ASTM C1458-00 - 10.1.2000
 
1. Scope

1.1 This test method describes the nondestructive assay (NDA) of plutonium, tritium, and 241Am using heat flow calorimetry. For plutonium the range of applicability corresponds to 1 g to > 2000 g quantities while for tritium the range extends from 0.001 g to > 10 g. This test method can be applied to materials in a wide range of container sizes up to 50 L. It has been used routinely to assay items whose thermal power ranges from 0.001 W to 135 W.

1.2 This test method requires knowledge of the relative abundances of the plutonium isotopes and the 241Am/Pu mass ratio to determine the total plutonium mass.

1.3 This test method provides a direct measure of tritium content.

1.4 This test method provides a measure of 241Am either as a single isotope or mixed with plutonium.

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

ANSI N15.36

Measurement Control ProgramNondestructive Assay Measurement Control and Assurance

C1592-04

Standard Guide for Nondestructive Assay Measurements

C697-16

Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Plutonium Dioxide Powders and Pellets

C1673-10a(2018)

Standard Terminology of C26.10 Nondestructive Assay Methods (Includes all amendments and changes 5/1/2018).

C1009-21

Standard Guide for Establishing and Maintaining a Quality Assurance Program for Analytical Laboratories Within the Nuclear Industry

C1030-10(2018)

Standard Test Method for Determination of Plutonium Isotopic Composition by Gamma-Ray Spectrometry