ASTM C1295-24
(Test Method)Standard Test Method for Gamma Energy Emission from Fission and Decay Products in Uranium Hexafluoride and Uranyl Nitrate Solution
Standard Test Method for Gamma Energy Emission from Fission and Decay Products in Uranium Hexafluoride and Uranyl Nitrate Solution
SIGNIFICANCE AND USE
5.1 Specific gamma-ray emitting radionuclides in UF6 are identified and quantified using a high-resolution gamma-ray energy analysis system, which includes a high-resolution germanium detector. This test method shall be used to meet the health and safety specifications of C787, C788, and C996 regarding applicable fission products in reprocessed uranium solutions. This test method may also be used to provide information to parties such as conversion facilities on the level of uranium decay products in such materials. Pa-231 is a specific uranium decay product that may be present in uranium ore concentrate and is amenable to analysis by gamma spectrometry.
SCOPE
1.1 This test method covers the measurement of gamma energy emitted from fission products in uranium hexafluoride (UF6) and uranyl nitrate solution. This test method may also be used to measure the concentration of some uranium decay products. It is intended to provide a method for demonstrating compliance with UF6 Specifications C787 and C996, uranyl nitrate Specification C788, and uranium ore concentrate Specification C967.
1.2 The lower limit of detection is estimated at 5000 MeV Bq/kg (MeV kg-1/s-1) of uranium and is the square root of the sum of the squares of the individual reporting limits of the nuclides to be measured. The limit of detection was determined on a pure, aged natural uranium (ANU) solution. The value is dependent upon the detector efficiency and background that can be achieved.
1.3 The fission product nuclides to be measured are 106Ru/106Rh, 103Ru, 137Cs, 144Ce, 144Pr, 141Ce, 95Zr, 95Nb, and 125Sb. Among the uranium decay product nuclides that may be measured is 231Pa. Other gamma energy-emitting fission and uranium decay nuclides present in the spectrum at detectable levels should be identified and quantified as required by the data quality objectives.
1.4 The values stated in SI units are to be regarded as standard. Additionally, the non-SI units of kiloelectron volts and megaelectron volts are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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.
1.6 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: C1295 − 24
Standard Test Method for
Gamma Energy Emission from Fission and Decay Products
1
in Uranium Hexafluoride and Uranyl Nitrate Solution
This standard is issued under the fixed designation C1295; 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 Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This test method covers the measurement of gamma
Barriers to Trade (TBT) Committee.
energy emitted from fission products in uranium hexafluoride
(UF ) and uranyl nitrate solution. This test method may also be
6
2. Referenced Documents
used to measure the concentration of some uranium decay
2
2.1 ASTM Standards:
products. It is intended to provide a method for demonstrating
C761 Test Methods for Chemical, Mass Spectrometric,
compliance with UF Specifications C787 and C996, uranyl
6
Spectrochemical, Nuclear, and Radiochemical Analysis of
nitrate Specification C788, and uranium ore concentrate Speci-
Uranium Hexafluoride
fication C967.
C787 Specification for Uranium Hexafluoride for Enrich-
1.2 The lower limit of detection is estimated at 5000 MeV
ment
-1 -1
Bq/kg (MeV kg /s ) of uranium and is the square root of the
C788 Specification for Nuclear-Grade Uranyl Nitrate Solu-
sum of the squares of the individual reporting limits of the
tion or Crystals
nuclides to be measured. The limit of detection was determined
C859 Terminology Relating to Nuclear Materials
on a pure, aged natural uranium (ANU) solution. The value is
C967 Specification for Uranium Ore Concentrate
dependent upon the detector efficiency and background that
C996 Specification for Uranium Hexafluoride Enriched to
can be achieved. 235
Less Than 5 % U
106
1.3 The fission product nuclides to be measured are Ru/ C1022 Test Methods for Chemical and Atomic Absorption
106 103 137 144 144 141 95 95 125
Rh, Ru, Cs, Ce, Pr, Ce, Zr, Nb, and Sb. Analysis of Uranium-Ore Concentrate
Among the uranium decay product nuclides that may be D3649 Practice for High-Resolution Gamma-Ray Spectrom-
231
measured is Pa. Other gamma energy-emitting fission and etry of Water
uranium decay nuclides present in the spectrum at detectable
E3376 Practice for Calibration and Usage of Germanium
levels should be identified and quantified as required by the Detectors in Radiation Metrology for Reactor Dosimetry
data quality objectives.
3. Terminology
1.4 The values stated in SI units are to be regarded as
3.1 Except as otherwise defined herein, definitions of terms
standard. Additionally, the non-SI units of kiloelectron volts
are as given in Terminology C859.
and megaelectron volts are to be regarded as standard. No other
units of measurement are included in this standard.
4. Summary of Test Method
1.5 This standard does not purport to address all of the
4.1 A solution of the uranium sample is counted on a
safety concerns, if any, associated with its use. It is the
high-resolution gamma-ray spectrometry system. The resulting
responsibility of the user of this standard to establish appro-
spectrum is analyzed to determine the identity and activity of
priate safety, health, and environmental practices and deter-
the gamma-ray-emitting fission and decay products. The num-
mine the applicability of regulatory limitations prior to use.
ber of counts recorded from one or more of the peaks identified
1.6 This international standard was developed in accor-
with each fission nuclide is converted to disintegrations of that
dance with internationally recognized principles on standard-
nuclide per second (Bq). The gamma-ray energy for a fission
ization established in the Decision on Principles for the
nuclide is calculated by multiplying the number of disintegra-
tions per second of the nuclide by the mean gamma-ray energy
1
This test method is under the jurisdiction of ASTM Committee C26 on Nuclear
Fuel Cycle and is the direct responsibility of Subcommittee C26.05 on Methods of
2
Test. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 15, 2024. Published March 2024. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1995. Last previous edition approved in 2015 as C1295 – 15. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1295-24. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Con
...
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: C1295 − 15 C1295 − 24
Standard Test Method for
Gamma Energy Emission from Fission and Decay Products
1
in Uranium Hexafluoride and Uranyl Nitrate Solution
This standard is issued under the fixed designation C1295; 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 test method covers the measurement of gamma energy emitted from fission products in uranium hexafluoride (UF ) and
6
uranyl nitrate solution. This test method may also be used to measure the concentration of some uranium decay products. It is
intended to provide a method for demonstrating compliance with UF specificationsSpecifications C787 and C996, uranyl nitrate
6
specificationSpecification C788, and uranium ore concentrate specificationSpecification C967.
-1 -1
1.2 The lower limit of detection is estimated at 5000 MeV Bq/kg (MeV/kg(MeV kg /s per second) ) of uranium and is the square
root of the sum of the squares of the individual reporting limits of the nuclides to be measured. The limit of detection was
determined on a pure, aged natural uranium (ANU) solution. The value is dependent upon the detector efficiency and
background.background that can be achieved.
106 106 103 137 144 144 141 95 95 125
1.3 The fission product nuclides to be measured are Ru/ Rh, Ru, Cs, Ce, Pr, Ce, Zr, Nb, and Sb. Among
231
the uranium decay product nuclides that may be measured is Pa. Other gamma energy-emitting fission and uranium decay
nuclides present in the spectrum at detectable levels should be identified and quantified as required by the data quality objectives.
1.4 The values stated in SI units are to be regarded as standard. Additionally, the non-SI units of kiloelectron volts and
megaelectron volts are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 healthsafety, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.
1.6 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
2
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
C788 Specification for Nuclear-Grade Uranyl Nitrate Solution or Crystals
1
This test method 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 June 1, 2015Jan. 15, 2024. Published July 2015March 2024. Originally approved in 1995. Last previous edition approved in 20142015 as
C1295 – 14.C1295 – 15. DOI: 10.1520/C1295-15.10.1520/C1295-24.
2
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 ----------------------
C1295 − 24
C859 Terminology Relating to Nuclear Materials
C967 Specification for Uranium Ore Concentrate
235
C996 Specification for Uranium Hexafluoride Enriched to Less Than 5 % U
C1022 Test Methods for Chemical and Atomic Absorption Analysis of Uranium-Ore Concentrate
D3649 Practice for High-Resolution Gamma-Ray Spectrometry of Water
E181E3376 GuidePractice for Detector Calibration and Analysis of Radionuclides Usage of Germanium Detectors in Radiation
Metrology for Reactor Dosimetry
3. Terminology
3.1 Except as otherwise defined herein, definitions of terms are as given in Terminology C859.
4. Summary of Test Method
4.1 A solution of the uranium sample is counted on a high-resolution gamma-ray spectrometry system. The resulting spectrum is
analyzed to de
...
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