Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques

Zergoug, T; Nedjar, A; Mokeddem, M Y; Mammou, L

doi:10.1063/1.2906061

Title: Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques

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Abstract

Since the construction of NUR reactor neutron radiography facility in 1991, only transfer exposure method was used as a non destructive technique. The reason is the excess of gamma rays in the neutron beam. To improve radiation performances of the NR system, a stainless steal hollow conical cylinder is introduced at the bottom of the facility beam port, this filter reduce gamma infiltration through the edges of the NR structure without disturbing neutron beam arriving from the in pool divergent collimator. First results confirm our prediction; a gamma rays diminution and a relatively stable neutron flux at the point object are confirmed, consequently the n/{gamma} ratio reaches a value of 2.104 n/cm{sup 2} mR. Radiograms obtained by using the direct exposure method reveal the feasibility of the technique in the new NR configuration facility, but a weak resolution and contrast of the image is observed. In this paper, we describe a procedure to improve the image quality obtained by direct exposure technique. The process consists of using digitized images obtained by several exposure techniques (NR, gamma radiography or X radiography) for a comparison study and then better image definition can be attained.

Authors:

Zergoug, T; Nedjar, A; Mokeddem, M Y; Mammou, L ^[1]

Centre de Recherche Nucleaire de Draria, (CRND) BP 43 Draria 16000, Algiers (Algeria)

Publication Date:: Mon Mar 17 00:00:00 EDT 2008

OSTI Identifier:: 21136849

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 989; Journal Issue: 1; Conference: International conference on neutron and X-ray scattering 2007, Serpong and Bandung (Indonesia), 23-31 Jul 2007; Other Information: DOI: 10.1063/1.2906061; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; COMPARATIVE EVALUATIONS; GAMMA RADIATION; GAMMA RADIOGRAPHY; IMAGE PROCESSING; IMAGES; NEUTRON BEAMS; NEUTRON FLUX; NEUTRON RADIOGRAPHY; NEUTRONS; NUR REACTOR; PERFORMANCE; RESOLUTION

Citation Formats


                    Zergoug, T, Nedjar, A, Mokeddem, M Y, and Mammou, L. Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques.  United States: N. p., 2008. 
        Web.  doi:10.1063/1.2906061.

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                    Zergoug, T, Nedjar, A, Mokeddem, M Y, & Mammou, L. Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques.  United States.  https://doi.org/10.1063/1.2906061

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                    Zergoug, T, Nedjar, A, Mokeddem, M Y, and Mammou, L. 2008.  
        "Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques".  United States.  https://doi.org/10.1063/1.2906061.

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@article{osti_21136849,

  title        = {Improvements in the Image Quality of Neutron Radiograms of NUR Neutron Radiography Facility by Using Several Exposure Techniques},

  author       = {Zergoug, T and Nedjar, A and Mokeddem, M Y and Mammou, L},

  abstractNote = {Since the construction of NUR reactor neutron radiography facility in 1991, only transfer exposure method was used as a non destructive technique. The reason is the excess of gamma rays in the neutron beam. To improve radiation performances of the NR system, a stainless steal hollow conical cylinder is introduced at the bottom of the facility beam port, this filter reduce gamma infiltration through the edges of the NR structure without disturbing neutron beam arriving from the in pool divergent collimator. First results confirm our prediction; a gamma rays diminution and a relatively stable neutron flux at the point object are confirmed, consequently the n/{gamma} ratio reaches a value of 2.104 n/cm{sup 2} mR. Radiograms obtained by using the direct exposure method reveal the feasibility of the technique in the new NR configuration facility, but a weak resolution and contrast of the image is observed. In this paper, we describe a procedure to improve the image quality obtained by direct exposure technique. The process consists of using digitized images obtained by several exposure techniques (NR, gamma radiography or X radiography) for a comparison study and then better image definition can be attained.},

  doi          = {10.1063/1.2906061},

  url          = {https://www.osti.gov/biblio/21136849},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 989,

  place        = {United States},

  year         = {Mon Mar 17 00:00:00 EDT 2008},

  month        = {Mon Mar 17 00:00:00 EDT 2008}

}

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