ASTM C1295-15

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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 − 14 C1295 − 15
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 and decay products in uranium hexafluoride
(UF ) and uranyl nitrate solution. This test method may also be used to measure the concentration of some uranium decay products.
6
It is intended to provide a method for demonstrating compliance with UF specifications C787 and C996, uranyl nitrate
6
specification C788, and uranium ore concentrate specification C967.
1.2 The lower limit of detection is 5000 MeV Bq/kg (MeV/kg 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 detector efficiency and background.
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.
231
Among 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. 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 health practices and determine the applicability of regulatory
limitations prior to use.
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
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
E181 Test Methods for Detector Calibration and Analysis of Radionuclides
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 determine the identity and activity of the gamma-ray-emitting radioactive fission and decay products. The number
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 15, 2014June 1, 2015. Published July 2014July 2015. Originally approved in 1995. Last previous edition approved in 20132014 as
C1295 – 13.C1295 – 14. DOI: 10.1520/C1295-14.10.1520/C1295-15.
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
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C1295 − 15
of counts recorded from one or more of the peaks identified with each fission nuclide is converted to disintegrations of that nuclide
per second (Bq). The gamma-ray energy for a fission nuclide is calculated by multiplying the number of disintegrations per second
of the nuclide by the mean gamma-ray energy emission rate of the nuclide. The calculated gamma-ray energy emission rates for
all observed fission nuclides are summed, then divided by the mass of the uranium in the sample to calculate the overall rate of
gamma energy pr
...

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: C1295 − 15
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 2. Referenced Documents
2
1.1 This test method covers the measurement of gamma 2.1 ASTM Standards:
energy emitted from fission products in uranium hexafluoride C761 Test Methods for Chemical, Mass Spectrometric,
(UF ) and uranyl nitrate solution. This test method may also be Spectrochemical, Nuclear, and Radiochemical Analysis of
6
used to measure the concentration of some uranium decay Uranium Hexafluoride
products. It is intended to provide a method for demonstrating C787 Specification for Uranium Hexafluoride for Enrich-
compliance with UF specifications C787 and C996, uranyl ment
6
nitrate specification C788, and uranium ore concentrate speci- C788 Specification for Nuclear-Grade Uranyl Nitrate Solu-
fication C967. tion or Crystals
C859 Terminology Relating to Nuclear Materials
1.2 The lower limit of detection is 5000 MeV Bq/kg
C967 Specification for Uranium Ore Concentrate
(MeV/kg per second) of uranium and is the square root of the
C996 Specification for Uranium Hexafluoride Enriched to
sum of the squares of the individual reporting limits of the
235
Less Than 5 % U
nuclides to be measured. The limit of detection was determined
C1022 Test Methods for Chemical and Atomic Absorption
on a pure, aged natural uranium (ANU) solution. The value is
Analysis of Uranium-Ore Concentrate
dependent upon detector efficiency and background.
D3649 Practice for High-Resolution Gamma-Ray Spectrom-
106
1.3 The fission product nuclides to be measured are Ru/
etry of Water
106 103 137 144 144 141 95 95 125
Rh, Ru, Cs, Ce, Pr, Ce, Zr, Nb, and Sb.
E181 Test Methods for Detector Calibration and Analysis of
Among the uranium decay product nuclides that may be
Radionuclides
231
measured is Pa. Other gamma energy-emitting fission and
3. Terminology
uranium decay nuclides present in the spectrum at detectable
levels should be identified and quantified as required by the
3.1 Except as otherwise defined herein, definitions of terms
data quality objectives.
are as given in Terminology C859.
1.4 The values stated in SI units are to be regarded as
4. Summary of Test Method
standard. No other units of measurement are included in this
4.1 A solution of the uranium sample is counted on a
standard.
high-resolution gamma-ray spectrometry system. The resulting
1.5 This standard does not purport to address all of the
spectrum is analyzed to determine the identity and activity of
safety concerns, if any, associated with its use. It is the
the gamma-ray-emitting radioactive fission and decay prod-
responsibility of the user of this standard to establish appro-
ucts. The number of counts recorded from one or more of the
priate safety and health practices and determine the applica-
peaks identified with each fission nuclide is converted to
bility of regulatory limitations prior to use.
disintegrations of that nuclide per second (Bq). The gamma-ray
energy for a fission nuclide is calculated by multiplying the
number of disintegrations per second of the nuclide by the
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 June 1, 2015. Published July 2015. Originally approved contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in 1995. Last previous edition approved in 2014 as C1295 – 14. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
C1295-15. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1295 − 15
mean gamma-ray energy emission rate of the nuclide. The 7. Calibration and Standardization of Detector
calculated gamma-ray energy emission rates for all observed
7.1 Prepare a mixed radionuclide calibration standard stock
fission nuclides are summed, then divided by the mass of the
solution covering the energy range of approximately 50 to
uranium in the sample to calculate the overall rate of gamma
2000 keV.
energy production in units of million electron volts per second
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7.1.1 Commercial calibration standards are available which
per kilogram of urani
...