ASTM-E692 2008

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E692-08 Standard Test Method for Determining the Content of Cesium-137 in Irradiated Nuclear Fuels by High-Resolution Gamma-Ray Spectral Analysis

Published By	Publication Date	Number of Pages
ASTM	2008	4

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Categories: 27.120.30 - Fissile materials and nuclear fuel technology, ASTM

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Description

ASTM E692-08

Withdrawn Standard: Standard Test Method for Determining the Content of Cesium-137 in Irradiated Nuclear Fuels by High-Resolution Gamma-Ray Spectral Analysis (Withdrawn 2013)

ASTM E692

Scope

1.1 This test method covers the determination of the number of atoms of ¹³⁷Cs in aqueous solutions of irradiated uranium and plutonium nuclear fuel. When combined with a method for determining the initial number of fissile atoms in the fuel, the results of this analysis allows atom percent fission (burn-up) to be calculated (1). The determination of atom percent fission, uranium and plutonium concentrations, and isotopic abundances are covered in Test Methods E 267 and E 321.

1.2 ¹³⁷Cs is not suitable as a fission monitor for samples that may have lost cesium during reactor operation. For example, a large temperature gradient enhances ¹³⁷Cs migration from the fuel region to cooler regions such as the radial fuel-clad gap, or, to a lesser extent, towards the axial fuel end.

1.3 A nonuniform ¹³⁷Cs distribution should alert the analyst to the potential loss of the fission product nuclide. The ¹³⁷Cs distribution may be ascertained by an axial gamma-ray scan of the fuel element to be assayed. In a mixed-oxide fuel, comparison of the ¹³⁷Cs distribution with the distribution of nonmigrating fission-product nuclides such as ⁹⁵Zr or ¹⁴⁴Ce would indicate the relative degree of ¹³⁷Cs migration.

1.4 The values stated in SI units are to be regarded as standard. No other unites of measurement are included in this standard.

1.5 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.

Keywords

Cesium-137; gamma-ray spectrometer; nuclear fuel; percent fission; Cesium-137; Gamma radiation–nuclear materials/applications; High-resolution gamma-ray spectral analysis; Nuclear fuels (reactor); Plutonium; Uranium

ICS Code

ICS Number Code 27.120.30 (Fissile materials and nuclear fuel technology)

DOI: 10.1520/E0692-08

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Summary of Test Method Significance and Use
2	Precautions Apparatus Reagents and Materials FIG. 1
3	Procedure Precision and Bias Keywords
4	REFERENCES

Additional information

Standard Title	E692-08 Standard Test Method for Determining the Content of Cesium-137 in Irradiated Nuclear Fuels by High-Resolution Gamma-Ray Spectral Analysis
Published Code	ASTM
Publication Date	2008
Pages Count	4
ICS Codes	27.120.30 - Fissile materials and nuclear fuel technology