Standard Swedish standard · SS-ISO 12795:2011

Nuclear fuel technology - Uranium dioxide powder and pellets - Determination of uranium and oxygen/uranium ratio by gravimetric method with impurity correction (ISO 12795:2004, IDT)

Status: Valid

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Standard Swedish standard · SS-ISO 12795:2011

Nuclear fuel technology - Uranium dioxide powder and pellets - Determination of uranium and oxygen/uranium ratio by gravimetric method with impurity correction (ISO 12795:2004, IDT)
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Scope
This International Standard 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. This International Standard is used for the determination of the U mass fraction and the O/U-ratio of nuclear grade uranium dioxide. The precision and accuracy stated in 8.2 are valid, if the total amount of impurities in the sample does not exceed the figures given in 8.2. 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 µg 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 µg per gram of sample, the overall precision of the method depends on the accuracy of these impurity measurements. If no impurity correction is made and if the enrichment of the sample is not considered as described in 8.11, the precision and accuracy figures will be poorer than in 8.2.

Subjects

Fissile materials (27.120.30)


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Standard Swedish standard · SS-ISO 12795:2011

Nuclear fuel technology - Uranium dioxide powder and pellets - Determination of uranium and oxygen/uranium ratio by gravimetric method with impurity correction (ISO 12795:2004, IDT)
Subscribe on standards - Read more Dölj
Price: 735 SEK
standard ikon pdf

PDF

Price: 735 SEK
standard ikon

Paper

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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-80639

Edition: 1

Approved: 6/14/2011

No of pages: 20