The naivité of those divers is troubling, particularly the one guy who already had thyroid cancer (which is closely related to radiation damage) and still thinks that he might have gotten it anyway. Yeah right.
I don’t know if similar jobs exist in the remaining German nuclear power plants. I hope that they don’t send people into contaminated water but have robots do those tasks instead, but again this is not something they’ll likely talk about openly. Still, another reason for getting out of nuclear power is that nobody should have to do such hazardous and possibly lethal jobs.
As for alternatives, the MIT’s Technology Review reports about a cheaper way to store energy generated by solar power plants.