Leach resistance, of iodine

Leach Resistance of Iodine Compounds in Portland Cement... 

The Agl-cement exhibited the best leach resistance of all forms tested. Figure 1 presents the results for the static and dynamic leach tests of Agl cements. The leach rate unit of cm/d may be converted to fraction leached per day by multiplying by the surface area-to-volume ratio. Using the data presented in Figure 1 for the dynamic leach test between days 40 and 100 and assuming a linear extrapolation, over 4000 years are required to leach 1% of the iodine from a 208 L (55 gal) cement monolith. A 208 L steel drum is the typical waste container used for disposal of low activity radioactive waste and is used in this report as the standard waste package. 

Our studies have shown that there is a considerable difference in stability and leach resistance among the various iodine compounds in Portland III cement. Of the compounds examined, Agl had the best leach resistance followed by AgZI, 63(103)2, Ca(I03)2 ... 

---