ASTM C1625-19
(Test Method)Standard Test Method for Uranium and Plutonium Concentrations and Isotopic Abundances by Thermal Ionization Mass Spectrometry
Standard Test Method for Uranium and Plutonium Concentrations and Isotopic Abundances by Thermal Ionization Mass Spectrometry
SIGNIFICANCE AND USE
5.1 Uranium and plutonium oxides can be used as a nuclear-reactor fuel in the form of pellets. In order to be suitable for use as a nuclear fuel the starting material must meet certain specifications, such as found in Specifications C757, C833, C753, C776, C1008, or as specified by the purchaser. The uranium concentration, plutonium concentration, or both, and the isotopic abundances are measured by mass spectrometry following this test method.
5.2 The separated heavy element fractions placed on mass spectrometric filaments must be very pure. The quantity required depends upon the sensitivity of the instrument detection system. If an electron multiplier detector is to be used, only a few nanograms are required. If a Faraday cup is used, a few micrograms are needed. Chemical purity of the sample becomes more important as the sample size decreases, because ion emission of the sample is suppressed by impurities.
SCOPE
1.1 This test method covers the determination of the concentration and isotopic composition of uranium and plutonium in solutions. The purified uranium or plutonium from samples ranging from nuclear materials to environmental or bioassay matrices is loaded onto a mass spectrometric filament. The isotopic ratio is determined by thermal ionization mass spectrometry, the concentration is determined by isotope dilution.
1.2 The values stated in SI units are to be regarded as the standard. Values in parentheses are for information only.
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 safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1625 − 19
Standard Test Method for
Uranium and Plutonium Concentrations and Isotopic
1
Abundances by Thermal Ionization Mass Spectrometry
This standard is issued under the fixed designation C1625; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope ide Pellets for Light Water Reactors
C859Terminology Relating to Nuclear Materials
1.1 This test method covers the determination of the con-
C1008 Specification for Sintered (Uranium-Plutonium)
centration and isotopic composition of uranium and plutonium
3
DioxidePellets—Fast Reactor Fuel (Withdrawn 2014)
in solutions. The purified uranium or plutonium from samples
C1068Guide for Qualification of Measurement Methods by
ranging from nuclear materials to environmental or bioassay
a Laboratory Within the Nuclear Industry
matrices is loaded onto a mass spectrometric filament. The
C1128Guide for Preparation of Working Reference Materi-
isotopic ratio is determined by thermal ionization mass
als for Use in Analysis of Nuclear Fuel Cycle Materials
spectrometry, the concentration is determined by isotope dilu-
C1156Guide for Establishing Calibration for a Measure-
tion.
ment Method Used toAnalyze Nuclear Fuel Cycle Mate-
1.2 The values stated in SI units are to be regarded as the
rials
standard. Values in parentheses are for information only.
C1168PracticeforPreparationandDissolutionofPlutonium
1.3 This standard does not purport to address all of the
Materials for Analysis
safety concerns, if any, associated with its use. It is the
C1347Practice for Preparation and Dissolution of Uranium
responsibility of the user of this standard to establish safety,
Materials for Analysis
health, and environmental practices and determine the appli-
C1411Practice for The Ion Exchange Separation of Ura-
cability of regulatory limitations prior to use.
nium and Plutonium Prior to Isotopic Analysis
1.4 This international standard was developed in accor-
238
C1415Test Method for Pu Isotopic Abundance By Alpha
dance with internationally recognized principles on standard-
Spectrometry
ization established in the Decision on Principles for the
D3084Practice for Alpha-Particle Spectrometry of Water
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
2.2 Other Documents
Barriers to Trade (TBT) Committee.
International Target Values 2010for Measurement Uncer-
4
tainties in Safeguarding Nuclear Materials
2. Referenced Documents
2
2.1 ASTM Standards: 3. Terminology
C753Specification for Nuclear-Grade, Sinterable Uranium
3.1 For definitions of pertinent terms not listed here, see
Dioxide Powder
Terminology C859.
C757Specification for Nuclear-Grade Plutonium Dioxide
Powder for Light Water Reactors 3.2 Definitions of Terms Specific to This Standard:
C776SpecificationforSinteredUraniumDioxidePelletsfor
3.2.1 isotope dilution mass spectrometry (IDMS)—
Light Water Reactors
determination of elemental concentration of a sample, by mass
C833Specification for Sintered (Uranium-Plutonium) Diox-
spectrometry, using the addition of a spike material to the
sample with significantly different isotopic composition from
the sample and accurately characterized mass of the major
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC26onNuclear
spike isotope.
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
Test.
Current edition approved Sept. 15, 2019. Published October 2019. Originally
approved in 2005. Last previous edition approved in 2012 as C1625–12. DOI:
3
10.1520/C1625-19. The last approved version of this historical standard is referenced on
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or www.astm.org.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM K. Zhao et. al., “International Target Values 2010 for Measurement Uncertain-
Standards volume information, refer to the standard’s Document Summary page on ties in Safeguarding Nuclear Materials,” International Atomic Energy Agency
the ASTM website. STR-368, 2010.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1625 − 19
4. Summary of Test Method 7.1.1 A thermal ionization source with single or multiple
filaments of rhenium, tungsten or tantalum.
4.1 The uranium and plutonium are separated from each
7.1.2 An analyzer radi
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1625 − 12 C1625 − 19
Standard Test Method for
Uranium and Plutonium Concentrations and Isotopic
1
Abundances by Thermal Ionization Mass Spectrometry
This standard is issued under the fixed designation C1625; 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
1.1 This test method covers the determination of the concentration and isotopic composition of uranium and plutonium in
solutions. The purified uranium or plutonium from samples ranging from nuclear materials to environmental or bioassay matrices
is loaded onto a mass spectrometric filament. The isotopic ratio is determined by thermal ionization mass spectrometry, the
concentration is determined by isotope dilution.
1.2 The values stated in SI units are to be regarded as the standard. Values in parentheses are for information only.
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 safety safety, health, and healthenvironmental practices and determine the applicability
of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C753 Specification for Nuclear-Grade, Sinterable Uranium Dioxide Powder
C757 Specification for Nuclear-Grade Plutonium Dioxide Powder for Light Water Reactors
C776 Specification for Sintered Uranium Dioxide Pellets for Light Water Reactors
C833 Specification for Sintered (Uranium-Plutonium) Dioxide Pellets for Light Water Reactors
C859 Terminology Relating to Nuclear Materials
3
C1008 Specification for Sintered (Uranium-Plutonium) DioxidePellets—Fast Reactor Fuel (Withdrawn 2014)
C1068 Guide for Qualification of Measurement Methods by a Laboratory Within the Nuclear Industry
C1128 Guide for Preparation of Working Reference Materials for Use in Analysis of Nuclear Fuel Cycle Materials
C1156 Guide for Establishing Calibration for a Measurement Method Used to Analyze Nuclear Fuel Cycle Materials
C1168 Practice for Preparation and Dissolution of Plutonium Materials for Analysis
C1347 Practice for Preparation and Dissolution of Uranium Materials for Analysis
C1411 Practice for The Ion Exchange Separation of Uranium and Plutonium Prior to Isotopic Analysis
238
C1415 Test Method for Pu Isotopic Abundance By Alpha Spectrometry
237 232 235 238
C1614 Practice for the Determination of Np, Th, U, and U in Urine by Inductively Coupled Plasma-Mass
3
Spectrometry (ICP-MS) and Gamma Ray Spectrometry (Withdrawn 2015)
D3084 Practice for Alpha-Particle Spectrometry of Water
2.2 Other Documents
4
International Target Values 2010 for Measurement Uncertainties in Safeguarding Nuclear Materials
1
This test method is under the jurisdiction of ASTM Committee C26 on Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of Test.
Current edition approved June 1, 2012Sept. 15, 2019. Published July 2012October 2019. Originally approved in 2005. Last previous edition approved in 20052012 as
C1625C1625 – 12.–05. DOI: 10.1520/C1625-12.10.1520/C1625-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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 the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
4
K. Zhao et. al., “International Target Values 2010 for Measurement Uncertainties in Safeguarding Nuclear Materials,” International Atomic Energy Agency STR-368,
2010.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1625 − 19
3. Terminology
3.1 For definitions of pertinent terms not listed here, see Terminology C859.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 isotope dilution mass spectrometry (IDMS)—isotope ratio measurements, using mass spectrometry, of samp
...
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