Context:
- Experts have raised concerns over overly optimistic cost projections of nuclear fusion technology.
Key Highlights:
- Scientific Principle
- Nuclear Fusion: Combining atomic nuclei to release large amounts of energy.
- Considered a clean and sustainable energy source.
- Key Findings
- Study by ETH Zürich (Nature Energy) questions cost assumptions.
- Fusion cost reduction estimates (8–20%) are overestimated.
- Realistic experience rate closer to ~2% (similar to nuclear fission).
- Technical & Economic Challenges
- Fusion plants require hundreds of megawatts to be viable.
- Highly complex and large-scale infrastructure.
- Customisation needed due to local conditions (seismic risk, cooling water).
- Stakeholders
- Governments, energy sector, climate policymakers, research institutions.
- Significance / Concerns
- Risk of misallocation of climate mitigation funds.
- Fusion may not be commercially viable in near future.
Relevant Prelims Points:
- Nuclear Fusion vs Fission:
- Fusion: Combines nuclei, higher energy, less waste.
- Fission: Splits nucleus, used in current reactors.
- ITER Project:
- International collaboration for fusion research (France).
- Experience Rate:
- Cost reduction with increased production scale.
Relevant Mains Points:
- Role in Energy Transition
- Fusion seen as long-term clean energy solution.
- Could reduce dependence on fossil fuels.
- Challenges
- Technological complexity and high costs.
- Lack of commercial scalability.
- Competition from renewables (solar, wind).
- Policy Concerns
- Risk of diverting funds from proven renewable technologies.
- Need for balanced energy investment strategy.
- Way Forward
- Continue R&D with realistic expectations.
- Invest in alternative fusion designs (compact reactors, new fuels).
- Prioritise renewables + storage technologies in short term.
UPSC Relevance:
- GS Paper 3: Science & Technology, Energy, Environment
- Prelims: Fusion vs Fission, ITER, Energy Technologies