A system designed from scratch should minimise emissions, costs, risks, land use, supply security, and resilience. Nuclear offers high energy density and stable low-carbon generation, but requires capital, strong institutions, waste management, expertise, and public consensus. In countries with good regulatory and industrial conditions it may make sense; in others, renewables, grids, and storage might prevail. The most substantiable answer is: yes as a portfolio option, not as a universal solution.
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100.
If we were to start the world energy system from scratch, would it still make sense to build nuclear power plants?
Probably yes in a diversified mix, but not everywhere.
