ASTM C787-96
(Specification)Standard Specification for Uranium Hexafluoride for Enrichment
Standard Specification for Uranium Hexafluoride for Enrichment
SCOPE
1.1 This specification applies to uranium hexafluoride containing uranium of 235 U concentration not exceeding 5% 235 U intended for feed to an enrichment plant. This specification includes specifications for natural uranium hexafluoride (UF6) and UF6 that has been derived from irradiated uranium which has been reprocessed, and converted to UF6 for enrichment and subsequent reuse. The objectives of this specification are twofold: ( ) To define the impurity and uranium isotope limits for commercial natural UF6 feedstock so that the corresponding enriched product is essentially equivalent to enriched product made entirely from virgin natural UF6 and ( ) To define additional limits for reprocessed UF6 (or any mixture of reprocessed and commercial natural). For such UF6, special provisions may need to be made to ensure that no extra hazard arises to the employees, process equipment, or the environment.
1.2 This specification does not comprehensively cover all provisions for preventing criticality accidents or requirements for health and safety or for shipping. Observance of this standard 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-NUREGCSD-6, and DOE 5633.3).
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are given for information only.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: C 787 – 96
Standard Specification for
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Uranium Hexafluoride for Enrichment
This standard is issued under the fixed designation C 787; 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.
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1. Scope Fission Products in Uranium Hexafluoride
2.2 ANSI Standard:
1.1 This specification covers uranium hexafluoride (UF )
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N14.1 Packaging of Uranium Hexafluoride for Transport
intended for feeding to an enrichment plant. Included are
2.3 U.S. Government Documents:
specifications for UF derived from unirradiated natural ura-
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Inspection, Weighing, and Sampling of Uranium Hexafluo-
nium and UF derived from irradiated uranium that has been
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ride Cylinders, Procedures for Handling and Analysis of
reprocessed and converted to UF for enrichment and subse-
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Uranium Hexafluoride, Vol. 1, DOE Report ORO-671-1,
quent reuse. The objectives of this specification are twofold:
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latest revision
(1) To define the impurity and uranium isotope limits for
Uranium Hexafluoride: A Manual of Good Handling Prac-
Commercial Natural UF feedstock so that the corresponding
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tices, United States Enrichment Corporation Report
enriched uranium is essentially equivalent to enriched uranium
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USEC-651, latest revision
made entirely from virgin natural UF ; and (2) To define
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NuclearSafetyGuide,U.S.NuclearRegulatoryCommission
additional limits for Reprocessed UF (or any mixture of
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Report TID-7016, Rev. 2, 1978, and ORNL-NUREG-
Reprocessed UF and Commercial Natural UF ). For such
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CSD-6
UF , special provisions may be needed to ensure that no extra
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Clarke, H. K., Handbook of Nuclear Safety, DOE Report
hazard arises to the work force, process equipment, or the
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DP-532
environment.
Control and Accountability of Nuclear Materials, Basic
1.2 The scope of this specification does not comprehen-
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Principles, U.S. DOE Order 5633.3
sively cover all provisions for preventing criticality accidents
or requirements for health and safety or for shipping. Obser-
3. Terminology
vance of this specification does not relieve the user of the
3.1 Definitions of Terms Specific to This Standard—Terms
obligation to conform to all international, federal, state, and
shall be defined in accordance with Terminology C 859C 859,
local regulations for processing, shipping, or in any other way
except for the following:
using UF (see, for example, TID-7016, DP-532, ORNL-
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3.1.1 Commercial Natural UF —UF from natural unirra-
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NUREG-CSD-6, and DOE 5633.3B).
235
diated uranium (containing 0.711 6 0.004 g U per 100 g U).
1.3 The values stated in SI units are to be regarded as the
3.1.1.1 Discussion—It is recognized that some contamina-
standard. The values given in parentheses are for information
tion with reprocessed uranium may occur during routine
only.
processing. This is acceptable provided that the UF meets the
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2. Referenced Documents requirements for Commercial Natural UF .
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3.1.2 Reprocessed UF —any UF made from uranium that
2.1 ASTM Standards: 6 6
has been exposed in a neutron irradiation facility and subse-
C 761 Test Methods for Chemical, Mass Spectrometric,
quently chemically separated from the fission products and
Spectrochemical, Nuclear, and Radiochemical Analysis of
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transuranic isotopes so generated.
Uranium Hexafluoride
2 3.1.2.1 Discussion—The requirements for Reprocessed UF
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C 859 Terminology Relating to Nuclear Materials
given in this specification are intended to be typical of
C 1052 Practice for Bulk Sampling of Liquid Uranium
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reprocessed spent fuel that has achieved burnup levels of up to
Hexafluoride
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50 000 MW days per tonne of uranium in light water reactors
C 1219 Test Methods forArsenic in Uranium Hexafluoride
and has been cooled for ten years after discharge. It is
C 1295 Test Method for Gamma Energy Emission from
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This specification is under the jurisdiction of ASTM Committee C-26 on Available from American National Standards Institute, 11 W. 42nd St., 13th
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.02 on Fuel Floor, New York, NY 10036.
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and Fertile Material Specifications. Available from Superintendent of Documents, U.S. Government Printing
Current edition approved July 10, 1996. Published September 1996. Originally Office, Washington, DC 20402.
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published as C 787 – 76. Last previous edition C 787 – 90. Available from United States Enrichment Corporation, 6903 Rockledge Drive,
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Annual Book of ASTM Standards, Vol 12.01. Bethesda, MD 20817.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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