ASTM C1413-05
(Test Method)Standard Test Method for Isotopic Analysis of Hydrolyzed Uranium Hexafluoride and Uranyl Nitrate Solutions by Thermal Ionization Mass Spectrometry
Standard Test Method for Isotopic Analysis of Hydrolyzed Uranium Hexafluoride and Uranyl Nitrate Solutions by Thermal Ionization Mass Spectrometry
SIGNIFICANCE AND USE
Uranium hexafluoride used to produce nuclear fuel must meet certain criteria for its isotopic composition as described in Specifications C 787 and C 996.
SCOPE
1.1 This method applies to the determinations of isotopic composition in hydrolyzed nuclear grade uranium hexafluoride. It covers isotopic abundance of 235U between 0.1 and 5.0% mass fraction, abundance of 234U between 0.0055 and 0.05% mass fraction, and abundance of 236U between 0.0003 and 0.5% mass fraction. This test method may be applicable to other isotopic abundance providing that corresponding standards are available.
1.2 This test method can apply to uranyl nitrate solutions. This can be achieved either by transforming the uranyl nitrate solution to a uranyl fluoride solution prior to the deposition on the filaments or directly by depositing the uranyl nitrate solution on the filaments. In the latter case, a calibration with uranyl nitrate standards must be performed.
1.3 This test method can also apply to other nuclear grade matrices (for example, uranium oxides) by providing a chemical transformation to uranyl fluoride or uranyl nitrate solution.
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.
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Standards Content (Sample)
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Designation: C1413 – 05
Standard Test Method for
Isotopic Analysis of Hydrolyzed Uranium Hexafluoride and
Uranyl Nitrate Solutions by Thermal Ionization Mass
1
Spectrometry
This standard is issued under the fixed designation C1413; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope oxide Powders and Pellets
C753 Specification for Nuclear-Grade, Sinterable Uranium
1.1 This method applies to the determination of isotopic
Dioxide Powder
composition in hydrolyzed nuclear grade uranium hexafluo-
235
C761 Test Methods for Chemical, Mass Spectrometric,
ride. It covers isotopic abundance of U between 0.1 and
234
Spectrochemical, Nuclear, and Radiochemical Analysis of
5.0 % mass fraction, abundance of U between 0.0055 and
236
Uranium Hexafluoride
0.05 % mass fraction, and abundance of U between 0.0003
C776 Specification for Sintered Uranium Dioxide Pellets
and 0.5 % mass fraction.This test method may be applicable to
C787 Specification for Uranium Hexafluoride for Enrich-
other isotopic abundance providing that corresponding stan-
ment
dards are available.
C788 Specification for Nuclear-Grade Uranyl Nitrate Solu-
1.2 This test method can apply to uranyl nitrate solutions.
tion or Crystals
This can be achieved either by transforming the uranyl nitrate
C996 Specification for Uranium Hexafluoride Enriched to
solution to a uranyl fluoride solution prior to the deposition on
235
Less Than 5 % U
the filaments or directly by depositing the uranyl nitrate
235
C1334 Specification for Uranium Oxides with a U Con-
solution on the filaments. In the latter case, a calibration with
tent of Less Than 5 % for Dissolution Prior to Conversion
uranyl nitrate standards must be performed.
to Nuclear-Grade Uranium Dioxide
1.3 This test method can also apply to other nuclear grade
,
C1346 Practice for Dissolution of UF from P-10 Tubes
6
matrices (for example, uranium oxides) by providing a chemi-
C1347 Practice for Preparation and Dissolution of Uranium
cal transformation to uranyl fluoride or uranyl nitrate solution.
Materials for Analysis
1.4 This standard does not purport to address all of the
235
C1348 Specification for Blended Uranium Oxides with U
safety concerns, if any, associated with its use. It is the
Content of Less Than 5 % for Direct Hydrogen Reduction
responsibility of the user of this standard to establish appro-
to Nuclear Grade Uranium Dioxide
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Summary of Test Method
2. Referenced Documents 3.1 After dilution of uranyl fluoride or uranyl nitrate solu-
2 tion, approximatively 2 µg of uranium are deposited on a
2.1 ASTM Standards:
rheniumfilament.Analysisisperformedinathermalionization
C696 Test Methods for Chemical, Mass Spectrometric, and
mass spectrometer (TIMS), uranium is vaporized and ionized
Spectrochemical Analysis of Nuclear-Grade Uranium Di-
through electrons emitted by a second filament; ions are
extractedbyanelectricfield,separatedbyamagneticfield,and
1
This test method is under the jurisdiction ofASTM Committee C26 on Nuclear
collected by four collectors on mass 234, 235, 236, 238. The
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
collectors are either faraday cups or electron multipliers
Test.
collectors (ion counting).
Current edition approved June 1, 2005. Published June 2005. Originally
approved in 1999. Last previous edition approved in 1999 as C1413 – 99. DOI:
3.2 Evaporation sequence and ion counting time are ad-
10.1520/C1413-05.
justed with the analysis of standard solutions of certified
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
isotopic content. Nitrate and fluoride solutions lead to two
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on different calibrations.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C1413 – 05
4. Significance and Use facturer’s recommendations (typically thickness is 0.04 mm
and width is 0.70 mm). Some equipment may accept tungsten
4.1 Uranium hexafluoride used to produce nuclear fuel must
filaments.
meetcertaincriteriaforitsisotopiccompositionasdescribedin
7.4 Isotopic Uranium Standards
Specifications C787 and C996.
236 235
7.4.1 UF of certified U, U isotopic composition,
6
5
such as COG 006, 008, 009, 010, 013, 014, 015.
5. Interferences
7.4.2 U O of certified isotop
...
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