I-129 DETERMINATION IN EVAPORATOR CONCENTRATE USING OXIDATIVE EXTRACTION AND CHROMATOGRAPHIC RESIN

Authors

  • Thiago César de Oliveira Universidade Federal de Minas Gerais - UFMG Departamento de Engenharia Nuclear - DENU
  • Roberto Pellacani Guedes Monteiro Centro de Desenvolvimento da Tecnologia Nuclear - CDTN
  • Geraldo Frederico Kastner Centro de Desenvolvimento da Tecnologia Nuclear - CDTN
  • Arno Heeren de Oliveira Universidade Federal de Minas Gerais - UFMG Departamento de Engenharia Nuclear - DENU

DOI:

https://doi.org/10.15392/bjrs.v9i1A.1248

Keywords:

Iodine, Evaporator concentrate, Oxidative extraction, Chromatographic resin

Abstract

Determination of long-lived radionuclides is very important for study of the radioactive waste final deposition. In this work will be studied 129I radionuclide which present 1.6 x 107 years half-life, β-particle-emitting (Emax = 194 keV) and X-ray-emitting (E = 29.78 keV). It’s produced primarily from fission of 235U and 239Pu and for fission induced by thermal neutrons. For this reason, radiochemical procedures for 129I determination in evaporator concentrate wastes from nuclear power plants were carried out. The first procedure was based on oxidative extraction and alkaline absorption and the second one, was based on selective extraction using a chromatographic resin in order to separate iodine from its interferents. After the separation steps, the iodine activity was measured by ultra low gamma spectrometry technique. To set up the yield recovery for 129I, a tracer solution of 129I was used in order to follow the behavior of iodine during the separation steps. The yield recovery for iodine was around 75-80% for the first procedure and 80-85% for the second. The two procedures used mutually, ensure a greater efficiency in the separation of iodine from their respective interferents.

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References

Jabbar T., Wallner G., Steier P., (2013) A review on I-129 analysis in air. J Environ Radioact 126C:45-54.

Chia-Lian Tseng and Jiunn-Hsing Chao, Low-level Determination of 129I in Environmental Samples by Neutron Activation, Appl. Radiat. Isto. Vol. 47, No. 8, pp. 723-726, 1996.

J. Handl. Concentration of 129I in the biosphere. Radiochim. Acta 72 (1996), 33.

Fuge R., Soils and iodine deficiency, University of Wales.

https://www.wou.edu/las/physci/taylor/g473/med_geo/fuge_2005.pdf.

Iodine, Radiation Protection. http://www.epa.gov/radiation/radionuclide-basics-iodine Accessed 08 Apr 2019.

Kastner, G. F., Oliveira, T. C. and Monteiro, R. P. G. Radiochemical Determination of 129I in Low and Intermediate Nuclear Wastes, International Nuclear Atomic Conference – INAC 2011.

J.H. Chao et al. Analysis of I-129 in radwastes by neutron activation. Applied Radiation and Iso-topes 51 (1999) 137-143.

Electric Power Research Institute (US). Low-level waste characterization guidelines. Pleasant Hill, 1996. (EPRI-TR-1072).

IAEA - International Atomic Energy Agency. Handbook of nuclear data for safeguards: database extensions, august 2008. INDC(NDS)-0534 Distr. SQ.

Xiaolin Hou et al. A review on speciation of iodine-129 in the environmental and biological sam-ples. Analytica Chimica Acta 632 (2009) 181–196.

Remenec, B., et. all, Determination of 129I using volatilization method and liquid scintillation spectrometry, J Radioanal Nucl Chem (2017) 311:1649-1655.

Zulauf, A. and Happel Steffen, Characterization of an extraction chromatograohic resin for the separation and determination of 36Cl and 129I, J Radioanal Nucl Chem (2010) 286:539-546.

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Published

2021-04-30

How to Cite

de Oliveira, T. C., Monteiro, R. P. G., Kastner, G. F., & de Oliveira, A. H. (2021). I-129 DETERMINATION IN EVAPORATOR CONCENTRATE USING OXIDATIVE EXTRACTION AND CHROMATOGRAPHIC RESIN. Brazilian Journal of Radiation Sciences, 9(1A). https://doi.org/10.15392/bjrs.v9i1A.1248

Issue

Section

The Meeting on Nuclear Applications (ENAN) 2019

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