Nuclear power does not play well with renewables. It's a steady baseload source, but solar and wind are highly variable and need something that can switch on or off to fill in the gaps. You can't turn on and off a nuclear plant throughout the day. So even though (ignoring disposal challenges), nuclear is a clean source of energy, it probably has no place in a highly VRE dominated future.
do you know where one can find typical frequency or impulse response plots? both for total input control to energy network or partial (control -> heat, heat -> turbine etc) responses would be interesting, for real/typical systems