Chemical analysis of new and used 5% TEDA - impregnated carbon

All radioiodine filters in Ontario Hydro's nuclear generating stations use 5% triethylene diamine impregnated carbon as an absorbent. Because replacement carbon, management of used carbon from the filters, and labor to change the carbon are expensive, increased service-life is desirable. Methods to optimize the quality of the new carbon, including analysis methods for new supplies, are described. Analysis of carbon samples taken from filters, to try to determine the reason for deterioration in service, are also discussed