ASTM C1842-16

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:C1842 −16
Standard Test Method for
The Analysis of Boron and Silicon in Uranium Hexfluoride
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via Fourier-Transform Infrared (FTIR) Spectroscopy
This standard is issued under the fixed designation C1842; 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.
1. Scope 2.2 Other Documents:
ANSI N14.1 Nuclear Materials – Uranium Hexfluo-
1.1 This test method is suitable for determining boron and
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ride–Packaging for Transport
silicon impurities as BF and SiF in uranium hexafluoride.
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ISO 7195 Nuclear Energy – Packaging of Uranium
This test method is an alternative to those described in Test
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Hexafluoride (UF ) for Transport
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Methods C761 and C1771.
3. Terminology
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3.1 Except as otherwise defined herein, definitions of terms
standard.
are as given in Terminology C859.
1.3 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 detection limit, n—based on the minimum absorbance
responsibility of the user of this standard to establish appro-
obtainable at a given pressure to yield a meaningful result. In
priate safety and health practices and determine the applica-
accordance with Terminology C859, a low concentration level
bility of regulatory limitations prior to use.
could be achieved with these methods.
3.2.2 FTIR, n—Fourier-transform infrared spectroscopy.
2. Referenced Documents
3.2.3 K, n—infrared absorbance constant in pressure units
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2.1 ASTM Standards:
[1/Pa], K = OD/Pressure.
C761Test Methods for Chemical, Mass Spectrometric,
3.2.4 “1S” container, n—a nickel or Monel container as
Spectrochemical,Nuclear,andRadiochemicalAnalysisof
described in ANSI N14.1.
Uranium Hexafluoride
C787Specification for Uranium Hexafluoride for Enrich-
4. Summary of Test Method
ment
4.1 ToperformtheFourier-TransformInfrared(FTIR)spec-
C859Terminology Relating to Nuclear Materials
troscopic analysis of boron and silicon impurities in uranium
C996Specification for Uranium Hexafluoride Enriched to
235 hexafluoride,asamplemustbecollectedina“1S”containeror
Less Than 5% U
equivalent with the methods described in Practices C1052 or
C1052Practice for Bulk Sampling of Liquid Uranium
C1703.
Hexafluoride
C1703 Practice for Sampling of Gaseous Uranium 4.2 The bottle is kept at room temperature. The manifold
Hexafluoride andthesamplecellaremaintainedat50°C.Intheseconditions,
C1771Test Method for Determination of Boron, Silicon, UF ismainlyinsolidphaseinthebottleandboronandsilicon
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and Technetium in Hydrolyzed Uranium Hexafluoride by are present in the gaseous phase of manifold. In this medium,
Inductively Coupled Plasma—Mass Spectrometer After
the boron and silicon chemical forms are respectively BF and
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Removal of Uranium by Solid Phase Extraction SiF .
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4.3 The test method is based on the analysis in the gas
phase. The gas phase is analyzed at 50°C by FTIR spectrom-
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ThistestmethodisunderthejurisdictionofASTMCommitteeC26onNuclear
etry to determine the B and Si concentration in uranium
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
hexafluoride.
Test.
Current edition approved June 1, 2016. Published July 2016. DOI: 10.1520/
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C1842-16. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4th Floor, New York, NY 10036, http://www.ansi.org.
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from International Organization for Standardization (ISO), ISO
Standards volume information, refer to the standard’s Document Summary page on Central Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,
the ASTM website. Geneva, Switzerland, http://www.iso.org.
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C1842−16
4.4 The manifold and sample cell are filled at the vapor 7.2 A Manifold System, built with materials of construction
pressure of UF at room temperature (near 12 kPa). inert to fluorine-bearing gases. The manifold system shall be
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conditioned and passivated with an appropriate fluorinating
4.5 After a screening, if the spectrum is the UF spectrum,
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agent.
...