Understanding NRT- Reading 1- 2 of 2- Radiogaphic Testing A

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Real-time Radiography Real-time radiography (RTR), or real-time radioscopy, is a nondestructive test (NDT) method whereby an image is produced electronically rather than on film so that very little lag time occurs between the item being exposed to radiation and the resulting image. In most instances, the electronic image that is viewed, results from the radiation passing through the object being inspected and interacting with a screen of material that fluoresces or gives off light when the interaction occurs. The fluorescent elements of the screen form the image much as the grains of silver form the image in film radiography. The image formed is a "positive image" since brighter areas on the image indicate where higher levels of transmitted radiation reached the screen. This image is the opposite of the negative image produced in film radiography. In other words, with RTR, the lighter, brighter areas represent thinner sections or less dense sections of the test object. Charlie Chong/ Fion Zhang
Real-time radiography is a well-established method of NDT having applications in automotive, aerospace, pressure vessel, electronic, and munition industries, among others. The use of RTR is increasing due to a reduction in the cost of the equipment and resolution of issues such as the protecting and storing digital images. Since RTR is being used increasingly more, these educational materials were developed by the North Central Collaboration for NDT Education (NCCE) to introduce RTR to NDT technician students. Charlie Chong/ Fion Zhang
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Understandings NRT - Reading 1 Part
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NDT for Upstream Charlie Chong/ Fio
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NDT for Upstream Charlie Chong/ Fio
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Charlie Chong/ Fion Zhang Fion Zhan
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BOK NR- Neutron Radiographic Testin
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4. Interpretation/Evaluation • Im
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Charlie Chong/ Fion Zhang http://gr
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Charlie Chong/ Fion Zhang
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Chapter 6: Radio Isotope (Gamma) So
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Cobalt-60 Charlie Chong/ Fion Zhang
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Cobalt-60, 60 Co, is a synthetic ra
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Decay of Co-60 The decay scheme of
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γ-Ray Spectrum of Cobalt-60 Charli
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Isomers Nuclei can have the same ne
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Half-lives (example: Gd) Charlie Ch
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Advantages of gamma ray sources inc
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Radio Isotope - Th232 Half life: 1.
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Radio Isotope - Co60 Half life: 192
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12.7μm sensitive silver halide blu
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Arithmetic of Exposure RELATIONS OF
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Milliamperage-Distance Relation The
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When very low kilovoltages, say 20
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Tabular Solution of Milliamperage-T
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Milliamperage-Time and Distance Rel
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THE RECIPROCITY LAW In the sections
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Approximate Corrections for Recipro
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Film Packaging Radiographic film ca
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Film Handling X-ray film should alw
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Subject contrast is determined by t
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Definition Radiographic definition
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Film should be located in a light,
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Sensitometric checks may be carried
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Page 89 and 90: General Welding Discontinuities The
Page 91 and 92: Cluster porosity is caused when flu
Page 93 and 94: Incomplete penetration (IP) or lack
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Page 103 and 104: Oxide inclusions are usually visibl
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Page 109 and 110: Shrinkage is a form of discontinuit
Page 111 and 112: Dendritic shrinkage is a distributi
Page 113 and 114: Cracks are thin (straight or jagged
Page 115 and 116: Core shift shows itself as a variat
Page 117 and 118: Mottling is a radiographic indicati
Page 119 and 120: Incomplete penetration, as the name
Page 121: Root edge condition shows the penet
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Page 127 and 128: Read More: https://www.nde-ed.org/T
Page 129: Good Luck! Charlie Chong/ Fion Zhan
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Understanding NRT- Reading 1- 2 of 2- Radiogaphic Testing A

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