Paper Titles in Periodical
International Letters of Chemistry, Physics and Astronomy
Volume 60

Subscribe

Subscribe to our Newsletter and get informed about new publication regulary and special discounts for subscribers!

ILCPA > Volume 60 > Use of Compton Back Scattering Technique for...
< Back to Volume

Use of Compton Back Scattering Technique for Detection of Corrosion in Pipes

Full Text PDF

Abstract:

The multiple Compton backscattering (MCBS) technique has been used to investigate the detection and imaging corrosion under the insulation pipe. An energy source with a mono – energy 0.662MeV of 137Cs has been used. Gamma ray photons have been allowed to be incident vertically on the insulator pipe whose outside diameter, wall and asbestos insulation thickness are (28, 1, 4) cm respectively. The steel pipe has a corrosion defect with a diameter 8 cm. The count rate of scattered γ – photons with scattering angle in the range (130 – 140) degrees has been collected by NaI(Tl) detector with different radius. Assuming the source and detector locations are in the same side from the pipe. Monte Carlo simulation has been written in FORTRAN95 language programming to follow the history of photons. This study provides the ability of this technique to detect and imaging the corrosion under the insulator pipes. The radius of detector which gives good results for corrosion detection and imaging is 6cm among five different selected radiuses.

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 60)
Pages:
58-65
Citation:
I. T. Al-Alawy et al., "Use of Compton Back Scattering Technique for Detection of Corrosion in Pipes", International Letters of Chemistry, Physics and Astronomy, Vol. 60, pp. 58-65, 2015
Online since:
Sep 2015
Export:
Distribution:
References:

J. Zirnhelt, I. Einav and S. Infanzόn, Radiographic evaluation of corrosion and deposits: An IAEA Co-ordinate Research Project, 3rd PAN American Conference for NonDestructive Testing- PANNDT. 02 to 06 June, Rio de Janeiro, RJ, Brazil, (2003).

IAEA - TECDOC - 1445, Development of protocols for corrosion and deposits evaluation in pipes by radiography, International Atomic Energy Agency (IAEA), April, (2005).

P.S. Ong, V. Patel and A. Balasubramanyan, Quantitative characterization of corrosion under insulation, Journal of Nondestructive Evaluation, 16(3) (1997) 135-146.

S. Naito and S. Yamamoto, Novel X-ray backscatter technique for detecting crack below deposit, Toshiba Corporation, Japan. http: /www. ndt. net/article/jrc-nde2009/papers/110. pdf. Fig. 7: The count rate behavior of scattered photons from (MCBS) technique simulation for different detector radius: a) RD=3cm, b) RD=4cm, c) RD=5cm, d) RD=6cm, e) RD=7cm.

Z. Asa'd, M. Asghar, and D. C. Imrie, The measurement of the wall thickness of steel sections using Compton backscattering, Meas. Sci. Technol., 8(4) (1997) 377. doi: 10. 1088/09570233/8/4/003.

Khiem, Le Hong and Khai, Nguyen Tuan, Monte - Carlo simulation for reproducing image of an object using Compton back scattering, Proceedings of the 15th World Conference Non - Destructive Testing (WCNDT), Romma, (2000).

Sheng. Tang Shuo, Detection of buried landmines by Compton backscattering, M. Sc. Thesis in Mechanical Engineering, University of New Brunswick, Fredericton, Canada, September, (2002).

S. Abdul-Majid and Z. Tayyeb, Use of gamma ray backscattering methods for inspection of corrosion under insulation,. 3rd MENDT-Middle East Nondestractive Testing Conference and Exhibition-27-30 Nov., Bahrain, Manama, (2005). www. ndt. net.

S. Abdul-Majid and A. Balamesh, Imaging corrosion under insulation by gamma ray backscattering method,. 18th World Conference Nondestructive Testing, 16-20 April, Durban, South Africa, (2012) 1-7.

V. Grubsky, V. Romanov, E. Patton and T. Jannson, Compton imaging tomography for 3D inspection of complex structurs and real - time process control,. ASNT 22nd Research Symposium, 18-21March. The American Society for Nondestructive Testing, Inc. (ASNT). ASNT ResearchCouncil., (2013).

B.L. Evans, J.B. Martin, L. Burggraf, M.C. Roggemmann and T.N. Hangartner, Demostration of energy - coded Compton scatter tomography with fan beams for one - sided inspection, Nuclear Instruments and Methods in Physics Research A, 480, (2002).

A.J. Ball, C. J. Solomon and J.C. Zarnecki, The response of gamma backscatter density gauges to spatial inhomogensity-an extension of the single scattering model, Nuclear Instruments and Methods in Physics Research B, 140 (1998) 449-462.

J.H. Hubbell and S.M. Seltzer, Tables of x - ray mass attenuation coefficients and mass energy-absorption coefficients from 1keV to 20 MeV for elements Z= 1 to 92 and 48 additional substances of dosimetric interest, (NIST) National Institute of Standard and Technology, Physical Measurement Laboratory, XCOM Photon Cross - Sections Database., (1996).

A.J. Ball, Measuring physical properties at the surface of a comet nucleus,. Ph.D. Thesis. Units for Space Science and Astrophysics, University of Kent, Canterbury, UK, (1997). https: /kar. kent. ac. uk/id/eprint/23088.

R.D. Evans, The Atomic Nucleus, The interaction of electromagnetic radiation with matter: compton scattering and absorption, McGraw-Hill, Inc., (1955) 672-693.

Show More Hide