60.60 Standard published Nov 25, 2022
ISO
ISO/TC 85/SC 5 Nuclear installations, processes and technologies
International Standard
27.120.30 Fissile materials and nuclear fuel technology
Published
This document describes an analytical method for the determination of uranium in samples from pure product materials such as U metal, UO2, UO3, U3O8, uranyl nitrate hexahydrate and uranium hexafluoride from the nuclear fuel cycle. This procedure is sufficiently accurate and precise to be used for nuclear materials accountability. This method can be used directly for the analysis of most uranium and uranium oxide nuclear reactor fuels, either irradiated or un-irradiated, and of uranium nitrate product solutions. Fission products equivalent to up to 10 % burn-up of heavy atoms do not interfere, and other elements which could cause interference are not normally present in sufficient quantity to affect the result significantly. The method recommends that an aliquot of sample is weighed and that a mass titration is used, in order to obtain improved precision and accuracy. This does not preclude the use of alternative techniques which could give equivalent performance. The use of automatic device(s) in the performance of some critical steps of the method has some advantages, mainly in the case of routine analysis.
This method does not generate a toxic mixed waste as does the potassium dichromate titration in ISO 7097-1.
WITHDRAWN
ISO 7097-2:2004
PUBLISHED
ISO 7097-2:2022
60.60
Standard published
Nov 25, 2022