ASTM C 698 : 2010
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Mixed Oxides ((U, Pu)O2)
Hardcopy , PDF
11-11-2014
English
01-06-2010
Important note : All end users must be registered with an Account prior to user licenses being assigned.| Committee |
C 26
|
| DocumentType |
Test Method
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| Pages |
29
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| PublisherName |
American Society for Testing and Materials
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| Status |
Superseded
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| SupersededBy | |
| Supersedes |
1.1 These test methods cover procedures for the chemical, mass spectrometric, and spectrochemical analysis of nuclear-grade mixed oxides, (U, Pu)O2, powders and pellets to determine compliance with specifications.
1.2 The analytical procedures appear in the following order:
| Sections | |
| Uranium in the Presence of Pu by Potentiometric Titration | |
| Plutonium by Controlled-Potential Coulometry | |
| Plutonium by Amperometric Titration with Iron (II) | |
| Nitrogen by Distillation Spectrophotometry Using Nessler Reagent | 7 to 14 |
| Carbon (Total) by Direct Combustion-Thermal Conductivity | 15 to 26 |
| Total Chlorine and Fluorine by Pyrohydrolysis | 27 to 34 |
| Sulfur by Distillation-Spectrophotometry | 35 to 43 |
| Moisture by the Coulometric, Electrolytic Moisture Analyzer | 44 to 51 |
| Isotopic Composition by Mass Spectrometry | |
| Rare Earths by Copper Spark Spectroscopy | 52 to 59 |
| Trace Impurities by Carrier Distillation Spectroscopy | 60 to 69 |
| Impurities by Spark-Source Mass Spectrography | 70 to 76 |
| Total Gas in Reactor-Grade Mixed Dioxide Pellets | 77 to 84 |
| Tungsten by Dithiol-Spectrophotometry | 85 to 93 |
| Rare Earth Elements by Spectroscopy | 94 to 97 |
| Plutonium-238 Isotopic Abundance by Alpha Spectrometry | |
| Americium-241 in Plutonium by Gamma-Ray Spectrometry | |
| Uranium and Plutonium Isotopic Analysis by Mass Spectrometry | 98 to 106 |
| Oxygen-to-Metal Atom Ratio by Gravimetry | 107 to 115 |
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
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. (For specific safeguard and safety precaution statements, see Sections 11, 20, 64, and 112 and 102.6.1.) 7.1 This test method covers the determination of 5 to 100 μg/g of nitride nitrogen in mixtures of plutonium and uranium oxides in either pellet or powder form. 15.1 This test method covers the determination of 10 to 200 μg of residual carbon in nuclear grade mixed oxides, (U,Pu)O2. 27.1 This test method is applicable to the determination of 5 to 100μ g/g of chlorine and 1 to 100 μg/g of fluorine in 1-g samples of nuclear-grade mixed oxides, (U, Pu)O2. 35.1 This test method covers the determination of sulfur in the concentration range from 10 to 600 μg/g for samples of nuclear-grade uranium and plutonium mixed oxides, (U, Pu)O2. 44.1 This test method covers the determination of moisture in nuclear-grade mixed oxides of uranium and plutonium (U,Pu)O2. Detection limits are as low as 10 μg. 52.1 This test method covers the determination of rare earths in uranium-plutonium dioxide over the range from 10 to 200 μg/g. 60.1 This test method covers the analysis of uranium-plutonium dioxide [(U, Pu)O2] for the 25 elements in the ranges indicated in Table 1, using gallium oxides or sodium fluoride as the carrier. (See also Table 2.) 70.1 This test method covers the spark source spectrographic analysis of uranium and plutonium dioxide for impurity elements. Because of its extreme sensitivity, it may be the most practical test method for the determination of certain impurities whose concentration is below the detectable limits of other spectrographic methods. 77.1 This test method covers the measurement of volatiles other than water in reactor-grade mixed dioxide pellets. The lower limit of the test method using the described equipment and a sample of approximately 1 g is 0.01 cm3 per gram of sample at STP conditions (23). 85.1 This test method covers the determination of 5 to 150 μg of tungsten in 1-g samples of nuclear-grade uranium and plutonium mixed oxides (U, Pu)O2 (24). 94.1 This test method covers the determination of dysprosium, europium, gadolinium, and samarium in mixed oxides of uranium and plutonium over the concentration range from 0.1 to 10 μg/g of mixed oxide. 98.1 This test method covers the determination of the isotopic composition of uranium and plutonium in nuclear-grade mixed oxides ((U, Pu)O2). 107.1 This test method covers the determination of the oxygen-to-metal atom ratio (O/M) in sintered mixed oxide pellets and powders.
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