EN ISO 21484:2019

Nuclear Energy - Fuel technology - Determination of the O/M ratio in MOX pellets by the gravimetric method (ISO 21484:2017)

Publication date:   Nov 14, 2019

General information

60.60 Standard published   Jun 12, 2019


CEN/TC 430 Nuclear energy, nuclear technologies, and radiological protection

European Norm

17.240   Radiation measurements | 27.120.30   Fissile materials and nuclear fuel technology



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ISO 21484:2017 describes a method for determining the Oxygen-to-Metal (O/M) ratio in mixed uranium-plutonium oxide (U,Pu)O2 ± X pellets. The parameters given in the following paragraphs are relevant for pellets within a range of O/M ratio corresponding to 1,98 to 2,01. The method described in the document is adapted, with regard to the parameters, if the expected values of O/M ratio are outside the range.

Life cycle


EN ISO 21484:2019
60.60 Standard published
Jun 12, 2019


Adopted from ISO 21484:2017 IDENTICAL