[en] The determination of trace amounts of rhodium in highly enriched uranium is described. The procedure utilizes 14 MeV neutron activation of rhodium through the reaction sup(103)Rh(n, 2n)sup(102m,g)Rh using the two long-lived isomers sup(102m)Rh (T = 1057 d) and sup(102g)Rh (T= 206 d) which are not formed as fission products. The irradiation is followed by a radiochemical separation of rhodium from uranium and the fission products. The described procedure has been used for the determination of the upper limits for the rhodium concentration in two highly enriched fuel grade uranium samples. (author)