I don't know a whole lot about SMRs but it would depend on how scalable they are. If they are anything like our Cando reactors, the answer is 'not much' as they are designed to operate at close to 100% thermal efficiency. I don't know if there is an accepted formula for converting 'household' to population, but it seems plunking an SMR designed to power 200,000 households into the City of Iqaluit , population 7500, might be a tad overkill.