It’s not infinitely powerful: It only contributes 5% to the world’s energy supply[159] and even in China, where regulation is lax and public opposition to nuclear is not as big an issue for policy-makers, few reactors are currently being built (_six_ in the last 18 months).
It carries safety risks.[160] While advanced nuclear power in some advanced economies might actually reduce nuclear proliferation risk by using up nuclear material, in other countries, nuclear power might increase proliferation risks.[161]
It will not be used in many emerging economies.[162] Consider that only 1–5 countries in Sub-Saharan Africa are currently plan to have commercial nuclear power and these countries are at least 10 years away from starting construction on nuclear plants.[163]
Continued reliance on outdated nuclear technology might not have the same crucial global technology spillovers as investments in other clean energy (including advanced nuclear). Since the best path towards global decarbonization is through global technology spillover into emerging economies, the actors that have the best emissions score may, surprisingly, not be the most effective actors at reducing the global rate of emissions in the future.
We need more energy R&D to make nuclear better new small modular nuclear reactor designs.
All citations here: https://lets-fund.org/clean-energy/