ASTM C1052-14
(Practice)Standard Practice for Bulk Sampling of Liquid Uranium Hexafluoride
Standard Practice for Bulk Sampling of Liquid Uranium Hexafluoride
SIGNIFICANCE AND USE
5.1 Uranium hexafluoride is normally produced and handled in large (typically 1- to 20-ton) quantities and must, therefore, be characterized by reference to representative samples. 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 indicates appropriate principles, equipment, and procedures currently in use for bulk sampling of liquid UF6. It is used by UF6 converters, enrichers, and fuel fabricators to review the effectiveness of existing procedures or as a guide to the design of equipment and procedures for future use.
5.2 It is emphasized that this practice is not meant to address conventional or nuclear criticality safety issues.
SCOPE
1.1 This practice covers methods for withdrawing representative samples of liquid uranium hexafluoride (UF6) from bulk quantities of the material. Such samples are used for determining compliance with the applicable commercial specification, for example Specification C787 and Specification C996.
1.2 It is assumed that the bulk liquid UF6 being sampled comprises a single quality and quantity of material. This practice does not address any special additional arrangements that might be required for taking proportional or composite samples. When the sampled bulk material is being added to UF6 residues already in a container (“heels recycle”) additional arrangements are required to avoid cross contamination of the bulk UF6, these are addressed in the appropriate section (8.2) of Specifications C787 and C996.
1.3 The number of samples to be taken, their nominal sample weight, and their disposition shall be agreed upon between the parties.
1.4 The scope of this practice does not include provisions for preventing criticality incidents.
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.
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Designation:C1052 −14
Standard Practice for
1
Bulk Sampling of Liquid Uranium Hexafluoride
This standard is issued under the fixed designation C1052; 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 2.2 Other Documents:
USEC-651 Uranium Hexafluoride: A Manual of Good Han-
1.1 This practice covers methods for withdrawing represen-
3
dling Practices
tative samples of liquid uranium hexafluoride (UF ) from bulk
6
ANSI N14.1 Uranium Hexafluoride: Packaging for Trans-
quantities of the material. Such samples are used for determin-
4
port
ing compliance with the applicable commercial specification,
ISO/DIS 7195 Packaging of Uranium Hexafluoride (UF )
6
for example Specification C787 and Specification C996.
4
for Transport
1.2 It is assumed that the bulk liquid UF being sampled
6
comprises a single quality and quantity of material. This
3. Terminology
practice does not address any special additional arrangements
3.1 Definitions of Terms Specific to This Standard:
that might be required for taking proportional or composite
3.1.1 container—the bulk vessel either holding or receiving
samples. When the sampled bulk material is being added to
by transfer, the UF to be sampled; it may consist of, for
6
UF residues already in a container (“heels recycle”) additional
6
example, a fixed vessel in a UF handling plant or a cylinder to
6
arrangements are required to avoid cross contamination of the
be used for the transport of UF .
6
bulk UF , these are addressed in the appropriate section (8.2)
6
3.1.2 sample bottle—the small vessel into which the sample
of Specifications C787 and C996.
of UF is withdrawn for transfer to the laboratory for charac-
6
1.3 The number of samples to be taken, their nominal
terization.
sample weight, and their disposition shall be agreed upon
between the parties.
4. Summary of Practice
1.4 The scope of this practice does not include provisions
4.1 Two methods of withdrawing a sample are described,
for preventing criticality incidents.
namely: (1) direct withdrawal from a filled container and (2)
withdrawal from the inlet-line during the filling of a container
1.5 This standard does not purport to address all of the
by liquid transfer. The first method involves tilting or turning
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- the container in such a way that its valve is below the surface
of the liquefied UF , and dependent on the equipment, this
priate safety and health practices and determine the applica-
6
requires that the container holds more than a specified mini-
bility of regulatory limitations prior to use.
mum quantity of UF . Liquid UF is withdrawn into a
6 6
graduatedvolumeandthentransferredtotherespectivesample
2. Referenced Documents
bottle(s). In the second method, a small proportion of the UF
2
6
2.1 ASTM Standards:
flowing from one container to another is withdrawn into a
C787 Specification for Uranium Hexafluoride for Enrich-
graduatedvolumeandthentransferredtotherespectivesample
ment
bottle(s).
C996 Specification for Uranium Hexafluoride Enriched to
235
4.2 For both methods of sampling, the presence of residues
Less Than 5 % U
may have significant implications for the quality of the UF .
6
For safety and quality reasons, containers and bottles shall be
clean, dry, and empty before filling.
1
This practice is under the jurisdiction of ASTM Committee C26 on Nuclear
Fuel Cycle and is the direct responsibility of Subcommittee C26.02 on Fuel and
4.3 Various types of sample bottles are in use and are
Fertile Material Specifications.
described in detail in the applicable national and international
Current edition approved Jan. 15, 2014. Published February 2014. Originally
approved in 1985. Last previous edition approved in 2007 as C1052 – 01 (2007).
DOI: 10.1520/C1052-14.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or AvailablefromUnitedStatesEnrichmentCorp.,6903RockledgeDr.,Bethesda,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM MD 20817.
4
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute, 11 W. 42nd St., 13th
the ASTM website. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C1052−14
standards, for example,ANSI N14.1 and ISO/DIS 7195. For a of UF corrosion resistance, and hence, internal surfaces are
6
given type of sample bott
...
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: C1052 − 01 (Reapproved 2007) C1052 − 14
Standard Practice for
1
Bulk Sampling of Liquid Uranium Hexafluoride
This standard is issued under the fixed designation C1052; 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 practice covers methods for withdrawing representative samples of liquid uranium hexafluoride (UF ) from bulk
6
quantities of the material. Such samples are used for determining compliance with the applicable commercial specification, for
example Specification C787 and Specification C996.
1.2 It is assumed that the bulk liquid UF being sampled comprises a single quality and quantity of material. This practice does
6
not address any special additional arrangements that might be required for taking proportional or composite samples, or when
samples. When the sampled bulk material is being added to UF residues already in a container (“heels recycle”).recycle”)
6
additional arrangements are required to avoid cross contamination of the bulk UF , these are addressed in the appropriate section
6
(8.2) of Specifications C787 and C996.
1.3 The number of samples to be taken, their nominal sample weight, and their disposition shall be agreed upon between the
parties.
1.4 The scope of this practice does not include provisions for preventing criticality incidents.
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.
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 Documents:
3
USEC-651 Uranium Hexafluoride: A Manual of Good Handling Practices
4
ANSI N14.1 Uranium Hexafluoride: Packaging for Transport
4
ISO/DIS 7195 Packaging of Uranium Hexafluoride (UF ) for Transport
6
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 container—the bulk vessel either holding or receiving by transfer, the UF to be sampled; it may consist of, for example,
6
a fixed vessel in a UF handling plant or a cylinder to be used for the transport of UF .
6 6
3.1.2 sample bottle—the small vessel into which the sample of UF is withdrawn for transfer to the laboratory for
6
characterization.
4. Summary of Practice
4.1 Two methods of withdrawing a sample are described, namely: (1) direct withdrawal from a filled container and (2)
withdrawal from the inlet-line during the filling of a container by liquid transfer. The first method involves tilting or turning the
1
This practice is under the jurisdiction of ASTM Committee C26 on Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.02 on Fuel and Fertile
Material Specifications.
Current edition approved June 1, 2007Jan. 15, 2014. Published July 2007February 2014. Originally approved in 1985. Last previous edition approved in 20012007 as
C1052 – 01.C1052 – 01 (2007). DOI: 10.1520/C1052-01R07.10.1520/C1052-14.
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 United States Enrichment Corp., 6903 Rockledge Dr., Bethesda, MD 20817.
4
Available from American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1052 − 14
container in such a way that its valve is below the surface of the liquefied UF , and dependent on the equipment, this requires that
6
the container holds more than a specified minimum quantity of UF . Liquid UF is withdrawn into a graduated volume and then
6 6
transferred to the respective sample bottle(s). In the second method, a small proportion of the UF flowing from one container to
6
another is withdrawn into a graduated volume and then transferred to the respective sample bottle(s).
4.2 For both methods of sampling, the presence of residues may have significant implicat
...
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