Nuclear fusion cost models too optimistic to be viable: experts, Pg12

Key Highlights:

• Researchers at ETH Zürich caution that current economic models for nuclear fusion are overly optimistic, potentially misallocating funds.
• The analysis, published in Nature Energy, reveals that projected cost reductions for nuclear fusion are based on arbitrary numbers.
• Experts estimate that even the smallest viable fusion facilities must produce hundreds of megawatts to overcome energy requirements.
• The study suggests nuclear fusion's experience rate is closer to nuclear fission's historical rate of around 2%.

Detailed Insights:

• Current nuclear fusion models assume experience rates between 8% and 20%, but experts believe these figures are too high based on interviews with 28 experts.
• Fusion plants are inherently large and complex, with design complexity potentially exceeding that of nuclear fission reactors.
• The need to tailor fusion plants to local conditions like seismic risk and cooling water access hinders mass production and cost reduction.
• Researchers suggest exploring alternative designs, such as different fuels or smaller reactor configurations, to improve the potential for cost reductions in nuclear fusion.

Scientific/Technical Concepts Involved:

• Nuclear Fusion: A nuclear reaction where two or more atomic nuclei combine to form a single heavier nucleus, releasing energy.
• Experience Rate: The percentage by which a technology’s cost drops every time its global capacity doubles.
• Nuclear Fission: A nuclear reaction in which the nucleus of an atom splits into smaller parts, producing free neutrons and photons, and releasing a large amount of energy.