The standards and system described in this article have been used in the Seraing LD Steel Plant of S. A. Cockerill-Ougree- Providence (Liege, Belgium). The results obtained are sufficiently reproducible to warrant their metallurgical use. In addition, the rapidity of the method has been amply demonstrated; the preparation of the specimen from the frusto-conical-shaped bomb sample can be effected within 35 sec using an automatic lathe. Irradiation and counting time are 5 and 30 sec respectively; the results are computed automatically. The results of activation analysis agree satisfactorily with these obtained by various carburizing fusion methods. The standardization of the system is very simple. The preparation of the oxygen standard poses no special problems. Correction for differences in geometry and in neutron and gamma ray absorption is more complicated but must only be carried out once.