The radiation from the destroyed nuclear plants will destroy the living biosphere of the entire planet. For like 100,000 years. Maybe some radiation eating fungi can survive that. Otherwise, the only remaining life will be that currently trapped well below ground. So, no plants = no water, and no air. For a very long time. The mole people might be able to come back up one day and live under domes, but the planet will look like Mars. Assuming humans can live that way at all. More likely is the tunnels will become tombs. Some alien archeologists far into the future will come and dig it up for artifacts.