EVALUATION OF ZEOLITE MIXTURES FOR DECONTAMINATION OF HIGH-ACTIVITY-LEVEL WATER IN THE SUBMERGED DEMINERALIZER SYSTEM (SDS) FLOWSHEET AT THE THREE MILE ISLAND NUCLEAR POWER STATION, UNIT 2.

Mixtures of Linde Ionsiv IE-96 and Ionsiv A-51 zeolites were evaluated for use in the Submerged Demineralizer System (SDS). For decontaminating approximately equals 3000 m**3 of high-activity-level water in the containment building sump. Small-scale, tracer-level column tests were made using various mixtures of zeolites to evaluate the capability for simultaneous removal of cesium and strontium. A hot cell column loading test was made for an equal parts mixture of removing cesium and strontium from a sample of TMI-2 sump water. A computerized mathematical model of the mixed-bed SDS system was used to evaluate the test data in order to select a zeolite mixture and predict system performance.