ASTM E748-95

Designation: E 748 – 95 An American National Standard
Standard Practices for
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Thermal Neutron Radiography of Materials
This standard is issued under the fixed designation E 748; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope and Technology, and to applicable state and local codes.
1.5 Other Aspects of the Neutron Radiographic Process—
1.1 Purpose—Practices to be employed for the radiographic
For many important aspects of neutron radiography such as
examination of materials and components with thermal neu-
technique, files, viewing of radiographs, storage of radio-
trons are outlined herein. They are intended as a guide for the
graphs, film processing, and record keeping, refer to Guide
production of neutron radiographs that possess consistent
E 94. (See Section 2.)
quality characteristics, as well as aiding the user to consider the
1.6 The values stated in either SI or inch-pound units are to
applicability of thermal neutron radiology (radiology, radio-
be regarded as the standard.
graphic, and related terms are defined in Terminology E 1316).
1.7 This standard does not purport to address all of the
Statements concerning preferred practice are provided without
safety concerns, if any, associated with its use. It is the
a discussion of the technical background for the preference.
responsibility of the user of this standard to establish appro-
The necessary technical background can be found in Refs
2 priate safety and health practices and determine the applica-
(1-16).
bility of regulatory limitations prior to use. (For more specific
1.2 Limitations—Acceptance standards have not been es-
safety information see 1.4.)
tablished for any material or production process (see Section 5
on Basis of Application). Adherence to the practices will,
2. Referenced Documents
however, produce reproducible results that could serve as
2.1 ASTM Standards:
standards. Neutron radiography, whether performed by means
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E 94 Guide for Radiographic Testing
of a reactor, an accelerator, subcritical assembly, or radioactive
E 543 Practice for Evaluating Agencies that Perform Non-
source, will be consistent in sensitivity and resolution only if
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destructive Testing
the consistency of all details of the technique, such as neutron
E 545 Method for Determining Image Quality in Direct
source, collimation, geometry, film, etc., is maintained through
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Thermal Neutron Radiographic Examination
the practices. These practices are limited to the use of photo-
E 803 Method for Determining the L/D Ratio of Neutron
graphic or radiographic film in combination with conversion
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Radiography Beams
screens for image recording; other imaging systems are avail-
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E 1316 Terminology for Nondestructive Examinations
able. Emphasis is placed on the use of nuclear reactor neutron
E 1496 Test Method for Neutron Radiographic Dimensional
sources.
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Measurements
1.3 Interpretation and Acceptance Standards—
2.2 ASNT Standard:
Interpretation and acceptance standards are not covered by
SNT-TC-1A Recommended Practice for Personnel Qualifi-
these practices. Designation of accept-reject standards is rec-
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cation and Certification
ognized to be within the cognizance of product specifications.
2.3 ANSI Standard:
1.4 Safety Practices—General practices for personnel pro-
ANSI/ASNT-CP-189 Standard for Qualification and Certi-
tection against neutron and associated radiation peculiar to the
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fication of Nondestructive Testing Personnel
neutron radiologic process are discussed in Section 17. For
2.4 Military Standard:
further information on this important aspect of neutron radiol-
MIL-STD-410 Nondestructive Testing Personnel Qualifica-
ogy, refer to current documents of the National Committee on
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tion and Certification
Radiation Protection and Measurement, the Code of Federal
Regulations, the U.S. Nuclear Regulatory Commission, the
3. Terminology
U.S. Department of Energy, the National Institute of Standards
3.1 Definitions—For definitions of terms used in these
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These practices are under the jurisdiction of ASTM Committee E-7 on
Annual Book of ASTM Standards, Vol 03.03.
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Nondestructive Testing and are the direct responsibility of Subcommittee E07.05 on
Available from the American Society for Nondestructive Testing, 1711 Arlin-
Neutron Radiography. gate Lane, P.O. Box 28518, Columbus, OH 43228-0518.
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Current edition approved Dec. 10, 1995. Published February 1996. Originally Available from American National Standards Institute, 11 West 42nd St., 13th
published as E 748 – 80. Last previous edition E 748 – 90. Floor, New York, NY 10036.
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The boldface numbers in parentheses refer to the list of references at the end of Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
these practices. Robbins Ave.
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