ASTM-C968 2006

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C968-06 Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets

Published By	Publication Date	Number of Pages
ASTM	2006	5

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

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Description

1.1 These test methods cover procedures for the analysis of sintered gadolinium oxide-uranium dioxide pellets to determine compliance with specifications.

1.2 The analytical procedures appear in the following order:

1.3 The values stated in SI units are to be regarded as the standard.

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.

6.1 This test method describes the determination of nitrogen in gadolinium oxide-uranium dioxide pellets (Gd ₂ O ₃ /UO ₂ ). With a 2 to 5-g sample, concentrations from 5 to 100 ? g of nitrogen are determined without interference.

17.1 The homogeneity of Gd ₂ O ₃ in UO ₂ has been cited in Specification C922 as an important requirement for this fuel form. The uniform distribution of gadolinia in urania will result in up to three components in the pellet: free Gd ₂ O ₃ , free UO ₂ , and a Gd ₂ O ₃ -UO ₂ solid solution. There are a number of ways for assessing uniformity of which the ceramographic method described here may not be the most definitive. This technique has been used over the gadolinia concentration range from 1 to 10 weight %.

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PDF Pages	PDF Title
1	Scope Referenced Documents
2	Significance and Use Reagents Safety Precautions Scope Summary of Test Method
3	Interferences Apparatus Reagents and Materials Precautions Purity of Water Preparation of Calibration Curve FIG. 1
4	Procedure Calculation Precision and Bias Scope Summary of Test Method Apparatus Reagents and Materials
5	Sample Preparation Sample Analysis Evaluation Precision and Bias REFERENCES

Additional information

C1430 Test Method for Determination of Uranium, Oxygen to Uranium, and Oxygen to Metal (O/M) in Sintered Uranium Dioxide and Gadolinia-Uranium Dioxide Pellets by Atmospheric Equilibration
Total Gas by Hot Vacuum Extraction
Hydrogen by Inert Gas Fusion
C1413 Test Method for Isotopic Analysis of Hydrolysed Uranium Hexafluoride And Uranyl Nitrate Solutions By Thermal Ionization Mass Spectrometry
Oxygen-to-Metal Ratio of Sintered Gadolinium Oxide-Uranium Dioxide Pellets
Gadolinia Content by Energy-Dispersive X-Ray Spectrometry
C1408 Test Method for Carbon (Total) in Uranium Oxide Powders and Pellets By Direct Combustion-Infrared Detection Method
C1347 Practice for Preparation and Dissolution of Uranium Materials for Analysis
Isotopic Uranium Composition by Multiple-Filament Surface-Ionization Mass Spectrometric Method
Chlorine and Fluorine by Pyrohydrolysis Ion-Selective Electrode Method
C1502 Test Method for Determination of Total Chlorine and Fluorine in Uranium Dioxide and Gadolinium Oxide
Spectrochemical Determination of Trace Impurity Elements
Ceramographic Determination of Free Gd 2 O 3 and Free UO 2 to Estimate the Homogeneity of (U,Gd)O 2 Pellets	17 to 24
Nitrogen by Distillation Nessler Reagent (Photometric) Method	6 to 16
C1457 Test Method for Determination of Total Hydrogen Content of Uranium Oxide Powders and Pellets by Carrier Gas Extraction
C1517 Test Method for Determination of Metallic Impurities in Uranium Metal or Compounds by DC-Arc Emission Spectroscopy
C1456 Test Method for Determination of Uranium or Gadolinium, or Both, in Gadolinium Oxide-Uranium Oxide Pellets or by X-Ray Fluorescence (XRF)
Carbon (Total) by Direct Combustion Thermal Conductivity Method
ICS Codes	27.120.30 - Fissile materials and nuclear fuel technology

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ASTM-C968 2006

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