Grid requirements for frequency control, load regulation, and load following can be met by the ABWR. The automatic process control systems in the ABWR enable the reactor to respond to changes in turbine/load demand so that the generated steam fow matches that required by the turbine to maintain proper load and frequency operation.
In the 65% to 100% power range, the power change rate capability is approximately 1% per second using only re-circulation flow changes. Below 65%, the power change rate is approximately 2.5% per minute using control rod motion. All of these operations are significantly faster than required to respond to load and frequency changes.