Standard Test Method for Nondestructive Analysis of Special Nuclear Materials in Homogeneous Solutions by Gamma-Ray Spectrometry

Importancia y uso:

5.1 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.

5.2 It is assumed that the nuclide to be analyzed is in a homogeneous solution (Practice C1168).

5.3 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.

5.4 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.

5.5 Since gamma-ray systems can be automated, the test method can be rapid, reliable, and not labor intensive.

5.6 This test method may be applicable to in-line or off-line situations.

Subcomité:

C26.10

Referida por:

C1490-14R23, C1592_C1592M-21, C1931-23

Volúmen:

12.01

Número ICS:

27.120.30 (Fissile materials and nuclear fuel technology)

Palabras clave:

gamma-ray spectroscopy; nondestructive assay; plutonium; special nuclear material; uranium ;