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ASTM C1539-02

(Test Method)

Standard Test Method for Determination of Technetium-99 in Uranium Hexafluoride by Liquid Scintillation Counting (Withdrawn 2008)

Standard Test Method for Determination of Technetium-99 in Uranium Hexafluoride by Liquid Scintillation Counting (Withdrawn 2008)

SIGNIFICANCE AND USE
Uranium hexafluoride is a basic material used to prepare nuclear reactor fuel. To be suitable for this purpose, the material must meet the criteria for technetium composition. This test method is designed to determine whether the material meets the requirements described in Specifications C 787 and C 996.
Using the specified instrumentation and parameters, this method has a lower detection limit of 0.0004μgTc/gU.
Note 1—Different instrumentation or parameters may provide varying detection limits, as calculated in 11.4.
SCOPE
1.1 This test method is a quantitative method used to determine technetium-99 (99Tc) in uranium hexafluoride (UF 6) by liquid scintillation counting.
1.2 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.
WITHDRAWN RATIONALE
This standard was withdrawn with no replacement due to lack of use and relevancy in the industry.

General Information

Status
Historical
Publication Date
09-Jul-2002
Withdrawal Date
14-Jan-2008
ICS
71.040.01 - Analytical chemistry in general
Technical Committee
C26 - Nuclear Fuel Cycle
Drafting Committee
C26.05 - Methods of Test
Current Stage
Ref Project

Relations

Replaced By
ASTM C1539-08 - Standard Test Method for Determination of Technetium-99 in Uranium Hexafluoride by Liquid Scintillation Counting
Effective Date
01-Jul-2008
Referred By
ASTM C761-18 - Standard Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium Hexafluoride
Effective Date
10-Jul-2002

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ASTM C1539-02 - Standard Test Method for Determination of Technetium-99 in Uranium Hexafluoride by Liquid Scintillation Counting (Withdrawn 2008)ASTM C1539-02 - Standard Test Method for Determination of Technetium-99 in Uranium Hexafluoride by Liquid Scintillation Counting (Withdrawn 2008)
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ASTM C1539-02 - Standard Test Method for Determination of Technetium-99 in Uranium Hexafluoride by Liquid Scintillation Counting (Withdrawn 2008)
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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: C 1539 – 02
Standard Test Method for
Determination of Technetium-99 in Uranium Hexafluoride by
1
Liquid Scintillation Counting
This standard is issued under the fixed designation C 1539; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope of that isotope, but each with different quench. Sample quench
is typically quantified by a variety of parameters.
1.1 This test method is a quantitative method used to
99
determine technetium-99 ( Tc) in uranium hexafluoride (UF )
6
4. Summary of Test Method
by liquid scintillation counting.
4.1 Ameasured portion of hydrolyzed uranium hexafluoride
1.2 This standard does not purport to address all of the
(UF ) containing approximately 0.8 to 1.2 g of uranium or a
6
safety concerns, if any, associated with its use. It is the
volume of sample less than or equal to 30 mL is transferred to
responsibility of the user of this standard to establish appro-
a centrifuge tube. The uranium is precipitated using ammo-
priate safety and health practices and determine the applica-
niumhydroxide.Aftercentrifuging,thedecantedsupernatantis
bility of regulatory limitations prior to use.
acidified with sulfuric acid and extracted with tributyl phos-
2. Referenced Documents phate. An aliquot of the extract is transferred to a scintillation
vial, where stannous chloride in hydrochloric acid and liquid
2.1 ASTM Standards:
99
scintillation cocktail are added. The Tc beta activity is then
C 787 Specification for Uranium Hexafluoride for Enrich-
2
determined by liquid scintillation counting.
ment
C 996 Specification for Uranium Hexafluoride Enriched to
5. Significance and Use
235
2
Less that 5 % U
5.1 Uraniumhexafluorideisabasicmaterialusedtoprepare
C 1215 Guide for Preparing and Interpreting Precision and
nuclear reactor fuel. To be suitable for this purpose, the
Bias Statements in Test Method Standards Used in the
2
material must meet the criteria for technetium composition.
Nuclear Industry
This test method is designed to determine whether the material
2.2 Other Document:
meets the requirements described in Specifications C 787 and
USEC-651 Uranium Hexafluoride:AManual of Good Han-
3 C 996.
dling Practices
5.2 Using the specified instrumentation and parameters, this
3. Terminology method has a lower detection limit of 0.0004µgTc/gU.
3.1 Definitions:
NOTE 1—Different instrumentation or parameters may provide varying
3.1.1 quench standard curve—a relationship between detection limits, as calculated in 11.4.
sample quench and detection efficiency.Aquench curve for an
6. Apparatus
isotope in a given cocktail and vial combination is developed
4
by counting a series of standards containing the same activity 6.1 Liquid Scintillation Counter , with alpha/beta discrimi-
nation and enhanced low level discrimination over the entire
energy range of 0 to 2000 keV.
1
This test method is under the jurisdiction ofASTM Committee C26 on Nuclear
6.2 Centrifuge.
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
6.3 Analytical Balance, 1 mg sensitivity.
Test.
6.4 Separatory Funnel, 125 mL volume.
Current edition approved July 10, 2002. Published August 2002.
2
Annual Book of ASTM Standards, Vol 12.01.
3
Available from U.S. Enrichment Corporation, 6903 Rockledge Drive, Be-
4
thesda, MD 20817. Packard Tri-Carb Model 1905 AB/LA has been found to be acceptable.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
C1539–02
6.5 Liquid Scintillation Vials,20mL. 9.1.2 Standard—Laboratory control sample with a
99
6.6 Centrifuge Tubes with Caps,50mL. known Tc concentration.
6.7 Laboratory Wipes, lint free disposable. 9.1.3 Spike Solution—UF sample spiked with a known
6
99
concentration of Tc (approximately ten times the sample
7. Reagents and Materials
activity).
7.1 Purity of Reagents—Reagent grade chemicals shall be 9.2 Add 2 drops of potassium permanganate solution (1 %
W/V) and swirl to mix.
used in all tests. Unless otherwise indicated, it is intended that
all reagents conform to the specifications of the Committee of 9.3 Dilute with water to approximately 35 mL and swirl to
mix.
Analytical Reagents of the American Chemical Society where
5
specifications are available. 9.4 Add 5 mL concentrated ammonium hydroxide to pre-
cipitate uranium.
7.2 Purity of Water—Unless otherwise indicated, references
to water shall be understood to mean laboratory accepted 9.5 Dilute with deionized water to 50 mL.
9.6 Cap and shake vigorously to break up large particles of
deion
...

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