Nope .
You have stated that baseload nuclear would have to run at 90% .
That means very little input from renewables to allow that to happen .
Nuclear would take decades to build. With no more renewables built we would have to fill the gap with fossil in the interim. That would be our only option.
The cats out of the bag for the nuclear shills.
As the chart shows , renewables are taking quite a large bite out of coal baseload . Less renewables to create space for nuclear means more coal for longer .
https://opennem.org.au/energy/nem/?range=1d&interval=30m&view=discrete-time
