to certify the design, permitting the manufacture of many tens (or hundreds) […]

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Introduction and Context

The present NEA study is a synthesis report on the development status and deployment potential of SMRs. It brings together the information provided in a variety of recent publications in this field, and presents the characterisation of SMRs already available for deployment and those that are expected to become available in the next 10-15 years. It also highlights the safety […]

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Conclusion

A principal conclusion of this study is that SMRs have a significant potential to expand the peaceful applications of nuclear power by catering to the energy needs of those market segments that cannot be served by conventional NPPs with large reactors. Such segments could be:

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Energy products

NPP operation in a co-generation mode (for example, with co-production of heat or desalinated water) is not a prerogative of SMRs. On a technical level it could, in principle, be realised in NPPs with large reactors as well. Plans exist to use the reject heat of large reactors operated (or being built) in Finland and the Russian Federation for local […]

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The analysis of factors influencing the competitiveness of SMRs

SMR vendors’ projections on the levelised unit cost of electricity1 (LUEC) suggest that in many cases the designers may intend to compete with large nuclear power plants (see Figure E.2). Other SMR concepts target niche applications in remote or isolated areas where the corresponding costs of generating electricity are significantly higher than in more populated areas.

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Risk-informed approach

As it was mentioned in Section 9.3, the current deterministic approach can be used to justify the reduced off-site emergency planning requirements for advanced reactors, including SMRs, in countries where the provisions for such a justification exist. However, the deterministic justification is likely to be conservative as the assumptions typically used in it are conservative.

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Outline of the report

In line with its synthetic nature, the present report starts with introducing the definitions (Chapter 2), providing a brief characterisation of SMRs available for deployment (Chapter 3), and introducing in more detail the design concepts of advanced SMRs belonging to the different technology lines (Chapter 4):

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