Where can I find the different fuel prices that are used in SAInt?
The fuel prices, along with any other properties, can be found by checking the relevant FUEL object. For instance, in the ENET39, there are three such objects, FUEL.URANIUM, FUEL.NATURAL_GAS, and FUEL.COAL. Each of these are attached to multiple fuel generators (FGENS), depending on the type of fuel the generators consume; i.e., FGEN.MILLSTONE is a nuclear generator, which draws from FUEL.URANIUM.
The FUEL object has event properties and this is where the fuel price (FuelPrice) can be found. This can be changed during a scenario with an event to model price fluctuations! After the scenario is executed, you can observe the rates of consumption of FUEL objects, which will be a result of the related FGEN generation and heat rate.
Happy modeling!