Effects of gamma irradiation on cobalt hexacyanoferrate(II) ion exchangers

Design alternatives report for the cesium removal demonstration

“…Therefore, -400 kg of CST would also be required to process -25,000 gal of MVST supernate (based on 350 bed volumes processed per column). Based on the distribution coefficients, the quantity of KCoCF is expected to be on the order of 100 times less than that required for CST or SRR, which would mean that -8.8 kg of KCoCF would be required to treat 25 As can be seen, there would only be a difference of -$28,000 in the estimated cost between the KCoCF and SRR required to treat 25,000 gal of supernate. However, the relative difference between the necessary SRR and CST would be -$108,000.…”

“…Therefore, for comparison purposes, the loadings obtained from these batch tests can be used to calculate the minimum quantity of ion-exchange material required. The total quantity of cesium contained in 25,000 gal (-95,000 L) of W- 25 supernate is 133 meq. Based on the above loadings, the total quantity of cesium in W-25 could be removed with 2.7 kg KCoCF, 16.6 kg CST, or 33.3 kg…”

“…A carrier located at ORNL would allow a column of the above size to be transported on site at ORNL without having to rent a carrier from an outside vender. This size column would allow up to 25 were to be allowed for changeout of ion-exchange material, up to an additional 11 weeks would be required for use of the SRR. This would give an estimated time of 15 to 22 weeks to process up to 25,000 gal of supernate.…”

“…This size column would allow up to 25 were to be allowed for changeout of ion-exchange material, up to an additional 11 weeks would be required for use of the SRR. This would give an estimated time of 15 to 22 weeks to process up to 25,000 gal of supernate. It is expected that a similar time fiame would be required for use of CST.…”

“…Factors important in determining the design flow rate of supernate through the system include the size of the ion-exchange column, the required residence time within the column, and the time required to process up to 25,000 gal of supernate.…”