ASTM C799-12

Standard Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Nuclear-Grade Uranyl Nitrate Solutions

STANDARD published on 1.1.2012

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The information about the standard:

Designation standards: ASTM C799-12
Note: WITHDRAWN
Publication date standards: 1.1.2012
SKU: NS-15107
The number of pages: 14
Approximate weight : 42 g (0.09 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Fissile materials

Annotation of standard text ASTM C799-12 :

Keywords:
impurity content, isotopic composition, stoichiometry, uranium content, uranyl nitrate , Uranium-232 content, Uranium content, Uranyl nitrate solutions, Vanadium content, Volatile matter content--nuclear materials, Alpha (total) activity, Boron content--nuclear-grade materials, Bromine content, Carbon content--nuclear materials, Columbium content, Fission by-products, Free acid content, Impurities--nuclear materials, Mass spectrometry--nuclear materials/applications, Oxalatge complexation

Additional information

Significance and Use

Uranyl nitrate solution is used as a feed material for conversion to the hexafluoride as well as for direct conversion to the oxide. In order to be suitable for this purpose, the material must meet certain criteria for uranium content, isotopic composition, acidity, radioactivity, and impurity content. These methods are designed to show whether a given material meets the specifications for these items described in Specification C788.

An assay is performed to determine whether the material has the specified uranium content.

Determination of the isotopic content of the uranium is made to establish whether the effective fissile content is in accordance with the purchaser’s specifications.

Acidity, organic content, and alpha, beta, and gamma activity are measured to establish that they do not exceed their maximum limits.

Impurity content is determined to ensure that the maximum concentration limit of certain impurity elements is not exceeded. Impurity concentrations are also required for calculation of the equivalent boron content (EBC), and the total equivalent boron content (TEBC).

1. Scope

1.1 These test methods cover procedures for the chemical, mass spectrometric, spectrochemical, nuclear, and radiochemical analysis of nuclear-grade uranyl nitrate solution to determine compliance with specifications.

1.2 The analytical procedures appear in the following order:

	Sections
Determination of Uranium	7
Specific Gravity by Pycnometry	15-20
Free Acid by Oxalate Complexation	21-27
Determination of Thorium	28
Determination of Chromium	29
Determination of Molybdenum	30
Halogens Separation by Steam Distillation	31-35
Fluoride by Specific Ion Electrode	36-42
Halogen Distillate Analysis: Chloride, Bromide, and Iodide by Amperometric Microtitrimetry	43
Determination of Chloride and Bromide	44
Determination of Sulfur by X-Ray Fluorescence	45
Sulfate Sulfur by (Photometric) Turbidimetry	46
Phosphorus by the Molybdenum Blue (Photometric) Method	54-61
Silicon by the Molybdenum Blue (Photometric) Method	62-69
Carbon by Persulfate Oxidation-Acid Titrimetry	70
Conversion to U₃O₈	71-74
Boron by Emission Spectrography	75-81
Impurity Elements by Spark Source Mass Spectrography	82
Isotopic Composition by Thermal Ionization Mass Spectrometry	83
Uranium-232 by Alpha Spectrometry	84-90
Total Alpha Activity by Direct Alpha Counting	91-97
Fission Product Activity by Beta Counting	98-104
Entrained Organic Matter by Infrared Spectrophotometry	105
Fission Product Activity by Gamma Counting	106
Determination of Arsenic	107
Determination of Impurities for the EBC Calculation	108
Determination of Technetium 99	109
Determination of Plutonium and Neptunium	110

1.3 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. Specific precautionary statements are given in Section 5.

2. Referenced Documents

C1267-17(2022)	Standard Test Method for Uranium by Iron (II) Reduction in Phosphoric Acid Followed by Chromium (VI) Titration in the Presence of Vanadium
C1287-18	Standard Test Method for Determination of Impurities in Nuclear Grade Uranium Compounds by Inductively Coupled Plasma Mass Spectrometry
C1295-24	Standard Test Method for Gamma Energy Emission from Fission and Decay Products in Uranium Hexafluoride and Uranyl Nitrate Solution
C1296-95(2001)	Standard Test Method for Determination of Sulfur in Uranium Oxides and Uranyl Nitrate Solutions by X-Ray Fluorescence (XRF)
C1380-04	Standard Test Method for Determination of Uranium Content and Isotopic Composition by Isotope Dilution Mass Spectrometry
C1413-18	Standard Test Method for Isotopic Analysis of Hydrolyzed Uranium Hexafluoride and Uranyl Nitrate Solutions by Thermal Ionization Mass Spectrometry
C1561-10(2016)	Standard Guide for Determination of Plutonium and Neptunium in Uranium Hexafluoride and U-Rich Matrix by Alpha Spectrometry
C1233-15(2021)	Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
C696-19	Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Uranium Dioxide Powders and Pellets
C1254-18	Standard Test Method for Determination of Uranium in Mineral Acids by X-Ray Fluorescence
C1219-05	Standard Test Methods for Arsenic in Uranium Hexafluoride
C788-03(2021)	Standard Specification for Nuclear-Grade Uranyl Nitrate Solution or Crystals
D1193-06(2018)	Standard Specification for Reagent Water
E12-70(1991)e01	Terminology Relating to Density and Specific Gravity of Solids, Liquids, and Gases (Withdrawn 1996)
E60-11(2022)e1	Standard Practice for Analysis of Metals, Ores, and Related Materials by Spectrophotometry (Includes all amendments and changes 6/29/2022).
Reagent	Chemicals Reagent Chemicals, American Chemical Society Specifications, American Chemical Society, Washington, DC. For suggestions on the testing of reagents not listed by the American Chemical Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville, MD.
C761-18	Standard Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium Hexafluoride
ISO 7097	Determination of Uranium in Uranium Product Solutions and Solids with Cerium IV Oxidation Titrimetric Method Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

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