Nuclear Scaling Success
Prerequisites
Between 1970 and 1990, the world built roughly 350 GW of nuclear capacity. That fleet still generates about 10% of global electricity, more than wind and solar combined produced until 2022. The fastest decarbonization of an electricity grid in history was not Germany's Energiewende; it was France's nuclear buildout.
France and South Korea demonstrate that nuclear power can scale rapidly under the right conditions. France built 56 reactors in 15 years, reaching 70% nuclear electricity by 1990. South Korea built 25 reactors from 1978 to 2016, reaching about 30% nuclear electricity with some of the lowest construction costs in the world. Both achieved this through standardized designs (building the same reactor repeatedly, reducing costs through learning), strong government commitment, and experienced construction workforces.
The contrast: the U.S. and Europe, where each reactor was essentially a custom project with unique designs, shifting regulations, and extended construction times, experienced cost overruns that made nuclear appear uneconomical. The lesson is not that nuclear is inherently expensive but that construction management matters enormously.
Worked Example
France built 63 GW of nuclear capacity at an average cost (in 2020 dollars) of roughly $2,100/kW (derived from World Nuclear Association's EUR1,335/kWe 2010 figure, adjusted for FX and inflation). The U.S. Vogtle 3&4 expansion (2.2 GW) cost roughly $15,000/kW.
- Compare per-kW costs. France: $2,100/kW. Vogtle: $15,000/kW. A 7x difference.
If the U.S. could build at French 1980s costs (adjusted for inflation), what would 63 GW of new nuclear cost?
63,000 MW x $2,100/kW = $132 billion. At Vogtle costs: 63,000 x $15,000 = $945 billion. The difference ($813 billion) is entirely attributable to project management, regulation, and construction efficiency, not to nuclear physics.
Nuclear's track record proves it can scale. Whether it will scale again depends on whether any country can replicate the institutional conditions that made the 1970-1990 buildout possible.
France and South Korea achieved low nuclear construction costs primarily through:
Both countries built the same design repeatedly, improving construction speed and reducing errors with each iteration. This is the "learning curve" effect applied to nuclear construction.
The answer is CLesson complete
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