That's why you don't shutdown nuclear plants before having a solid backup plan. Or better not shutdown at all.
The price hike comes because of the hiking gas prices.
We're importing 9392MW also.
It does not matter that plants are in maintenance, that is the normal state of complex systems like nuclear plants and a very desirable one. Sure, we could do better and close the last two coal factories to get 0% of coal modulo imports. That is still very different from 0% of nuclear. :)