can start in 15-30 minutes;
* the steam turbine (ST) heating process takes from 1 hour (for hot startup) to 6 hours (for cold startup);
* ST load increase takes additional 20 minutes (if "hot") to 2 hours ("cold").

Nuclear power plants have the longest startup times of few days for the cold startup (less than a week). A typical boiling water reactor goes through the following stages:
* establishment