International Standard
ISO 12795:2004
Nuclear fuel technology — Uranium dioxide powder and pellets — Determination of uranium and oxygen/uranium ratio by gravimetric method with impurity correction
Reference number
ISO 12795:2004
Edition 1
International Standard
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ISO 12795:2004
Published (Edition 1, 2004)
This standard was last reviewed and confirmed in 2013. Therefore this version remains current.

ISO 12795:2004

ISO 12795:2004
CHF 63
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ISO 12795:2004 specifies a method of determining the mass fraction of uranium and the oxygen-to-uranium atomic ratio in hyperstoichiometric uranium dioxide (UO2+X) powders and pellets.

ISO 12795:2004 is used for the determination of the U mass fraction and the O/U-ratio of nuclear grade uranium dioxide.

An impurity correction in the U mass fraction and the O/U-ratio determination should be performed, if the amount of total impurities in oxide form exceeds 1 500 micrograms per gram of sample. Lower impurity levels influence the O/U-ratio by less than 0,000 5 and can be neglected. The non-volatile impurities shall be determined by an appropriate technique, and the correction applied. If the total content of the non-volatile impurities in oxide form is greater than 1 500 micrograms per gram of sample, the overall precision of the method depends on the accuracy of these impurity measurements.

General information

  •  : Published
     : 2004-08
    : Close of review [90.60]
  •  : 1
     : 7
  • ISO/TC 85/SC 5
  • RSS updates

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