Models for calculating the effects of isotopic exchange, radioactive decay, and of recycle in removing iodine from gas and liquid streams

Technical Report · Mon Sep 01 00:00:00 EDT 1975

DOI:https://doi.org/10.2172/4189640· OSTI ID:4189640

Davis, W Jr

Different decontamination factors for $sup 129$I and $sup 131$I are frequently invoked in environmental impact reports concerned with nuclear fuel recycle. Selected differences, or ratios, have not been justified on the basis of mathematical models or experimental data. A description is given of the origins of these differences in terms of isotopic exchange and material balance equations for the short- and long-lived (or stable) isotopes. The ratios of decontamination factors can be calculated when there is complete attainment of isotopic exchange between gas- or liquid-phase iodine and iodine sorbed by a solid or liquid. If there is no exchange, decontamination factors are isotope- independent unless material recycle occurs within the system. Between these extremes, there can be decontamination factors whose explanation requires experimental determination of the extent of exchange. The model applies to other radioactive isotopes of iodine as well as to other elements with short- and long- lived (or stable) isotopes. (auth)

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-33-001411
• OSTI ID: 4189640
• Report Number(s): ORNL-5060
• Resource Relation: Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

N52200* -Nuclear Materials & Waste Management-Disposal & Storage
N40230 -Chemistry-Inorganic
Organic
& Physical Chemistry-Isotope Exchange & Isotope Separation
051102*
*IODINE 129- ISOTOPIC EXCHANGE
*IODINE 131- ISOTOPIC EXCHANGE
*RADIOACTIVE WASTE PROCESSING- LIQUID WASTES
DECAY
DECONTAMINATION
ISOTOPE RATIO
MATHEMATICAL MODELS
NUCLEAR FUELS
REPROCESSING
SILVER COMPOUNDS
ZEOLITES