ISO-12721 › Non-destructive testing -- Thermal neutron radiographic testing -- Determination of beam L/D ratio

ISO-12721 - 1ST EDITION - CURRENT


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This International Standard defines an empirical technique for the measurement of the effective collimation ratio and effective L/D of thermal neutron radiography beams for values between 20 and 1 000. The technique is based upon analysis of a neutron radiographic image and is independent of measurements and calculations based on physical dimensions of the collimator system. The device described in this International Standard has been developed and tested using Gd foil converters with a single emulsion, high resolution film in vacuum cassettes.

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19.100 (Non-destructive testing Including testing equipment: industrial apparatus for X-ray and gamma radiography, penetrant flaw detectors, etc. Non-destructive testing of welded joints, see 25.160.40 Industrial radiographic films, see 37.040.25 Non-destructive testing of metals, see 77.040.20)

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Document Number

ISO 12721:2000

Revision Level

1ST EDITION

Status

Current

Publication Date

April 15, 2000

Committee Number

ISO TC 135/SC 5/WG 4