Green Energy

The problem is that Belgium finished all, but one reactor within a decade and they provide about half of Belgiums electricity production. So with them aging and becoming less reliable as all old infrastructure does, they need to be shut down. At the time the reactors had a planned lifetime of 40 years and when shut down they are 50 years old. Also only three of the five reactors will be shut down by 2025, the other two will run until 2035, when they hit 50 years of operation.

So basicly a lack of foresight of Belgian governments for a long time, to not work on proper alternatives.