I’m not certain what you mean by that but if you are asking how small they would be and where they would be placed the normal recommendation would be you would want a warehouse sized facility with an Olympic sized swimming pool to submerse a standard container sized reactor. You would probably house one to three reactors per facility. You would probably want an exclusion zone of 1 mi. Minimum. Depending on the model a single reactor would be able to power roughly 50,000 to 100,000 homes. Ideally you would build one of these 20 miles from a city. Plug in the SMRs and after 15 to 20 years unplug them and replace with newer models ship them off to a long-term storage facility and eventually process them for fuel once a we have functional thorium salt reactors at scale.

We could shut down every coal fired plant and replace the coal fired apparatus with a modern reactor and keep the current steam turbine facility in place. But tell me more about how keeping Cole burning and spewing radioactive nuclei into the atmosphere as preferable than hypothetical meltdown situations.