Study of gas pipelines cracks using transmission and Compton scattering

Autores/as

DOI:

https://doi.org/10.15392/bjrs.v9i2A.432

Palabras clave:

gas pipelines, densitometry, gamma ray source, Compton scattering, cracks

Resumen

Most of the natural gas production is transported through pipelines that require periodic inspections to evaluate the structural integrity of the pipelines due to possible defects caused by degradation that can rupture causing leakage of the fluid causing major disasters. Based on this, the project presents a methodology for predicting cracks in pipe used in gas pipelines. The approximation is based on the principles of gamma densitometry to calculate the density of the pipe wall in order to investigate possible cracks. The natural gas fluid is found in such systems and interferes in the density calculations and therefore will be considered in the simulations. The detection system uses a narrow beam geometry appropriately, comprising gamma ray source (137Cs) and NaI(Tl) 3"x3" detectors for calculating transmitted and scattered photons. Different positioning angles of the detector are investigated.  In this study, the MCNP-X code is used to perform the simulations, in order to develop a counting geometry. Simulations of different thicknesses of the crack were also used to determine the minimum thickness detected by the two NaI(Tl) detectors. Having equipment that can estimate cracks present in pipes used in gas pipelines, in addition to predicting their location can reduce costs and make a major contribution to this sector.

 

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Biografía del autor/a

  • Marcela Ferreira Freitas, Nuclear Engineering Institute
    CENS
  • Cesar Marques Salgado, Nuclear Engineering Institute
    DIRA

Referencias

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ARENDTSZ, N.V. E HUSSEIN, E.M.A., Energy-spectral Compton scatter imaging. I. Theory and mathematics. IEEE Transactions on Nuclear Science NS-42, 1995. p. 2155-2165.

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SHARAF, J.M., Practical aspects of Compton scatter densitometry. Applied Radiation and Iso-topes 54, 2001. p. 801-809.

SILVA M. A., The use of PIGs in the inspection and maintenance of pipelines. Technology & Information Magazine - ISSN 2318-9622, 2015. p.38-52.

TRANSETRO, Natural Gas. 2014. Available at: <http://www.transpetro.com.br/pt_br/areas-de-negocios/gas-natural.html>. Last accessed: 27 may. 2017.

TBG, Pipeline. 2015. Available at: <http://www.tbg.com.br/pt_br/o-gasoduto/tracado.htm> Last accessed: 27 may. 2017.

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Publicado

2021-07-24

Número

Vol. 9 Núm. 2A (Suppl.) (2021)

Sección

XX Meeting on Nuclear Reactor Physics and Thermal Hydraulics (XX ENFIR)

Licencia

Derechos de autor 2021 Brazilian Journal of Radiation Sciences (BJRS)

Creative Commons License

Esta obra está bajo una licencia internacional Creative Commons Atribución 4.0.

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Cómo citar

Study of gas pipelines cracks using transmission and Compton scattering. Brazilian Journal of Radiation Sciences (BJRS), Rio de Janeiro, Brazil, v. 9, n. 2A (Suppl.), 2021. DOI: 10.15392/bjrs.v9i2A.432. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/432. Acesso em: 17 jul. 2025.