ASTM C787-15
(Specification)Standard Specification for Uranium Hexafluoride for Enrichment
Standard Specification for Uranium Hexafluoride for Enrichment
ABSTRACT
This specification covers uranium hexafluoride intended for feeding to an enrichment plant. Plants preparing uranium hexafluoride will have to control the purity of process chemicals and also employ low corrosion equipment to be successful in meeting the specifications for most impurities. Chemical and isotopic analysis of the material shall conform to the requirements prescribed.
SCOPE
1.1 This specification covers uranium hexafluoride (UF6) intended for feeding to an enrichment plant. Included are specifications for UF6 derived from unirradiated natural uranium and UF6 derived from irradiated uranium that has been reprocessed and converted to UF6 for enrichment and subsequent reuse. The objectives of this specification are twofold: (1) To define the impurity and uranium isotope limits for Commercial Natural UF6 feedstock; and (2) To define additional limits for Reprocessed UF6 (or any mixture of Reprocessed UF6 and Commercial Natural UF6). For such UF6, special provisions may be needed to ensure that no extra hazard arises to the work force, process equipment, or the environment.
1.2 The scope of this specification does not comprehensively cover all provisions for preventing criticality accidents or requirements for health and safety or for shipping. Observance of this specification does not relieve the user of the obligation to conform to all international, federal, state, and local regulations for processing, shipping, or in any other way using UF6 (see, for example, TID-7016, DP-532, ORNL-NUREG-CSD-6, and DOE O 474.1).
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation:C787 −15
Standard Specification for
1
Uranium Hexafluoride for Enrichment
This standard is issued under the fixed designation C787; 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.
235
1. Scope Less Than 5 % U
C1052Practice for Bulk Sampling of Liquid Uranium
1.1 This specification covers uranium hexafluoride (UF )
6
Hexafluoride
intended for feeding to an enrichment plant. Included are
C1295Test Method for Gamma Energy Emission from
specifications for UF derived from unirradiated natural ura-
6
Fission and Decay Products in Uranium Hexafluoride and
nium and UF derived from irradiated uranium that has been
6
Uranyl Nitrate Solution
reprocessed and converted to UF for enrichment and subse-
6
C1703 Practice for Sampling of Gaseous Uranium
quent reuse. The objectives of this specification are twofold:
Hexafluoride
(1) To define the impurity and uranium isotope limits for
2.2 ANSI Standard:
Commercial Natural UF feedstock; and (2) To define addi-
6
3
N14.1Packaging of Uranium Hexafluoride for Transport
tional limits for Reprocessed UF (or any mixture of Repro-
6
cessed UF and Commercial Natural UF ). For such UF , 2.3 U.S. Government Documents:
6 6 6
specialprovisionsmaybeneededtoensurethatnoextrahazard Inspection, Weighing, and Sampling of Uranium Hexafluo-
arises to the work force, process equipment, or the environ- ride Cylinders, Procedures for Handling and Analysis of
ment. Uranium Hexafluoride, Vol. 1,Department of Energy
4
Report ORO-671-1, latest revision
1.2 The scope of this specification does not comprehen-
sively cover all provisions for preventing criticality accidents
The UF Manual: Good Handling Practices for Uranium
6
or requirements for health and safety or for shipping. Obser-
Hexafluoride, United States Enrichment Corporation Re-
vance of this specification does not relieve the user of the
5
port USEC-651,latest revision
obligation to conform to all international, federal, state, and
NuclearSafetyGuide,U.S.NuclearRegulatoryCommission
local regulations for processing, shipping, or in any other way
Report TID-7016,Rev. 2, 1978, and ORNL-NUREG-
using UF (see, for example, TID-7016, DP-532, ORNL-
6
4
CSD-6
NUREG-CSD-6, and DOE O 474.1).
Clarke, H. K., Handbook of Nuclear Safety, Department of
4
1.3 The values stated in SI units are to be regarded as the
Energy Report DP-532
standard. The values given in parentheses are for information
Control and Accountability of Nuclear Materials, DOE
4
only.
Directive O 474.1
2. Referenced Documents
3. Terminology
2
2.1 ASTM Standards:
3.1 Definitions of Terms Specific to This Standard:
C761Test Methods for Chemical, Mass Spectrometric,
3.1.1 Terms shall be defined in accordance with Terminol-
Spectrochemical,Nuclear,andRadiochemicalAnalysisof
ogy C859, except for the following:
Uranium Hexafluoride
3.1.2 Commercial Natural UF —UF from natural unirra-
6 6
235
C859Terminology Relating to Nuclear Materials
diateduranium(containing0.711 60.004g Uper100gU).
C996Specification for Uranium Hexafluoride Enriched to
3.1.2.1 Discussion—It is recognized that some contamina-
tion with reprocessed uranium may occur during routine
processing. This is acceptable provided that the UF meets the
6
1
This specification is under the jurisdiction of ASTM Committee C26 on
requirements for Commercial Natural UF .
6
NuclearFuelCycleandisthedirectresponsibilityofSubcommitteeC26.02onFuel
and Fertile Material Specifications.
CurrenteditionapprovedJuly1,2015.PublishedJuly2015.Originallyapproved
3
in 1976. Last previous edition approved in 2011 as C787–11. DOI: 10.1520/ Available from American National Standards Institute, 11 W. 42nd St., 13th
C0787-15. Floor, New York, NY 10036.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Superintendent of Documents, U.S. Government Printing
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Office, Washington, DC 20402.
5
Standards volume information, refer to the standard’s Document Summary page on Available from United States Enrichment Corporation, 6903 Rockledge Drive,
the ASTM website. Bethesda, MD 20817.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C787−15
3.1.3 Reprocessed UF —any UF made from uranium that can be assumed. If the UF has not been liquefied, compliance
6 6 6
has been exposed in a neutron irradiation facility and subse- must be demonstrated.An alternative means of demonstrating
quently chemically separated from the fission products and complianc
...
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: C787 − 11 C787 − 15
Standard Specification for
1
Uranium Hexafluoride for Enrichment
This standard is issued under the fixed designation C787; 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 specification covers uranium hexafluoride (UF ) intended for feeding to an enrichment plant. Included are
6
specifications for UF derived from unirradiated natural uranium and UF derived from irradiated uranium that has been
6 6
reprocessed and converted to UF for enrichment and subsequent reuse. The objectives of this specification are twofold: (1) To
6
define the impurity and uranium isotope limits for Commercial Natural UF feedstock so that the corresponding enriched uranium
6
is essentially equivalent to enriched uranium made entirely from virgin natural UFfeedstock; ; and (2) To define additional limits
6
for Reprocessed UF (or any mixture of Reprocessed UF and Commercial Natural UF ). For such UF , special provisions may
6 6 6 6
be needed to ensure that no extra hazard arises to the work force, process equipment, or the environment.
1.2 The scope of this specification does not comprehensively cover all provisions for preventing criticality accidents or
requirements for health and safety or for shipping. Observance of this specification does not relieve the user of the obligation to
conform to all international, federal, state, and local regulations for processing, shipping, or in any other way using UF (see, for
6
example, TID-7016, DP-532, ORNL-NUREG-CSD-6, and DOE O 474.1).
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
2. Referenced Documents
2
2.1 ASTM Standards:
C761 Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium
Hexafluoride
C859 Terminology Relating to Nuclear Materials
235
C996 Specification for Uranium Hexafluoride Enriched to Less Than 5 % U
C1052 Practice for Bulk Sampling of Liquid Uranium Hexafluoride
C1295 Test Method for Gamma Energy Emission from Fission and Decay Products in Uranium Hexafluoride and Uranyl Nitrate
Solution
C1703 Practice for Sampling of Gaseous Uranium Hexafluoride
2.2 ANSI Standard:
3
N14.1 Packaging of Uranium Hexafluoride for Transport
2.3 U.S. Government Documents:
Inspection, Weighing, and Sampling of Uranium Hexafluoride Cylinders, Procedures for Handling and Analysis of Uranium
4
Hexafluoride, Vol. 1, Department of Energy Report ORO-671-1, latest revision
The UF Manual: Good Handling Practices for Uranium Hexafluoride, United States Enrichment Corporation Report
6
5
USEC-651, latest revision
4
Nuclear Safety Guide, U.S. Nuclear Regulatory Commission Report TID-7016, Rev. 2, 1978, and ORNL-NUREG-CSD-6
4
Clarke, H. K., Handbook of Nuclear Safety, Department of Energy Report DP-532
4
Control and Accountability of Nuclear Materials, DOE Directive O 474.1
1
This specification 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, 2011July 1, 2015. Published July 2011July 2015. Originally approved in 1976. Last previous edition approved in 20062011 as
C787 – 06.C787 – 11. DOI: 10.1520/C0787-11.10.1520/C0787-15.
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 American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.
4
Available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.
5
Available from United States Enrichment Corporation, 6903 Rockledge Drive, Bethesda, MD 20817.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C787 − 15
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 Terms shall be defined in accordance with Terminology C859, except for the following:
235
3.1.2 Commercial Natural UF —UF from natural unirradiated uranium (containing 0.711 6 0.004 g U per 100 g U).
6 6
...
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