When adding this mod to any game, the vanilla heat pipe gets severely nerfed. This makes a nuclear reactor in vanilla work at 25% capacity or less. The basic heat pipe is cheaper than vanilla, so why is it more powerful?

The vanilla heatpipe acts as a combination of heat transfer and heat storage. Due to its huge amount of storage it was necessary to split it into the pipe and storage components. Otherwise, a solarthermal setup would takes several hours until it is functional after every change to it.

To fix vanilla nuclear setups, you have to add heat storages as shown in one of the screenshots of this mod.