| 1. | EXECUTIVE SUMMARY | 
| 1.1. | Small modular reactors (SMRs): what and why? | 
| 1.2. | Why is interest growing nuclear energy? | 
| 1.3. | SMRs are expected to reduce the cost of nuclear energy | 
| 1.4. | SMRs could work alongside renewable energy systems towards decarbonization | 
| 1.5. | The cost of energy from SMRs could compete with renewables and fossil fuels | 
| 1.6. | Where are the SMR projects? | 
| 1.7. | Countries around the world are announcing interest in SMR projects | 
| 1.8. | SMRs enable new use-cases for nuclear energy | 
| 1.9. | What reactor technologies will SMRs use? | 
| 1.10. | SMRs in existence today | 
| 1.11. | Selected players in SMR design | 
| 1.12. | What is holding back SMRs? | 
| 1.13. | What factors are important when comparing SMR technologies? | 
| 1.14. | Insights from SMR benchmarking | 
| 1.15. | Forecasting the SMR market | 
| 1.16. | Forecasting growth in number of SMRs | 
| 1.17. | Growth in installed SMR electrical capacity: regions | 
| 1.18. | SMR technology breakdown by region: 2043 predictions | 
| 1.19. | Key takeaways on SMRs from IDTechEx | 
| 2. | INTRODUCTION | 
| 2.1. | Introduction: the nuclear industry, SMRs and technical background | 
| 2.2. | Nuclear industry overview | 
| 2.2.1. | Nuclear energy: the story so far | 
| 2.2.2. | Nuclear energy has struggled in recent years | 
| 2.2.3. | Nuclear power in the global energy mix | 
| 2.2.4. | The last decade was tough for nuclear. Why should this one be different? | 
| 2.2.5. | Nuclear new builds: why or why not? | 
| 2.2.6. | Nuclear for net zero: how much is needed? | 
| 2.2.7. | Why do hopes for nuclear installation rate vary so wildly? | 
| 2.2.8. | How realistic is rapid nuclear expansion? | 
| 2.2.9. | Segmenting nuclear technologies: generations | 
| 2.2.10. | How have commercial nuclear power plants been constructed? | 
| 2.2.11. | The economics of nuclear plant construction confound expectations | 
| 2.2.12. | Conclusions: the nuclear industry needs an overhaul | 
| 2.3. | Introduction to small modular reactors | 
| 2.3.1. | Small modular reactors (SMRs): what and why? | 
| 2.3.2. | Defining small modular reactors | 
| 2.3.3. | SMR drivers: transferring the economy of scale | 
| 2.3.4. | SMR construction economics: the evidence | 
| 2.3.5. | Motivation for adopting SMRs | 
| 2.3.6. | Modularization as a cost saving | 
| 2.3.7. | Cost of capital for SMRs vs. traditional NPP projects | 
| 2.3.8. | The cost of energy from SMRs could compete with renewables and fossil fuels | 
| 2.3.9. | SMRs as an answer to energy security | 
| 2.3.10. | Where are the SMR projects? | 
| 2.3.11. | Production bottlenecks for SMRs: reactor pressure vessels | 
| 2.3.12. | SMR developers face slow licensing processes, but progress is being made | 
| 2.3.13. | Are SMRs safer than large nuclear power plants? | 
| 2.3.14. | Conclusions: SMRs aim to make nuclear power economically viable | 
| 3. | FORECASTS | 
| 3.1. | Introduction to forecasting | 
| 3.2. | Forecasting overall electricity demand | 
| 3.3. | Nuclear energy by region today | 
| 3.4. | Nuclear energy by region: forecasting growth | 
| 3.5. | Where in the world is growth in nuclear energy expected? | 
| 3.6. | Constructing the forecast: SMRs in operation today | 
| 3.7. | Constructing the forecast: establishing when SMRs enter operation | 
| 3.8. | Forecasting methodology: projecting growth, technology focus | 
| 3.9. | Forecasting growth in number of SMRs | 
| 3.10. | Forecast: number of SMRs with table | 
| 3.11. | Reactor technology forecasts | 
| 3.12. | Forecasting reactor types: overall breakdown | 
| 3.13. | Forecast: SMR reactor types with table | 
| 3.14. | SMR technology breakdown by region: 2043 predictions | 
| 3.15. | Growth in installed SMR electrical capacity: regions | 
| 3.16. | Forecast: SMR electricity generated by region with tables | 
| 3.17. | Installed energy capacity of SMRs: electrical | 
| 3.18. | Installed energy capacity of SMRs: thermal | 
| 3.19. | How much will SMRs cost to build? | 
| 3.20. | Forecasting revenue from SMR construction: reactor types | 
| 3.21. | Forecast: SMR construction revenue by type with data table | 
| 3.22. | Forecasting revenue from SMR construction: regions | 
| 3.23. | Forecast: regional revenue from SMR construction with data table | 
| 3.24. | Forecasting: Conclusions | 
| 4. | SMR TECHNOLOGY ASSESSMENT | 
| 4.1. | Structure of this chapter | 
| 4.2. | Technical primer | 
| 4.2.1. | Nuclear fission: subatomic components | 
| 4.2.2. | Fission processes: releasing energy | 
| 4.2.3. | Segmenting SMRs: active vs. passive vs. inherent safety | 
| 4.2.4. | Controlling and maintaining chain reactions | 
| 4.2.5. | Fuel types in nuclear reactors: enrichment | 
| 4.2.6. | Fuel costs as a fraction of levelized cost | 
| 4.2.7. | Void coefficient as an indicator of safety | 
| 4.2.8. | Temperature coefficient also affects safety | 
| 4.2.9. | Explaining how nuclear reactors work through the context of light water reactors | 
| 4.2.10. | Ultimate heat sinks and reactor siting | 
| 4.3. | Segmenting SMRs by type | 
| 4.3.1. | Reactor technology coverage in this report | 
| 4.3.2. | Reactor designs: dividing by technology parameters | 
| 4.3.3. | New reactor designs: evolution vs. revolution | 
| 4.3.4. | Coolant temperature defines efficiency, application fit | 
| 4.3.5. | Distribution of project types by reactor class | 
| 4.3.6. | Project stage by reactor class (I) | 
| 4.3.7. | Project stage by reactor class (II) - frontrunner technologies | 
| 4.3.8. | Project stage by reactor class (III) - "middle of the pack" | 
| 4.3.9. | Project stage by reactor class (IV) - speculative technologies | 
| 4.3.10. | Which technologies are likely to see wide use in a future SMR fleet? | 
| 4.3.11. | Comparing promising technologies | 
| 4.3.12. | Conclusions: A wide range of reactor types are competing for use in SMRs | 
| 4.4. | SMR technology benchmarking | 
| 4.4.1. | Introduction to Benchmarking | 
| 4.4.2. | Benchmarking KPIs | 
| 4.4.3. | Building the benchmark | 
| 4.4.4. | Comparing benchmarks | 
| 4.4.5. | Which variables form each benchmark? | 
| 4.4.6. | Judging overall reactor performance | 
| 4.4.7. | The issue of unavailable data | 
| 4.4.8. | Comparing performance between benchmarking metrics | 
| 4.4.9. | Unweighted benchmarking scores | 
| 4.4.10. | What plant types are exceeding benchmarking expectations? | 
| 4.4.11. | Plant efficiency has little correlation with technological focus | 
| 4.4.12. | More power-dense plants are seeing greater industry focus | 
| 4.4.13. | Conclusions from benchmarking | 
| 4.5. | Pre-Gen IV reactor designs | 
| 4.5.1. | Pre-Gen IV designs: introduction to established nuclear technologies | 
| 4.5.2. | Pressurized Water Reactors (PWRs): Overview | 
| 4.5.3. | Layout of PWRs | 
| 4.5.4. | Types of PWR: overview | 
| 4.5.5. | Shrinking PWRs could improve safety and smooth operations | 
| 4.5.6. | CAREM: slow progress towards an Argentinian SMR | 
| 4.5.7. | CAREM: passive safety and a conventional approach | 
| 4.5.8. | CAREM/CAREM25: SWOT | 
| 4.5.9. | NuScale: potentially the closest SMR to market in the USA | 
| 4.5.10. | NuScale: a new approach to PWR design | 
| 4.5.11. | NuScale: when will reactors be built? | 
| 4.5.12. | NuScale/VOYGR: SWOT | 
| 4.5.13. | Rolls-Royce SMR: the not-so-small modular reactor | 
| 4.5.14. | Rolls-Royce SMR: designed for export potential | 
| 4.5.15. | Rolls-Royce SMR: small pressure vessel, large power output | 
| 4.5.16. | Rolls-Royce SMR: SWOT | 
| 4.5.17. | Boiling Water Reactors (BWRs): Overview | 
| 4.5.18. | Why are less BWR SMR projects ongoing than PWRs? | 
| 4.5.19. | GE Hitachi's BWRX-300: accelerating project timespans is key | 
| 4.5.20. | GE Hitachi's BWRX-300: compact plant design eases siting difficulties | 
| 4.5.21. | BWR-300: SWOT | 
| 4.5.22. | Pressurized Heavy Water Reactors (PHWRs): Overview | 
| 4.5.23. | PHWR-based SMRs | 
| 4.5.24. | Summary: the Gen III/III+ SMR landscape | 
| 4.5.25. | Comparison of leading Gen III/III+ designs | 
| 4.5.26. | Conclusion: older reactor designs will continue to see wide use in SMRs | 
| 4.6. | Gen-IV reactor designs | 
| 4.6.1. | Gen IV designs: introduction to transformational nuclear technologies | 
| 4.6.2. | High Temperature Gas Reactors (HTGRs): Overview | 
| 4.6.3. | HTGRs: Introduction | 
| 4.6.4. | TRISO: the new paradigm for nuclear fuel? | 
| 4.6.5. | HTGRs: multiple possible generation schemes | 
| 4.6.6. | HTGRs: Rankine vs. Brayton vs. combined cycle generation | 
| 4.6.7. | Comparing benchmarking scores for HTGR types | 
| 4.6.8. | Pebble bed HTGRs: why frequent anomalies? | 
| 4.6.9. | GFRs appear to be high technical performers, yet are let down by power density | 
| 4.6.10. | HTR-PM: the first commercial-scale land-based SMR | 
| 4.6.11. | HTR-PM: use of HALEU, Rankine cycle approach | 
| 4.6.12. | HTR-PM: SWOT | 
| 4.6.13. | U-Battery: distributed nuclear energy for industry | 
| 4.6.14. | U-Battery: how do you target an SMR project? | 
| 4.6.15. | U-Battery: SWOT | 
| 4.6.16. | Liquid Metal Fast Reactors (LMFRs): Overview | 
| 4.6.17. | LMFRs: extensive demonstrator experience has struggled to transfer to commercial use | 
| 4.6.18. | Comparing LMFRs to other Gen IV types | 
| 4.6.19. | Molten Salt Reactors (MSRs): Overview | 
| 4.6.20. | Molten salt reactors perform highly in technology benchmarks - yet adoption has lagged | 
| 4.6.21. | Terrestrial Energy: molten salt SMRs with short-life cores | 
| 4.6.22. | Terrestrial Energy: focus on co-generation as a business model | 
| 4.6.23. | Terrestrial Energy: LEU in a Gen IV reactor | 
| 4.6.24. | ISMR400: SWOT | 
| 4.6.25. | Not every Gen IV design is being considered for SMRs | 
| 4.6.26. | TerraPower: Gen IV designs outside of SMRs | 
| 4.6.27. | Summary: the Gen IV SMR landscape | 
| 4.6.28. | Conclusion: Gen IV designs are likely to find their place in SMRs | 
| 5. | APPLICATIONS FOR SMRS | 
| 5.1. | SMRs and new use-cases for nuclear | 
| 5.2. | Cogeneration: getting the most out of nuclear fuel | 
| 5.3. | Pairing SMRs with industrial zones for efficient use of nuclear cogeneration | 
| 5.4. | Compatibility between processes and reactor types relies on reactor temperature range | 
| 5.5. | Nuclear energy and the hydrogen economy | 
| 5.6. | Desalination using nuclear energy | 
| 5.7. | Nuclear district heating - a proven concept enhanced by SMRs | 
| 5.8. | High temperature reactors open new possibilities for process heat supply | 
| 5.9. | The "nuclear battery": nuclear microreactors | 
| 5.10. | Marine SMRs: portable nuclear power | 
| 5.11. | No smoking: coal-fired power plant repowering | 
| 5.12. | Development status of new SMR use-cases | 
| 5.13. | Summary: SMRs make nuclear energy more versatile |