>>robert+(OP)
Let's say the cost of pollution for a tonne of CO2 is about $100. Using some silly and outdated assumptions, solar power is listed at 41 g CO2 / kWh and therefore has a pollution "cost" of 0.4 cents. The cost of a kWh from a solar panel ranges from 0.5 - 4 cents, so adding the two together is still way under the cost per kWh of nuclear power whether or not you add the 12 g CO2 / kWh carbon footprint of nuclear power.