7. UNUSUAL FEATURES OF THE PROGRAM
The SCENARIOS code is designed to accept the fuel cycle data for nuclear power plants in any degree of detail. This may vary from the simplest extreme of providing only steady-state reload and discharge data for model plants, to the other extreme of providing data for each batch of fuel loaded and discharged during the entire lifetime of each individual plant. For most calculations, either extreme would be undesirable. The simple extreme would ignore initial loading requirements, the composition changes during the approach to steady-state, and the final core discharge at plant retirement. The other extreme, while providing all the necessary details, would require a burdensome amount of input data, and would introduce a high degree of precision into calculations which have a low degree of accuracy (due to the uncertain nature of forecasting).