ASTM C1883-19
(Practice)Standard Practice for Sampling of Gaseous Enriched Uranium Hexafluoride
Standard Practice for Sampling of Gaseous Enriched Uranium Hexafluoride
SIGNIFICANCE AND USE
5.1 The standard method for taking representative UF6 sample from a cylinder is collecting from UF6 liquid phase. Homogeneity of material is obtained by the basic indicator, that is, content of uranium isotope. Representativeness of a sample by other indicators such as content of highly volatile admixtures (boron fluoride, silicon fluoride, organic impurities), admixtures generating non-volatile fluorides may not be satisfactory owing to differences between physical properties of admixture and UF6. Nevertheless, such sampling is widely applied during the product quality control due to the fact that liquid phase process is applied when filling transport containers both for feedstock UF6 and enriched one. Refer to Practice C1052 for UF6 liquid phase sampling practice.
5.2 Uranium hexafluoride is normally produced and handled in large (typically 1 to 14-ton) quantities and must, therefore, be characterized by reference to representative samples (see ISO 7195:2005). The samples are used to determine compliance with the applicable commercial Specification C996. The quantities involved, physical properties, chemical reactivity, and hazardous nature of UF6 are such that for representative sampling, specially designed equipment must be used and operated in accordance with the most carefully controlled and stringent procedures. This practice can be used by UF6 enrichers to review the effectiveness of existing procedures or as a guide to the design of equipment and procedures for future use.
5.3 It is emphasized that this practice is not meant to address conventional or nuclear criticality safety issues.
SCOPE
1.1 This practice covers the methods for withdrawing samples of enriched uranium hexafluoride (UF6) during and after a transfer occurring in the gas phase in order to determine compliance with Specification C996. It is applicable to the filling of a transport UF6 container (30B cylinder or 1 m3 vertical container) at a centrifuge enrichment facility that has been fed with UF6 that complies with Specification C787.
1.2 Since UF6 sampling is taken during the filling process, this practice does not address any special additional arrangements that may be agreed upon between the buyer and the seller when the sampled bulk material is being added to residues already present in a container (“heels recycle”). Such arrangements will be based on QA procedures such as traceability of cylinder origin (to prevent, for example, contamination with irradiated material).
1.3 This practice is only applicable when the transfer occurs in the gas phase. When the transfer is performed in the liquid phase, Practice C1052 should apply.
1.4 The scope of this practice does not include provisions for preventing criticality incidents.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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.
1.7 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.
General Information
Relations
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:C1883 −19
Standard Practice for
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Sampling of Gaseous Enriched Uranium Hexafluoride
This standard is issued under the fixed designation C1883; 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 2. Referenced Documents
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2.1 ASTM Standards:
1.1 This practice covers the methods for withdrawing
C761 Test Methods for Chemical, Mass Spectrometric,
samples of enriched uranium hexafluoride (UF ) during and
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Spectrochemical, Nuclear, and RadiochemicalAnalysis of
after a transfer occurring in the gas phase in order to determine
Uranium Hexafluoride
compliance with Specification C996. It is applicable to the
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C787 Specification for Uranium Hexafluoride for Enrich-
filling of a transport UF container (30B cylinder or 1 m
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ment
vertical container) at a centrifuge enrichment facility that has
C859 Terminology Relating to Nuclear Materials
been fed with UF that complies with Specification C787.
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C996 Specification for Uranium Hexafluoride Enriched to
1.2 Since UF sampling is taken during the filling process,
235
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Less Than 5 % U
this practice does not address any special additional arrange-
C1052 Practice for Bulk Sampling of Liquid Uranium
ments that may be agreed upon between the buyer and the
Hexafluoride
seller when the sampled bulk material is being added to
C1441 Test Method for The Analysis of Refrigerant 114,
residues already present in a container (“heels recycle”). Such
Plus Other Carbon-Containing and Fluorine-Containing
arrangements will be based on QA procedures such as trace-
Compounds in Uranium Hexafluoride via Fourier-
ability of cylinder origin (to prevent, for example, contamina-
Transform Infrared (FTIR) Spectroscopy
tion with irradiated material).
C1842 TestMethodforTheAnalysisofBoronandSiliconin
1.3 This practice is only applicable when the transfer occurs Uranium Hexfluoride via Fourier-Transform Infrared
in the gas phase. When the transfer is performed in the liquid (FTIR) Spectroscopy
phase, Practice C1052 should apply. C1838 Practice for Cleaning for 1S and 2S Bottles
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2.2 ISO Standards:
1.4 The scope of this practice does not include provisions
ISO 7195:2005 Nuclear energy—Packaging of uranium
for preventing criticality incidents.
hexafluoride (UF ) for transport
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1.5 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
3. Terminology
only.
3.1 Terms shall be defined in accordance with Terminology
1.6 This standard does not purport to address all of the
C859, except for the following:
safety concerns, if any, associated with its use. It is the
3.2 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.2.1 container, n—a vessel either holding or receiving by
priate safety, health, and environmental practices and deter-
transfer, the UF to be sampled; it may consist of, for example,
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mine the applicability of regulatory limitations prior to use.
a fixed vessel in a UF handling plant or a cylinder to be used
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1.7 This international standard was developed in accor-
for the transport of UF .
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dance with internationally recognized principles on standard-
3.2.2 sample vessel, n—the small vessel into which the
ization established in the Decision on Principles for the
sample of UF is withdrawn for analysis in the laboratory for
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Development of International Standards, Guides and Recom-
characterization. It can be a 1S or 2S bottle or a PCTFE
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
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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
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This practice is under the jurisdiction of ASTM Committee C26 on Nuclear Standards volume information, refer to the standard’s Document Summary page on
Fuel Cycle and is the direct responsibility of Subcommittee C26.02 on Fuel and the ASTM website.
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Fertile Material Specifications. Available from International Organization for Standardization (ISO), ISO
Current edition approved June 15, 2019. Published July 2019. DOI: 10.1520/ Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
C1883-19. Geneva, Switzerland, http://www.iso.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1883−
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