ASTM C1221-10
Standard Test Method for Nondestructive Analysis of Special Nuclear Materials in Homogeneous Solutions by Gamma-Ray Spectrometry
- Standard No.
- ASTM C1221-10
- Release Date
- 2010
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM C1221-10(2018)
- Latest
- ASTM C1221-10(2018)
- Scope
This test method is a nondestructive means of determining the nuclide concentration of a solution for special nuclear material accountancy, nuclear safety, and process control.
It is assumed that the nuclide to be analyzed is in a homogeneous solution (Practice C1168).
The transmission correction makes the test method independent of matrix (solution elemental composition and density) and useful over several orders of magnitude of nuclide concentrations. However, a typical configuration will normally span only two to three orders of magnitude because of detector dynamic range.
The test method assumes that the solution-detector geometry is the same for all measured items. This can be accomplished by requiring that the liquid height in the sidelooking geometry exceeds the detector field of view defined by the collimator. For the upward-looking geometry, a fixed solution fill height must be maintained and vials of identical radii must be used unless the vial radius exceeds the field of view defined by the collimator.
Since gamma-ray systems can be automated, the test method can be rapid, reliable, and not labor intensive.
This test method may be applicable to in-line or off-line situations.
1.1 This test method covers the determination of the concentration of gamma-ray emitting special nuclear materials dissolved in homogeneous solutions. The test method corrects for gamma-ray attenuation by the solution and its container by measurement of the transmission of a beam of gamma rays from an external source (Refs. (1), (2), and (3)).
1.2 Two solution geometries, slab and cylinder, are considered. The solution container that determines the geometry may be either a removable or a fixed geometry container. This test method is limited to solution containers having walls or a top and bottom of equal transmission through which the gamma rays from the external transmission correction source must pass.
1.3 This test method is typically applied to radionuclide concentrations ranging from a few milligrams per litre to several hundred grams per litre. The assay range will be a function of the specific activity of the nuclide of interest, the physical characteristics of the solution container, counting equipment considerations, assay gamma-ray energies, solution matrix, gamma-ray branching ratios, and interferences.
1.4 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. For specific hazards, see Section 9.
ASTM C1221-10 Referenced Document
- ANSI N42.14 Calibration and Use of Germanium Spectrometers for the Measurement of Gamma-Ray Emission Rates of Radionuclides
- ASTM C1133 Standard Test Method for Nondestructive Assay of Special Nuclear Material in Low Density Scrap and Waste by Segmented Passive Gamma-Ray Scanning
- ASTM C1168 Standard Practice for Preparation and Dissolution of Plutonium Materials for Analysis
- ASTM C1490 Standard Guide for the Selection, Training and Qualification of Nondestructive Assay (NDA) Personnel
- ASTM C1592 Standard Guide for Nondestructive Assay Measurements
- ASTM C1673 Standard Terminology of C26.10 Nondestructive Assay Methods
- ASTM E181 Standard Test Methods for Detector Calibration and Analysis of Radionuclides
ASTM C1221-10 history
- 2018 ASTM C1221-10(2018) Standard Test Method for Nondestructive Analysis of Special Nuclear Materials in Homogeneous Solutions by Gamma-Ray Spectrometry
- 2010 ASTM C1221-10 Standard Test Method for Nondestructive Analysis of Special Nuclear Materials in Homogeneous Solutions by Gamma-Ray Spectrometry
- 1992 ASTM C1221-92(2004) Standard Test Method for Nondestructive Analysis of Special Nuclear Materials in Homogeneous Solutions by Gamma-Ray Spectrometry
- 1992 ASTM C1221-92(1998) Standard Test Method for Nondestructive Analysis of Special Nuclear Materials in Homogeneous Solutions by Gamma-Ray Spectrometry
