Chemistry on Hot Aerosol Filters

Hickmann, et al. [29] investigated how different chlorination agents (HC1, CI2, SOCI2 and CCI4) affect the appearance of the thermochromatogram of fission products of uranium see Sect. 1.5.3 and Fig. 1.22 herein. The reagents, as well as Ln and Zr among the separated fission products, are of interest in the context of the present discussion. These important data deserve a detailed analysis of what concerns the chemical mechanisms involved. 

3 Scavenging of Gaseous Chemically Active and Radioactive Impurities 

A principal advantage of working with the short-lived nuclides in gaseous phase is a safe upper limit for the permissible concentration of any chemically active contamination. Indeed, the chemical fate of the recoil atom cannot be affected when its collisions with the contaminations are improbable because of the short lifetime. Equation 3.4 shows that the safe concentrations are smaller than about 109/fi/2 cm-3. 

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