Abstract: An improved display for displaying in real time the temperature profile of the heat transfer medium in one or more implementations of heat engine cycles in a nuclear or fossil-fuel power plant. Clear and convenient graphic illustration of the principal operating parameters and key system status data pertaining to the power plant is provided by an Integrated Plant Iconic Display on a single computer screen. As many as four heat engine cycles are each represented by a "Process Icon", providing a graphical illustration of key measured and computed data, such that the Process Icon provides a real-time model of current operations. As each of the Process Icons appear on one display screen, their relative performance is readily observed by an operator viewing the single display on which they appear. A System Icon on the same screen shows the condition of the principal pumps and valves, and other components of the coolant systems.

Abstract: An integrated display called an iconic display is disclosed, which contains an image of the thermodynamic heat transfer process for a pressurized water nuclear power plant from the heat source (the reactor) to the heat sink (the environment). Shown is a main curve comprising a saturated steam line and a saturated water line, superimposed upon which are symbols indicating such operating data as water level and temperatures, and the status of various pumps and valves. By analyzing the graphic presentation and the relationships between the various symbols, the status of the thermodynamic cycle of the plant can be determined and trends monitored. Real time data inputs can be used, or hypothetical situations can be constructed. Illustrated are two actual undesirable plant conditions from nuclear power mishaps which graphically demonstrate the operation and advance in the art set forth in the invention.