Wat?
Where are you getting this from? Europe is completely fine from electricity standpoint. Most are doing deals with countries that have nuclear plants. Finland isn’t rationing anything either.
I think his worry is the percentage of power production in Europe that shifted from Coal to Natural Gas (read Russian Natural Gas).
But I just don't see it, I think governments in Europe would likely buy surplus US/Canada LNG ($$$) or scrable for extra gas from Norway/Qatar/Algeria instead of creating actual outages, specially considering how much coupling you have in EU power networks across countries. [0]
Problem is that you can't just go to Qatar and ask for some LNG delivery tommorow - they are supplying on long term contracts and they need to invest $$$ to increase production. Qatar already told EU (Germany?) that they can only supply extra if they sign a 20 year contract, not 1-2 years.
Every single supplier will squeeze EU countries for Gas money because they know the EU is caught with their pants down.
EU countries will have to budget accordingly to match the new cost of a failed Energy Policy based on hydrocarbon dependency. Hopefully this will accelerate the extinction of the Oil&Gas lobby, both for the environment of our future generations as well as our geo-political resilience.
Nuclear? Not really, there were very little investments in past, new nuclear plants are not being build
In France (largest nuclear power producer) 50% of reactors are shut down for repairs right now, some are broken beyond repair. France is now net electricity importer.