Use este identificador para citar ou linkar para este item: http://carpedien.ien.gov.br:8080/handle/ien/2309
Tipo: conferenceObject
Título: Study of gas pipelines cracks using transmission and scattering measures with nuclear technique
Autor(es): Salgado, Cesar Marques
Freitas, Marcela
Resumo: 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.
Palavras-chave: Gas pipelines
Nuclear technique
Gamma densitometry
Gamma-ray
Idioma: eng
País: Brasil
Editor: Instituto de Engenharia Nuclear
Sigla da Instituição: IEN
Tipo de Acesso: openAccess
URI: http://carpedien.ien.gov.br:8080/handle/ien/2309
Data do documento: Out-2017
Aparece nas coleções:Aplicação de técnicas nucleares na indústria, saúde e meio ambiente - Trabalhos de Congresso

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
ARTIGO INAC 30.pdf547,11 kBAdobe PDFVisualizar/Abrir


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.

Ferramentas do administrador