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ASTM C697-16
Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Plutonium Dioxide Powders and Pellets
25 стр.
Действует
Печатное изданиеЭлектронный (pdf)
107.64 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
27.120.30 Fissile. Including raw materials / Делящиеся ядерные вещества. Включая сырье
Сборник (ASTM):
12.01 Nuclear Energy (I) / Ядерная энергия (I)
Тематика:
Nuclear Technology
Описание
Значение и использование

4.1 Plutonium dioxide is used in mixtures with uranium dioxide as a nuclear-reactor fuel. In order to be suitable for this purpose, the material must meet certain criteria for plutonium content, isotopic composition, and impurity content. These test methods are designed to show whether or not a given material meets the specifications for these items as described in Specification C757.

4.1.1 An assay is performed to determine whether the material has the minimum plutonium content specified on a dry weight basis.

4.1.2 Determination of the isotopic content of the plutonium in the plutonium dioxide powder is made to establish whether the effective fissile content is in compliance with the purchaser's specifications.

4.1.3 Impurity content is determined to ensure that the maximum concentration limit of certain impurity elements is not exceeded. Determination of impurities is also required for calculation of the equivalent boron content (EBC) as described in Practice C1233.

4.2 Fitness for Purpose of Safeguards and Nuclear Safety Applications—Methods intended for use in safeguards and nuclear safety applications shall meet the requirements specified by Guide C1068 for use in such applications.

Область применения

1.1These test methods cover procedures for the chemical, massspectrometric, and spectrochemical analysis of nuclear-gradeplutonium dioxide powders and pellets to determine compliance withspecifications.

1.2 Theanalytical procedures appear in the following order:

Sections

PlutoniumSample Handling

  8 to 10

Plutonium byControlled-Potential Coulometry

2

Plutonium byCeric Sulfate Titration

3

Plutonium byAmperometric Titration with Iron(II)

2

Plutonium byDiode Array Spectrophotometry

3

Nitrogen byDistillation Spectrophotometry Using Nessler
 Reagent

 11 to 18

Carbon(Total) by Direct Combustion–Thermal Conductivity

 19 to 29

TotalChlorine and Fluorine by Pyrohydrolysis

 30 to 37

Sulfur byDistillation Spectrophotometry

 38 to 46

PlutoniumIsotopic Analysis by Mass Spectrometry

4

Rare EarthElements by Spectroscopy

 47 to 54

TraceElements by Carrier–Distillation Spectroscopy

 55 to 62

(Alternative:Impurities by ICP-AES or ICP-MS)

ImpurityElements by Spark-Source Mass Spectrography

63 to 69

Moisture bythe Coulometric Electrolytic Moisture Analyzer

70 to 77

Total Gas inReactor-Grade Plutonium Dioxide Pellets

5

Plutonium-238Isotopic Abundance by Alpha Spectrometry

3

Americium-241in Plutonium by Gamma-Ray Spectrometry

2

Rare EarthsBy Copper Spark-Spectroscopy

78 to 87

PlutoniumIsotopic Analysis by Mass Spectrometry

88 to 96

Oxygen-To-Metal Atom Ratio by Gravimetry

97 to 104

1.3 Thevalues stated in SI units are to be regarded as standard. Thevalues given in parentheses are for information only.

1.4This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use. For specific precautionary statements, seeSections 6, 16.2.5, 44.7, 51.9 and 92.5.1.

Ключевые слова:
impurity content; isotopic composition; plutonium content; plutonium dioxide pellets; plutonium dioxide powders;;