ASTM E748-16
Standard Guide for Thermal Neutron Radiography of Materials

Standard No.

ASTM E748-16

Release Date

2016

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E748-19

Latest

ASTM E748-19

Scope

4.1 This guide covers types of materials to be examined, neutron radiographic examination techniques, neutron production and collimation methods, radiographic film, and converter screen selection. Within the present state of the neutron radiologic art, these practices are generally applicable to specific material combinations, processes, and techniques.

1.1 Purpose—Practices to be employed for the radiographic examination of materials and components with thermal neutrons are outlined herein. They are intended as a guide for the production of neutron radiographs that possess consistent quality characteristics, as well as aiding the user to consider the applicability of thermal neutron radiology. Statements concerning preferred practice are provided without a discussion of the technical background for the preference. The necessary technical background can be found in Refs (1-16).2

1.2 Limitations—Acceptance standards have not been established for any material or production process (see Section 5 on Basis of Application). Adherence to the guide will, however, produce reproducible results. Neutron radiography, whether performed by means of a reactor, an accelerator, subcritical assembly, or radioactive source, will be consistent in sensitivity and resolution only if the consistency of all details of the technique, such as neutron source, collimation, geometry, film, etc., are maintained. This guide is limited to the use of photographic or radiographic film in combination with conversion screens for image recording; other imaging systems are available. Emphasis is placed on the use of nuclear reactor neutron sources.

1.3 Interpretation and Acceptance Standards—Interpretation and acceptance standards are not covered by this guide. Designation of accept-reject standards is recognized to be within the cognizance of product specifications.

1.4 Safety Practices—General practices for personnel protection against neutron and associated radiation peculiar to the neutron radiologic process are discussed in Section 17. Jurisdictional nuclear regulations will also apply.

1.5 Other Aspects of the Neutron Radiographic Process—For many important aspects of neutron radiography such as technique, files, viewing of radiographs, storage of radiographs, film processing, and record keeping, refer to Guide L/D?Ratio of Neutron Radiography Beams

ASTM E94 Standard Guide for Radiographic Examination

ISO 9712 Non-destructive testing — Qualification and certification of NDT personnel

ASTM E748-16 history

• 2019 ASTM E748-19 Standard Guide for Thermal Neutron Radiography of Materials
• 2016 ASTM E748-16 Standard Guide for Thermal Neutron Radiography of Materials
• 2002 ASTM E748-02(2008) Standard Practices for Thermal Neutron Radiography of Materials
• 2002 ASTM E748-02 Standard Practices for Thermal Neutron Radiography of Materials
• 1995 ASTM E748-95 Standard Practices for Thermal Neutron Radiography of Materials