Mars is very cold, so all this waste heat from nuclear reactor can be used to heat spaces, but nuclear reactors needs enriched fuel to work, which is dangerous

Mars is very cold, so all this waste heat from nuclear reactor can be used to heat spaces, but nuclear reactors needs enriched fuel to work, which is dangerous to transport. If Petrovskite Solar Cells will work on Mars reliably, they can be produced directly on Mars and used together with sand batteries for stable supply of energy and heat.