PERFORMANCE EVALUATION OF NaI(Tl) AND LaBr3(Ce) PORTABLE RADIOLOGICAL IDENTIFIERS IN THE IDENTIFICATION OF 226-Ra AND 228-Ra IN SCALES FROM THE PETROLEUM INDUSTRY

Ana Carolina da Cruz dos Anjos da Cruz Izidório; Luciano Santa Rida de Oliveira; Rodrigo Carnero Curzio; Davi Ferreira de Oliveira

doi:10.15392/2319-0612.2022.1872

Authors

Ana Carolina da Cruz dos Anjos da Cruz Izidório Instituto Militar de Engenharia - IME
Luciano Santa Rida de Oliveira Chemical, Biological, Radiological and Nuclear Defese Institute-IDQBRN/CTEx
Rodrigo Carnero Curzio Chemical, Biological, Radiological and Nuclear Defese Institute-IDQBRN/CTEx
Davi Ferreira de Oliveira

DOI:

https://doi.org/10.15392/2319-0612.2022.1872

Keywords:

Radioactive scales, NaI(Tl), LaBr3(Ce)

Abstract

The scales from the oil industry are constantly being studied, due to their formation problem, which reduces the plant's production capacity, and the radioactivity in them, which originates from production wells (NORM), which can lead workers to significant exposures. The extraction process makes these scales radioactive, as the 226-Ra and 228-Ra that are mobilized precipitate with the scales. These are directly responsible for the dose increase to which workers are exposed during routine maintenance. In this study, ten scale samples were analyzed, taken from different parts of an oil production plant, using portable radiological identifiers of NaI(Tl) and LaBr3(Ce) to assess the dose rates and performance of these equipment in detection 226-Ra and 228-Ra. The identification of 226-Ra, was given by its daughter 214-Pb and 214-Bi, energies of 295.222 keV and 351.93 keV; and 609.32 keV, respectively. The identification of 228-Ra, by his daughter 212-Pb and 208-Tl, energies of 238.632 keV; and 583.187 keV and 2614.511 keV, respectively. The energy of 583.187 keV appeared only in the spectra obtained with the PRI of LaBr3(Ce). The energy of 2614.511 keV of 208-Tl was discriminated in all spectra obtained with NaI(Tl). The NaI(Tl) PRI performed better due to its better counting efficiency. The identifiers were able to identify 226-Ra and 228-Ra in inlays containing NORM. It was concluded that the PRIs allow fast analysis even in samples with little mass.

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Author Biography

Ana Carolina da Cruz dos Anjos da Cruz Izidório, Instituto Militar de Engenharia - IME

Graduada em Engenharia de Controle e Automação pelo Centro Universitário de Barra Mansa e Mestre em Engenharia Nuclear pelo Instituto Militar de Engenharia.

References

KAN, A. T.; TOMSON, M. B. Scale predictions for oil and gas production. Journal of Society of Petroleum Engineers, v. 17, p. 362-378, 2012. DOI: https://doi.org/10.2118/132237-PA

JESUS, J. M. F. Monitoramento de NORM na produção offshore de oleo e gás, In: X LATIN AMERICAN REGIONAL CONGRESS ON RADIATION PROTECTION AND SAFETY, Rio de Janeiro, 2013.

OLIVEIRA, D. F.; SANTOS, R. S.; MACHADO, A. S.; SILVA, A. S. S.; ANJOS, M. J.; LOPES, R. T. Characterization of scale deposition in oil pipelines through X-Ray Microfluorescence and X-Ray microtomography, Applied Radiation and Isotopes, 151(2019)247-255. DOI: https://doi.org/10.1016/j.apradiso.2019.06.019

OLIVEIRA, D. F.; NASCIMENTO, J. R.; MARINHO, C. A.; LOPES, R. T. Gamma transmission system for detection of scale in oil exploration pipelines, Nuclear Instruments and Methods in Physics Research A, 784(2015)616-620. DOI: https://doi.org/10.1016/j.nima.2014.11.030

CANDEIAS, J. P.; OLIVEIRA, D. F.; ANJOS, M. J.; LOPES, R. T. Scale analysis using X-ray microfluorescence and computed radiography, Radiation Physics and Chemistry, 95(2014)408-411. DOI: https://doi.org/10.1016/j.radphyschem.2013.03.007

JESUS, S. P.; VITORELLI, J. C.; SILVA, A. X. Aspectos normativos sobre ocorrência natural de material radioativo em rejeitos de petróleo, In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, Santos, 2005.

IAEA-International Atomic Energy Agency Radiation Protection and the Management of Radioactive Waste in the Oil and Gas Industry, Safety Series n. 34, 2003, ISBN 92-0-114003-7.

UNDERHILL, PHILIP T. Naturally Occurring Radioactive Material, Principles and Practice, St Lucie Press, ISBN 1-57444-009-8, 1996.

SMITH, K. P.; BLUNT, D. L.; WILLIAMS, G. P.; TEBES, C. L. Radiological dose

assessment related to management of naturally occurring radioactive materials

generated by the petroleum industry: Argonne, Ill., Argonne National

Laboratory, Publication: ANL/EAD-2, 1996. 65p.

FISHER, R. S. Geologic and geochemical controls on naturally occurring

radioactive materials (NORM) in produced water from oil, gas, and geothermal

operations, Environmental Geosciences, v. 5, n. 3, p. 139-150, 1998. DOI: https://doi.org/10.1046/j.1526-0984.1998.08018.x

COSTA, G. T. P.; GUERRANTE, I. C. ; MOURA, J. C.; AMORIM, F. C. Geochemical signature of NORM waste in Brazilian oil and gas industry, Journal of Environmental Radioactivity, v. 189, p. 202-206, Sept. 2018. DOI: https://doi.org/10.1016/j.jenvrad.2018.04.014

NRPB, NORM in the Oil and Gas Industries, Radiation at Work Series, 1999.

UNSCEAR, Sources and effects of ionizing radiation Vol I, Annex B Exposures of the public and workers from various sources of radiation, 2008. Available at: <https://www.unscear.org/docs/publications/2008/UNSCEAR_2008_Annex-B-CORR2.pdf> Last accessed: 29 may. 2020.

HEATON, B. Field survey instrumentation and radioanalytical procedures for NORM, Applied Radioation Isotopes, v. 49, n. 3, p. 197-204, 1998. DOI: https://doi.org/10.1016/S0969-8043(97)00240-6

OLIVEIRA, L. S. R.; AMORIM, A. S.; BALTHAR, M. C. V.; VILELA, P. R. T.; SANTOS, A.; CARDOSO, D. O.; IZIDÓRIO, A. C. A. C.; PELEGRINELI, S. Q.; SANTOS, F. R.; RIBEIRO, C. A. M.; SILVA, D. C.; SILVA, L. B.; SILVA, S. L. Análise qualitativa de Th-232 em amostras de solo com identificadores radiológicos portáteis NaI(Tl) e LaBR3(Ce), In: INTERNATIONAL JOINT CONFERENCE RÁDIO, 2017, Goiânia.

Managing Naturally Occurring Radioactive Material (NORM) in the oil and gas industry, IOGP Report 412.