ASTM C1346-19
(Practice)Standard Practice for Dissolution of UF6 from P-10 Tubes
Standard Practice for Dissolution of UF<inf>6</inf> from P-10 Tubes
SIGNIFICANCE AND USE
5.1 Uranium hexafluoride is a basic material used to prepare nuclear reactor fuel. To be suitable for this purpose the material must meet criteria for uranium content, isotopic composition and metallic impurities in Specification C787 and C996. This practice results in the complete dissolution of the sample for uranium and impurities analysis, and determination of isotopic distribution by mass spectrometry as described in, for example, Test Methods C761.
SCOPE
1.1 This practice covers the dissolution of UF6 from a P-10 tube to provide solutions for analysis.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific safeguard and safety precaution statements, see Section 9.
1.4 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.
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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: C1346 − 19
Standard Practice for
1,2
Dissolution of UF from P-10 Tubes
6
This standard is issued under the fixed designation C1346; 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 C996Specification for Uranium Hexafluoride Enriched to
235
Less Than 5% U
1.1 This practice covers the dissolution of UF from a P-10
6
D1193Specification for Reagent Water
tube to provide solutions for analysis.
1.2 The values stated in SI units are to be regarded as
3. Terminology
standard. No other units of measurement are included in this
3.1 Definitions:
standard.
3.1.1 For definitions of terms relating to the nuclear fuel
1.3 This standard does not purport to address all of the
cycle, refer to Terminology C859.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4. Summary of Practice
priate safety, health, and environmental practices and deter-
4.1 UF samples intended for analysis are packaged in P-10
6
mine the applicability of regulatory limitations prior to use.
tubes to prevent sublimation and reaction with moisture in the
For specific safeguard and safety precaution statements, see
air. The P-10 tube assembly (Fig. 1) consists of a Polychloro-
Section 9.
trifluoroethylene (PCTFE) tube containing the UF , a PCTFE
6
1.4 This international standard was developed in accor-
gasket to cover the tube’s opening, and a nut and plug (Monel
dance with internationally recognized principles on standard-
or SS) to seal the gasket to the tube.
ization established in the Decision on Principles for the
4.2 The UF tube is weighed, cooled in liquid nitrogen, and
6
Development of International Standards, Guides and Recom-
quickly opened and immersed in water for dissolution. The
mendations issued by the World Trade Organization Technical
pieces of the tube’s assembly are removed from the resulting
Barriers to Trade (TBT) Committee.
solution,rinsed,dried,reassembled,andweighed.Thesolution
is dried for gravimetric conversion to U O , or diluted to an
3 8
2. Referenced Documents
appropriate concentration for dispensing into aliquots for
3
2.1 ASTM Standards:
subsequent analysis.
C761Test Methods for Chemical, Mass Spectrometric,
Spectrochemical,Nuclear,andRadiochemicalAnalysisof
5. Significance and Use
Uranium Hexafluoride
5.1 Uraniumhexafluorideisabasicmaterialusedtoprepare
C787Specification for Uranium Hexafluoride for Enrich-
nuclearreactorfuel.Tobesuitableforthispurposethematerial
ment
must meet criteria for uranium content, isotopic composition
C859Terminology Relating to Nuclear Materials
and metallic impurities in Specification C787 and C996. This
practice results in the complete dissolution of the sample for
uranium and impurities analysis, and determination of isotopic
1
This practice is under the jurisdiction of ASTM Committee C26 on Nuclear
distributionbymassspectrometryasdescribedin,forexample,
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
Test Methods C761.
Test.
Current edition approved Feb. 1, 2019. Published February 2019. Originally
6. Apparatus
approved in 1996. Last previous edition approved in 2014 as C1346–08 (2014).
DOI: 10.1520/C1346-19.
6.1 Steam bath, in a hood, if optional step 10.2.13 is used.
2
Polychlorotrifluoroethylene P-10 tubes are widely accepted by the industry for
subsample collection and subsequent UF quality analyses or dispatch to the
6
6.2 Vacuum oven, if option 2 of 10.2.14 is used. The oven
customer. The procedure for subsample collection and dissolution can also be used
3
should be adjustable to 80°C at an absolute pressure of 3 ×10
for other types of subsample tubes, for example, P-20, P-80 or P-100, in that case
Pa.
the amount of water has to be adjusted to ensure complete hydrolisation of UF and
6
avoid excessive heat evolution.
6.3 Dewar flask, wide-mouth.
3
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
6.4 Vise, small lab-bench model or similar type of holder.
Standards volume information, refer to the standard’s Document Summary page on
15
the ASTM website. 6.5 Wrench, ⁄16 in.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1346 − 19
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such specifications are available. Other grades of reagents
may
...
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: C1346 − 08 (Reapproved 2014) C1346 − 19
Standard Practice for
1,2
Dissolution of UF from P-10 Tubes
6
This standard is issued under the fixed designation C1346; 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 practice covers the dissolution of UF from a P-10 tube to provide solutions for analysis.
6
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific safeguard and safety precaution statements, see Section 89.
1.4 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.
2. Referenced Documents
3
2.1 ASTM Standards:
C761 Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium
Hexafluoride
C787 Specification for Uranium Hexafluoride for Enrichment
C859 Terminology Relating to Nuclear Materials
235
C996 Specification for Uranium Hexafluoride Enriched to Less Than 5 % U
D1193 Specification for Reagent Water
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms relating to the nuclear fuel cycle, refer to Terminology C859.
4. Summary of Practice
4.1 UF samples intended for analysis are packaged in P-10 tubes to prevent sublimation and reaction with moisture in the air.
6
The P-10 tube assembly (Fig. 1) consists of a Polychlorotrifluoroethylene (PCTFE) tube containing the UF , a PCTFE gasket to
6
cover the tube’s opening, and a nut and plug (Monel or SS) to seal the gasket to the tube.
4.2 The UF tube is weighed, cooled in liquid nitrogen, and quickly opened and immersed in water for dissolution. The pieces
6
of the tube’s assembly are removed from the resulting solution, rinsed, dried, reassembled, and weighed. The solution is dried for
gravimetric conversion to U O , or diluted to an appropriate concentration for dispensing into aliquots for subsequent analysis.
3 8
5. Significance and Use
5.1 Uranium hexafluoride is a basic material used to prepare nuclear reactor fuel. To be suitable for this purpose the material
must meet criteria for uranium content, isotopic composition and metallic impurities in Specification C787 and C996. This practice
results in the complete dissolution of the sample for uranium and impurities analysis, and determination of isotopic distribution
by mass spectrometry as described in, for example, Test Methods C761.
1
This practice is under the jurisdiction of ASTM Committee C26 on Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of Test.
Current edition approved Jan. 1, 2014Feb. 1, 2019. Published February 2014February 2019. Originally approved in 1996. Last previous edition approved in 20082014
as C1346 – 08.C1346 – 08 (2014). DOI: 10.1520/C1346-08R14.10.1520/C1346-19.
2
Polychlorotrifluoroethylene P-10 tubes are widely accepted by the industry for subsample collection and subsequent UF quality analyses or dispatch to the customer.
6
The procedure for subsample collection and dissolution can also be used for other types of subsample tubes, for example, P-20, P-80 or P-100 , P-100, in that case the amount
of water has to be adjusted to ensure complete hydrolisation of UF and avoid excessive heat evolution.
6
3
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1346 − 19
FIG. 1 Example of a P-10 Sample Tube
6. Apparatus
6.1 Steam bath, in a hood, if optional step 9.2.1310.2.1
...
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