Evaluating Trace Chemical Emissions from Electric Power Plants

This paper describes a new computer–based model developed for the Electric Power Research Institute (EPRI) to quantify the flows of chemical species in all gaseous, liquid and solid streams entering and leaving a power plant. User–specified parameters allow the model to be tailored to a variety of power plant configurations and site–specific conditions. A unique feature of the model is that all parameters and input data may be characterized probabilistically so that uncertainties can be analyzed rigorously. Illustrative applications are presented to examine the uncertainty in potential air toxic emissions, the effectiveness of current control measures, and areas for future study.