ASTM C787-06
(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 so that the corresponding enriched uranium is essentially equivalent to enriched uranium made entirely from virgin natural UF6; 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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C787 – 06
Standard Specification for
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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 C859 Terminology Relating to Nuclear Materials
C996 Specification for Uranium Hexafluoride Enriched to
1.1 This specification covers uranium hexafluoride (UF )
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235
Less Than 5 % U
intended for feeding to an enrichment plant. Included are
C1052 Practice for Bulk Sampling of Liquid Uranium
specifications for UF derived from unirradiated natural ura-
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Hexafluoride
nium and UF derived from irradiated uranium that has been
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C1295 Test Method for Gamma Energy Emission from
reprocessed and converted to UF for enrichment and subse-
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Fission Products in Uranium Hexafluoride and Uranyl
quent reuse. The objectives of this specification are twofold:
Nitrate Solution
(1) To define the impurity and uranium isotope limits for
2.2 ANSI Standard:
Commercial Natural UF feedstock so that the corresponding
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3
N14.1 Packaging of Uranium Hexafluoride for Transport
enriched uranium is essentially equivalent to enriched uranium
2.3 U.S. Government Documents:
made entirely from virgin natural UF ; and (2) To define
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Inspection, Weighing, and Sampling of Uranium Hexafluo-
additional limits for Reprocessed UF (or any mixture of
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ride Cylinders, Procedures for Handling and Analysis of
Reprocessed UF and Commercial Natural UF ). For such
6 6
Uranium Hexafluoride, Vol. 1, Department of Energy
UF , special provisions may be needed to ensure that no extra
6
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Report ORO-671-1, latest revision
hazard arises to the work force, process equipment, or the
environment.
The UF Manual: Good Handling Practices for Uranium
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1.2 The scope of this specification does not comprehen-
Hexafluoride, United States Enrichment Corporation Re-
sively cover all provisions for preventing criticality accidents
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port USEC-651, latest revision
or requirements for health and safety or for shipping. Obser-
NuclearSafetyGuide,U.S.NuclearRegulatoryCommission
vance of this specification does not relieve the user of the
Report TID-7016, Rev. 2, 1978, and ORNL-NUREG-
obligation to conform to all international, federal, state, and
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CSD-6
local regulations for processing, shipping, or in any other way
Clarke, H. K., Handbook of Nuclear Safety, Department of
using UF (see, for example, TID-7016, DP-532, ORNL-
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4
Energy Report DP-532
NUREG-CSD-6, and DOE O 474.1).
Control and Accountability of Nuclear Materials, DOE
1.3 The values stated in SI units are to be regarded as the
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Directive O 474.1
standard. The values given in parentheses are for information
only.
3. Terminology
2. Referenced Documents 3.1 Definitions of Terms Specific to This Standard—Terms
2 shall be defined in accordance with Terminology C859, except
2.1 ASTM Standards:
for the following:
C761 Test Methods for Chemical, Mass Spectrometric,
3.1.1 Commercial Natural UF —UF from natural unirra-
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Spectrochemical, Nuclear, and Radiochemical Analysis of
235
diated uranium (containing 0.711 6 0.004 g U per 100 g U).
Uranium Hexafluoride
3.1.1.1 Discussion—It is recognized that some contamina-
tion with reprocessed uranium may occur during routine
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processing. This is acceptable provided that the UF meets the
This specification is under the jurisdiction of ASTM Committee C26 on
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Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.02 on Fuel
requirements for Commercial Natural UF .
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and Fertile Material Specifications.
Current edition approved Jan. 1, 2006. Published February 2006. Originally
´2 3
approved in 1976. Last previous edition approved in 2003 as C787 – 03 . DOI: Available from American National Standards Institute, 11 W. 42nd St., 13th
10.1520/C0787-06. Floor, New York, NY 10036.
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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.
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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.
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C787 – 06
3.1.2 Reprocessed UF —any UF made from uranium that practically only by sampling from the inflow during the filling
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has been exposed in a neutron irradiation facility and subse- of the sh
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