Small, modular reactors [1] have been the dream of nuclear energy for a long time. The technology was proven a long time ago with nuclear submarines which have an outstanding safety track record. What’s stopping them from entering full scale production is a horrible mix of regulatory red tape and political opposition. Chief among the issues is a regulatory framework which is not designed to certify mass-produced reactors.
No one wants to invest the capital to get a manufacturing plant up and running if regulators aren’t willing to allow completed reactors to be commissioned and begin producing energy at a rate that matches the manufacturing rate. The insistence on treating every nuclear site as a unique project subject to years of environmental surveys and extensive, bespoke planning makes modular reactor designs moot as a technology. This is why every reactor gets a new design: they have to go through the process anyway so they might as well try to max out the production they can achieve at that site.
No one wants to invest the capital to get a manufacturing plant up and running if regulators aren’t willing to allow completed reactors to be commissioned and begin producing energy at a rate that matches the manufacturing rate. The insistence on treating every nuclear site as a unique project subject to years of environmental surveys and extensive, bespoke planning makes modular reactor designs moot as a technology. This is why every reactor gets a new design: they have to go through the process anyway so they might as well try to max out the production they can achieve at that site.
[1] https://en.wikipedia.org/wiki/Small_modular_reactor