Norm

ASTM C696 - 11 en

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

57,20 69,21 Incl BTW

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Status Definitief
Aantal pagina's 0
Gepubliceerd op 01-09-2011
Taal Engels

1.1 These test methods cover procedures for the chemical, mass spectrometric, and spectrochemical analysis of nuclear-grade uranium dioxide powders and pellets to determine compliance with specifications.

1.2 The analytical procedures appear in the following order:

Sections
Uranium by Ferrous Sulfate Reduction in Phosphoric Acid and Dichromate Titration Method
C1267 Test Method for Uranium By Iron (II) Reduction In Phosphoric Acid Followed By Chromium (VI) Titration In The Presence of Vanadium
Uranium and Oxygen Uranium Atomic Ratio by the Ignition (Gravimetric) Impurity Correction Method
C1453 Standard Test Method for the Determination of Uranium by Ignition and Oxygen to Uranium Ratio (O/U) Atomic Ratio of Nuclear Grade Uranium Dioxide Powders and Pellets
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
Total Chlorine and Fluorine by Pyrohydrolysis Ion-Selective Electrode Method
C1502 Standard Test Method for the Determination of Total Chlorine and Fluorine in Uranium Dioxide and Gadolinium Oxide    
Moisture by the Coulometric, Electrolytic Moisture Analyzer Method7-14
Nitrogen by the Kjeldahl Method15-22
Isotopic Uranium Composition by Multiple-Filament Surface Ionization Mass Spectrometric Method
Spectrochemical Determination of Trace Elements in High-Purity Uranium Dioxide23-30
Silver, Spectrochemical Determination of, by Gallium OxideCarrier D-C Arc Technique31 and 32
Rare Earths by Copper Spark-Spectrochemical Method
Impurity Elements by a Spark-Source Mass Spectrographic Method
C761 Test Method for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium Hexafluoride
C1287 Test Method for Determination of Impurities In Uranium Dioxide By Inductively Coupled Plasma Mass Spectrometry
Surface Area by Nitrogen Absorption Method33-39
Total Gas in Reactor-Grade Uranium Dioxide Pellets
Thorium and Rare Earth Elements by Spectroscopy
Hydrogen by Inert Gas Fusion
C1457 Standard Test Method for Determination of Total Hydrogen Content of Uranium Oxide Powders and Pellets by     Carrier Gas Extraction    
Uranium Isotopic Analysis by Mass Spectrometry
C1413 Test Method for Isotopic Analysis of Hydrolysed Uranium Hexafluoride and Uranyl Nitrate Solutions By Thermal Ionization Mass Spectrometry

7.1 This test method covers the determination of moisture in uranium dioxide samples. Detection limits are as low as 10 μg.

15.1 This test method covers the determination of nitride nitrogen in uranium dioxide in the range from 10 to 250 μg.

23.1 This test method covers the spectrographic analysis of nuclear-grade UO2 for the 26 elements in the ranges indicated in Table 1.

23.2 For simultaneous determination of trace elements by plasma emission spectroscopy refer to Test Method C761.

TABLE 1 Recommended Analytical Spectral Lines and Concentration Range of Trace Elements

ElementAnalytical Line,
°AA
Concentration range, μg/g of U
AgB 3280.68 0.1 to 50
Al 2367.06 10 to 200
As 2349.84 5 to 50
B 2497.73 0.10 to 5
Ba 4554.04 10 to 300
Be 2348.61 0.1 to 3
Bi 3067.72 5 to 50
Ca 4226.73 1 to 50
Cd 2288.02 0.15 to 5
Co 3453.51 5 to 50
Cr 2843.25 10 to 100
Cu 3247.54 1 to 10
Fe 2462.64 10 to 300
In 3256.09 5 to 50
Mg 2779.83 10 to 100
Mn 2605.69 5 to 50
Mo 3132.59 0.5 to 10
Na 3302.32 80 to 400
Ni 3050.82 5 to 100
P 2553.28 50 to 500
Pb 2833.07 5 to 50
Sb 2598.05 1 to 50
Si 2435.16 10 to 200
Sn 3175.02 5 to 50
Ti 3361.26 1 to 100
V 3183.41 1 to 100
Zn 3345.02 20 to 300
Zr 3438.23 25 to 300

A All of the above lines are photographed in the second order, except barium and calcium which are first order lines.

B A gallium oxide carrier must be used for silver. See Test Method E402.

31.1 This test method covers the spectrochemical determination of silver in nuclear-grade uranium dioxide. The relative standard deviation is 15 % for the concentration range of 0.1 to 50 μg/g.

33.1 This procedure is designed for a rapid determination of surface area of nuclear-grade uranium dioxide (UO2) powders. The determination of surface area by this procedure is automatic, simple, and fast enough to be used in quality control work. The range of analysis is from 1 to 1500 m2/g.

Details

ICS-code 27.120.30
Engelse titel Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Uranium Dioxide Powders and Pellets

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