Determination of iodine-129 in mixed fission products by neutron activation analysis
This report describes an improved method for analyzing /sup 129/I in fission product mixtures originating from fuel reprocessing studies. The method utilizes conventional iodine valence adjustment and solvent extraction techniques to chemically separate /sup 129/I from most fission products. The /sup 129/I is then determined by neutron irradiation and measurement of the 12.4-h /sup 130/I produced by the neutron capture reaction. Special techniques were devised for neutron irradiation of /sup 129/I samples in the pneumatic tube irradiation facilities at the High Flux Isotope (HFIR) and Oak Ridge Research (ORR) reactors. Chemically separated /sup 129/I is adsorbed on an anion exchange resin column made from an irradiation container. The loaded resin is then irradiated in either of the pneumatic facilities to produce /sup 130/I. Sensitivity of the analysis with the HFIR facility (flux: 5 x 10/sup 14/ neutrons cm/sup -2/s/sup -1/) and a 100-s irradiation time is approximately 2 ng. Samples up to 250 mL in volume can be easily processed. The method has been in routine use for about two years and has given good results on samples of reactor fuel solutions and off-gas traps.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 7084087
- Report Number(s):
- ORNL/TM-7449; TRN: 80-019297
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
IODINE 129
ACTIVATION ANALYSIS
ADSORPTION
FISSION PRODUCTS
ION EXCHANGE
NEUTRON REACTIONS
QUANTITATIVE CHEMICAL ANALYSIS
REPROCESSING
RESINS
SEPARATION PROCESSES
SOLVENT EXTRACTION
VALENCE
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL ANALYSIS
EXTRACTION
HADRON REACTIONS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IODINE ISOTOPES
ISOTOPES
MATERIALS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RADIOACTIVE MATERIALS
RADIOISOTOPES
SORPTION
YEARS LIVING RADIOISOTOPES
400101* - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
050800 - Nuclear Fuels- Spent Fuels Reprocessing