1 Scope
This document describes an analytical method for the determination of uranium in samples
from pure product materials such as U metal, UO 2 , UO 3 , uranyl nitrate hexahydrate, uranium hexafluoride and U 3 O 8 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.