ASTM C968-06
Historical Standard: ASTM C968-06 Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets
SUPERSEDED (see Active link, below)
ASTM C968
1. Scope
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:
| Section | |
|---|---|
| Carbon (Total) by Direct Combustion Thermal Conductivity Method | |
| C1408 Test Method for Carbon (Total) in Uranium Oxide Powders and Pellets By Direct Combustion-Infrared Detection 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 | |
| Gadolinia Content by Energy-Dispersive X-Ray Spectrometry | |
| C1456 Test Method for Determination of Uranium or Gadolinium, or Both, in Gadolinium Oxide-Uranium Oxide Pellets or by X-Ray Fluorescence (XRF) | |
| Hydrogen by Inert Gas Fusion | |
| C1457 Test Method for Determination of Total Hydrogen Content of Uranium Oxide Powders and Pellets by Carrier Gas Extraction | |
| Isotopic Uranium Composition by Multiple-Filament Surface-Ionization Mass Spectrometric Method | |
| C1413 Test Method for Isotopic Analysis of Hydrolysed Uranium Hexafluoride And Uranyl Nitrate Solutions By Thermal Ionization Mass Spectrometry | |
| C1347 Practice for Preparation and Dissolution of Uranium Materials for Analysis | |
| Nitrogen by Distillation Nessler Reagent (Photometric) Method | 6 to 16 |
| Oxygen-to-Metal Ratio of Sintered Gadolinium Oxide-Uranium Dioxide Pellets | |
| 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 | |
| Spectrochemical Determination of Trace Impurity Elements | |
| C1517 Test Method for Determination of Metallic Impurities in Uranium Metal or Compounds by DC-Arc Emission Spectroscopy | |
| Total Gas by Hot Vacuum Extraction | |
| 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 |
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 %.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
C922 Specification for Sintered Gadolinium Oxide-Uranium Dioxide Pellets
C1347 Practice for Preparation and Dissolution of Uranium Materials for Analysis
C1408 Test Method for Carbon (Total) in Uranium Oxide Powders and Pellets By Direct Combustion-Infrared Detection Method
C1413 Test Method for Isotopic Analysis of Hydrolyzed Uranium Hexafluoride and Uranyl Nitrate Solutions by Thermal Ionization Mass Spectrometry
C1430 Test Method for Determination of Uranium, Oxygen to Uranium (O/U), and Oxygen to Metal (O/M) in Sintered Uranium Dioxide and Gadolinia-Uranium Dioxide Pellets by Atmospheric Equilibration
C1456 Test Method for Determination of Uranium or Gadolinium (or both) in Gadolinium Oxide-Uranium Oxide Pellets or by X-Ray Fluorescence (XRF)
C1457 Test Method for Determination of Total Hydrogen Content of Uranium Oxide Powders and Pellets by Carrier Gas Extraction
C1502 Test Method for Determination of Total Chlorine and Fluorine in Uranium Dioxide and Gadolinium Oxide
C1517 Test Method for Determination of Metallic Impurities in Uranium Metal or Compounds by DC-Arc Emission Spectroscopy
D1193 Specification for Reagent Water
E112 Test Methods for Determining Average Grain Size
E146
Keywords
0 Vacuum testing; Volatile matter content--nuclear materials; XRF (X-ray fluorescence)--nuclear materials; Atomic ratio; Carbon content--nuclear materials; Ceramographic determination; Chlorine content--nuclear materials/applications; Energy-dispersive x-ray analysis (EDXA); Fluorine content--nuclear materials/applications; Gadolinia; Gadolinium oxide-uranium dioxide powder/pellets; Gases--radioactive; Homogeneity; Hot-vacuum extraction; Hydrogen content--nuclear materials; Inert gas fusion; Ion selective electrode method; Isotopic analysis; Mass spectrometry--nuclear materials/applications; Multiple-filament surface-ionization mass spectrometric method; Nessler reagent method; Nitrogen content--nuclear materials; Oxygen-to-metal (O/M) ratio; Pyrohydrolysis ion-selective electrode method; Spectrographic analysis; Spectroscopy--emission; Thermal analysis (TA); Thorium content; Trace elements--spectrochemical analysis; Uranium; Uranium content; Uranium isotopic analysis
ICS Code
ICS Number Code 27.120.30 (Fissile materials and nuclear fuel technology)
DOI: 10.1520/C0968-06
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