ASTM C1429-21
(Test Method)Standard Test Method for Isotopic Analysis of Uranium Hexafluoride by Double-Standard Multi-Collector Gas Mass Spectrometer
Standard Test Method for Isotopic Analysis of Uranium Hexafluoride by Double-Standard Multi-Collector Gas Mass Spectrometer
SIGNIFICANCE AND USE
5.1 Uranium hexafluoride used to produce nuclear-reactor fuel must meet certain criteria for its isotopic composition. This test method may be used to help determine if sample materials meet the criteria described in Specifications C787 and C996.
SCOPE
1.1 This test method covers a quantitative test method applicable to determining the mass percent of uranium isotopes in uranium hexafluoride (UF6) samples. This method as described is for concentrations of 235U between 0.1 and 10 mass %, and 234U and 236U between 0.0001 and 0.1 mass %.
1.2 This test method is for laboratory analysis by a gas mass spectrometer with a multi-collector.
1.3 This standard complements Test Methods C761, the double-standard method for gas mass spectrometers using a single collector, by providing a method for spectrometers using a multi-collector.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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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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:C1429 −21
Standard Test Method for
Isotopic Analysis of Uranium Hexafluoride by Double-
1
Standard Multi-Collector Gas Mass Spectrometer
This standard is issued under the fixed designation C1429; 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* C859Terminology Relating to Nuclear Materials
C996Specification for Uranium Hexafluoride Enriched to
1.1 This test method covers a quantitative test method
235
Less Than 5% U
applicabletodeterminingthemasspercentofuraniumisotopes
C1215Guide for Preparing and Interpreting Precision and
in uranium hexafluoride (UF ) samples. This method as de-
6
235 Bias Statements in Test Method Standards Used in the
scribed is for concentrations of U between 0.1 and
234 236 Nuclear Industry
10mass%, and U and U between 0.0001 and 0.1
2.2 Other Documents:
mass%.
USEC 651Good Handling Practices for Uranium Hexafluo-
1.2 Thistestmethodisforlaboratoryanalysisbyagasmass 3
ride
spectrometer with a multi-collector.
3. Terminology
1.3 This standard complements Test Methods C761, the
double-standard method for gas mass spectrometers using a 3.1 Definitions:
singlecollector,byprovidingamethodforspectrometersusing
3.1.1 Except as otherwise defined herein, definitions of
a multi-collector. terms are as given in Terminology C859.
3.2 Definitions of Terms Specific to This Standard:
1.4 This standard does not purport to address all of the
3.2.1 A standard, n—the low-value standard of a standard
safety concerns, if any, associated with its use. It is the
pair that brackets the sample.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- 3.2.2 B standard, n—the high-value standard of a standard
mine the applicability of regulatory limitations prior to use.
pair that brackets the sample.
1.5 This international standard was developed in accor-
3.2.3 determination, n—a single isotopic value, calculated
dance with internationally recognized principles on standard-
from a sequence of ratios; the most basic isotopic value
ization established in the Decision on Principles for the
calculated.
Development of International Standards, Guides and Recom-
3.2.4 Lagrange’s interpolation formula, n—a mathematical
mendations issued by the World Trade Organization Technical
equation designed to estimate values between two or more
Barriers to Trade (TBT) Committee.
known values.
2. Referenced Documents
3.2.5 run, n—a completed, six-entry symmetrical sequence
2
consisting of A standard, sample, B standard, B standard,
2.1 ASTM Standards:
sample, and A standard from which a determination can be
C761Test Methods for Chemical, Mass Spectrometric,
calculated for one or more isotopes.
Spectrochemical,Nuclear,andRadiochemicalAnalysisof
Uranium Hexafluoride 3.2.6 standard spread, n—the difference between the high
C787Specification for Uranium Hexafluoride for Enrich- and low standards; sometimes called standard range.
ment
3.2.7 test result, n—a reported value; the mean of two or
more determinations.
1
This test method is under the jurisdiction ofASTM CommitteeC26 on Nuclear
4. Summary of Test Method
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
Test.
4.1 Uranium hexafluoride gas is introduced into an ioniza-
Current edition approved Oct. 1, 2021. Published November 2021. Originally
tion source. The resulting ions are accelerated down the flight
approved in 1999. Last previous edition approved in 2014 as C1429–99 (2014).
tube into the magnetic field. The magnetic field separates the
DOI: 10.1520/C1429-21.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from Centrus Energy Corp., 6901 Rockledge Drive, Suite 800
the ASTM website. Bethesda, Maryland 20817, https://www.centrusenergy.com.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1429−21
ions into ion beams in accordance with the m/e ratio. Four to avoid breathing fumes. Use appropriate personal protective
234 + 235 + 236 +
collectors are stationed so the UF , UF , UF , equipment such as gloves, eye, and face protection.
5 5 5
...
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: C1429 − 99 (Reapproved 2014) C1429 − 21
Standard Test Method for
Isotopic Analysis of Uranium Hexafluoride by Double-
1
Standard Multi-Collector Gas Mass Spectrometer
This standard is issued under the fixed designation C1429; 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 Scope*
1.1 This test method covers a quantitative test method applicable to determining the mass percent of uranium isotopes in uranium
235
hexafluoride (UF ) samples. This method as described is for concentrations of U between 0.1 and 10 mass %, 10 mass %, and
6
234 236
U and U between 0.0001 and 0.1 mass %.
1.2 This test method is for laboratory analysis by a gas mass spectrometer with a multi-collector.
1.3 This standard complements Test Methods C761, the double-standard method for gas mass spectrometers using a single
collector, by providing a method for spectrometers using a multi-collector.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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:
C761 Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium
Hexafluoride
C787 Specification for Uranium Hexafluoride for Enrichment
C859 Terminology Relating to Nuclear Materials
235
C996 Specification for Uranium Hexafluoride Enriched to Less Than 5 % U
C1215 Guide for Preparing and Interpreting Precision and Bias Statements in Test Method Standards Used in the Nuclear
Industry
2.2 Other Documents:
3
USEC 651 Good Handling Practices for Uranium Hexafluoride
3. Terminology
3.1 Definitions:
1
This test method is under the jurisdiction of ASTM CommitteeC26 on Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of Test.
Current edition approved June 1, 2014Oct. 1, 2021. Published June 2014November 2021. Originally approved in 1999. Last previous edition approved in 20092014 as
ε1
C1429 – 99 (2009)(2014). . DOI: 10.1520/C1429-99R14.10.1520/C1429-21.
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
Available from Centrus Energy Corp., 6901 Rockledge Drive, Suite 800 Bethesda, Maryland 20817, https://www.centrusenergy.com.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1429 − 21
3.1.1 Except as otherwise defined herein, definitions of terms are as given in Terminology C859.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 A standard, n—the low-value standard of a standard pair that brackets the sample.
3.2.2 B standard, n—the high-value standard of a standard pair that brackets the sample.
3.2.3 determination, n—a single isotopic value, calculated from a sequence of ratios; the most basic isotopic value calculated.
3.2.4 Lagrange’s interpolation formula, n—a mathematical equation designed to estimate values between two or more known
values.
3.2.5 run, n—a completed, six-entry symmetrical sequence consisting of A standard, sample, B standard, B standard, sample, and
A standard from which a determination can be calculated for one or more isotopes.
3.2.6 standard spread, n—the difference between the high and low standards; sometimes called standard range.
3.2.7 test result, n—a reported value; the mean of two or more determinations.
4. Summary of Test Method
4.1 Uranium hexafluoride gas is introduced into an ionization source. The resulting ions are accelerated down the flight tube into
the magnetic field. The m
...
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