The only truly valid image quality indicator is a material or component, equivalent to the part being neutron radiographed, with a known standard discontinuity, inclusion, omission or flaw (reference standard comparison part). The SI is designed to substitute for the reference standard, providing qualitative information on hole and gap sensitivity in a single unit. Fabrication in accordance with this practice is vital for accurate and consistent measurements.

This practice shall be followed for the fabrication of all SIs to be used with Method E545 to determine image quality in direct thermal neutron radiography.

1. Scope

1.1 This practice covers the fabrication of Sensitivity Indicators (SI), which can be used to determine the relative quality of radiographic images produced by direct, thermal neutron radiographic examination.

1.2 The values stated in inch-pound units are regarded to be standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

E543 Specification for Agencies Performing Nondestructive Testing

E545 Test Method for Determining Image Quality in Direct Thermal Neutron Radiographic Examination

E748 Practices for Thermal Neutron Radiography of Materials

E1316 Terminology for Nondestructive Examinations

Keywords

direct method; image quality indicator; neutron radiography; sensitivity indicator (SI); Fabricated materials; IQI (image quality indicators); Neutron radiographic testing; Radiographic examination; Sensitivity criterion/response;

ICS Code

ICS Number Code 37.040.25 (Radiographic films)

Citing ASTM Standards

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