ASTM C1344-97(2008)
(Test Method)Standard Test Method for Isotopic Analysis of Uranium Hexafluoride by Single-Standard Gas Source Mass Spectrometer Method
Standard Test Method for Isotopic Analysis of Uranium Hexafluoride by Single-Standard Gas Source Mass Spectrometer Method
SIGNIFICANCE AND USE
Uranium hexafluoride is a basic material used to prepare nuclear reactor fuel. To be suitable for this purpose, the material must meet the criteria for isotopic composition. This test method is designed to determine whether the material meets the requirements described in Specifications C 787 and C 996.
ASTM Committee C-26 Safeguards Statement:
The material (uranium hexafluoride) to which this test method applies is subject to the nuclear safeguards regulations governing its possession and use. The analytical procedure in this test method has been designated as technically acceptable for generating safeguards accountability data.
When used in conjunction with appropriate certified reference materials (CRMs), this procedure can demonstrate traceability to the national measurement base. However, adherence to this procedure does not automatically guarantee regulatory acceptance of the regulatory safeguards measurements. It remains the sole responsibility of the user of this test method to ensure that its application to safeguards has the approval of the proper regulatory authorities.
SCOPE
1.1 This test method covers the isotopic analysis of uranium hexafluoride (UF6) and may be used for the entire range of 235U isotopic compositions for which standards are available.
1.2 This test method is applicable to the determination of the isotopic relationship between two UF6 samples. If the abundance of a specific isotope of one sample (the standard) is known, its abundance in the other can be determined. This test method is flexible in that the number of times a given material is admitted to the ion source may be adjusted to the minimum required for a specified precision level.
1.3 The sensitivity with which differences between two materials can be detected depends on the measuring system used, but ratio-measuring devices can generally read ratio-of-mol ratio differences as small as 0.0001.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 hazards statements are given in Section 7.
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Designation: C 1344 – 97 (Reapproved 2008)
Standard Test Method for
Isotopic Analysis of Uranium Hexafluoride by Single-
1
Standard Gas Source Mass Spectrometer Method
This standard is issued under the fixed designation C1344; 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 USEC-651, Uranium Hexafluoride: A Manual of Good
3
Handling Practices
1.1 Thistestmethodcoverstheisotopicanalysisofuranium
hexafluoride (UF ) and may be used for the entire range of
6
3. Terminology
235
U isotopic compositions for which standards are available.
3.1 Definitions of Terms Specific to This Standard:
1.2 This test method is applicable to the determination of
3.1.1 drop through, n—a measurement of the amount of the
the isotopic relationship between two UF samples. If the
6
238 + 235 +
UF ion beam that can be passed through the UF
5 5
abundance of a specific isotope of one sample (the standard) is
235 +
collector slit and measured on the UF collector, stated as
5
known, its abundance in the other can be determined.This test
238 +
a percentage of the total UF signal.
5
method is flexible in that the number of times a given material
3.1.2 memory corrections, n—corrections applied to the
is admitted to the ion source may be adjusted to the minimum
sample analysis results for memory effects.
required for a specified precision level.
3.1.3 memory effect, n—the inability of the mass spectrom-
1.3 The sensitivity with which differences between two
eter to omit completely the isotopic composition of the sample
materials can be detected depends on the measuring system
analyzed previously from attributing to the results of further
used, but ratio-measuring devices can generally read ratio-of-
samples analyzed.
mol ratio differences as small as 0.0001.
3.1.4 normal isotopic abundance material, n—UF havinga
6
1.4 The values stated in SI units are to be regarded as
235
value of 0.711 weight percent (wt%) U.
standard. No other units of measurement are included in this
235 238
3.1.5 ratio-of-mol-ratios, n—the mol ratio ( U/ U) of
standard.
the sample divided by the mol ratio of the standard, or the
1.5 This standard does not purport to address all of the
inverseconditionofthemolratioofthestandarddividedbythe
safety concerns, if any, associated with its use. It is the
mol ratio of the sample.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use. Specific hazards
4.1 Test Method—Theunknownsampleandastandardwith
statements are given in Section 7.
an isotopic composition close to that of the sample are
+
2. Referenced Documents introduced in sequence into the Neir mass spectrometer. UF
5
2 ions of the isotopes are focused through a mass-resolving
2.1 ASTM Standards:
collector slit and onto a faraday cup collector. Measurements
C787 Specification for Uranium Hexafluoride for Enrich-
235 + +
are made of UF to the total of the other UF isotopes.
5 5
ment
Withtheknowncompositionofthestandard,calculationofthe
C996 Specification for Uranium Hexafluoride Enriched to
235
235
U composition of the sample can be determined.
Less Than 5 % U
2.2 Other Document:
5. Significance and Use
5.1 Uraniumhexafluorideisabasicmaterialusedtoprepare
nuclear reactor fuel. To be suitable for this purpose, the
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC26onNuclear
material must meet the criteria for isotopic composition. This
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
test method is designed to determine whether the material
Test.
meets the requirements described in Specifications C787 and
Current edition approved Dec. 1, 2008. Published January 2009. Originally
approved in 1997. Last previous edition approved in 2003 as C1344–97 (2003). C996.
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 U.S. Enrichment Corporation, 6903 Rockledge Dr., Bethesda,
the ASTM website. MD 20817, http://www.usec.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C 1344 – 97 (2008)
5.2 ASTM Committee C-26 Safeguards Statement: replaced, repairs are made on the sample inlet system, or the
5.2.1 The material (uranium hexafluoride) to which this test instrument is refocused so the flow rate
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:C1344–97 (Reapproved 2003) Designation: C 1344 – 97 (Reapproved 2008)
Standard Test Method for
Isotopic Analysis of Uranium Hexafluoride by Single-
1
Standard Gas Source Mass Spectrometer Method
This standard is issued under the fixed designation C1344; 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
235
1.1 This test method covers the isotopic analysis of uranium hexafluoride (UF ) and may be used for the entire range of U
6
isotopic compositions for which standards are available.
1.2 This test method is applicable to the determination of the isotopic relationship between two UF samples. If the abundance
6
of a specific isotope of one sample (the standard) is known, its abundance in the other can be determined. This test method is
flexible in that the number of times a given material is admitted to the ion source may be adjusted to the minimum required for
a specified precision level.
1.3 The sensitivity with which differences between two materials can be detected depends on the measuring system used, but
ratio-measuring devices can generally read ratio-of-mol ratio differences as small as 0.0001.
1.4The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 hazards statements are given in Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
C787 Specification for Uranium Hexafluoride for Enrichment
235
C996 Specification for Uranium Hexafluoride Enriched to Less Than 5 % U
2.2 Other Document:
3
USEC-651, Uranium Hexafluoride: A Manual of Good Handling Practices
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
238 + 235 +
3.1.1 drop through, n—a measurement of the amount of the UF ion beam that can be passed through the UF collector
5 5
235 + 238 +
slit and measured on the UF collector, stated as a percentage of the total UF signal.
5 5
3.1.2 memory corrections, n—corrections applied to the sample analysis results for memory effects.
3.1.3 memory effect, n—the inability of the mass spectrometer to omit completely the isotopic composition of the sample
analyzed previously from attributing to the results of further samples analyzed.
235
3.1.4 normal isotopic abundance material, n—UF having a value of 0.711 weight percent (wt%) U.
6
235 238
3.1.5 ratio-of-mol-ratios, n—the mol ratio ( U/ U) of the sample divided by the mol ratio of the standard, or the inverse
condition of the mol ratio of the standard divided by the mol ratio of the sample.
4. Summary of Test Method
4.1 Test Method—The unknown sample and a standard with an isotopic composition close to that of the sample are introduced
+
insequenceintotheNeirmassspectrometer.UF ionsoftheisotopesarefocusedthroughamass-resolvingcollectorslitandonto
5
235 + +
a faraday cup collector. Measurements are made of UF to the total of the other UF isotopes. With the known composition
5 5
of the standard, calculation of the
235
U composition of the sample can be determined.
1
This test method is under the jurisdiction ofASTM Committee C26 on Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods ofTest.
Current edition approved Aug. 10, 1997. Published May 1997.
Current edition approved Dec. 1, 2008. Published January 2009. Originally approved in 1997. Last previous edition approved in 2003 as C1344–97 (2003).
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 12.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U.S. Enrichment Corporation, 6903 Rockledge Dr., Bethesda, MD 20817, http://www.usec.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C 1344 – 97 (2008)
5. Signific
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:C1344–97 (Reapproved 2003) Designation: C 1344 – 97 (Reapproved 2008)
Standard Test Method for
Isotopic Analysis of Uranium Hexafluoride by Single-
1
Standard Gas Source Mass Spectrometer Method
This standard is issued under the fixed designation C1344; 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
235
1.1 This test method covers the isotopic analysis of uranium hexafluoride (UF ) and may be used for the entire range of U
6
isotopic compositions for which standards are available.
1.2 This test method is applicable to the determination of the isotopic relationship between two UF samples. If the abundance
6
of a specific isotope of one sample (the standard) is known, its abundance in the other can be determined. This test method is
flexible in that the number of times a given material is admitted to the ion source may be adjusted to the minimum required for
a specified precision level.
1.3 The sensitivity with which differences between two materials can be detected depends on the measuring system used, but
ratio-measuring devices can generally read ratio-of-mol ratio differences as small as 0.0001.
1.4The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 hazards statements are given in Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
C787 Specification for Uranium Hexafluoride for Enrichment
235
C996 Specification for Uranium Hexafluoride Enriched to Less Than 5 % U
2.2 Other Document:
3
USEC-651, Uranium Hexafluoride: A Manual of Good Handling Practices
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
238 + 235 +
3.1.1 drop through, n—a measurement of the amount of the UF ion beam that can be passed through the UF collector
5 5
235 + 238 +
slit and measured on the UF collector, stated as a percentage of the total UF signal.
5 5
3.1.2 memory corrections, n—corrections applied to the sample analysis results for memory effects.
3.1.3 memory effect, n—the inability of the mass spectrometer to omit completely the isotopic composition of the sample
analyzed previously from attributing to the results of further samples analyzed.
235
3.1.4 normal isotopic abundance material, n—UF having a value of 0.711 weight percent (wt%) U.
6
235 238
3.1.5 ratio-of-mol-ratios, n—the mol ratio ( U/ U) of the sample divided by the mol ratio of the standard, or the inverse
condition of the mol ratio of the standard divided by the mol ratio of the sample.
4. Summary of Test Method
4.1 Test Method—The unknown sample and a standard with an isotopic composition close to that of the sample are introduced
+
insequenceintotheNeirmassspectrometer.UF ionsoftheisotopesarefocusedthroughamass-resolvingcollectorslitandonto
5
235 + +
a faraday cup collector. Measurements are made of UF to the total of the other UF isotopes. With the known composition
5 5
of the standard, calculation of the
235
U composition of the sample can be determined.
1
This test method is under the jurisdiction ofASTM Committee C26 on Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods ofTest.
Current edition approved Aug. 10, 1997. Published May 1997.
Current edition approved Dec. 1, 2008. Published January 2009. Originally approved in 1997. Last previous edition approved in 2003 as C1344–97 (2003).
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 12.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U.S. Enrichment Corporation, 6903 Rockledge Dr., Bethesda, MD 20817, http://www.usec.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
C 1344 – 97 (2008)
5. Signific
...
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