research
Study of gas pipelines cracks using transmission and scattering measures with nuclear technique
- Publication date
- Publisher
- IEN
Abstract
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