DETERMINATION OF PLUTONIUM CONCENTRATION AND DISTRIBUTION IN URANIUM-PLUTONIUM MIXED OXIDE FUEL BYnAUTORADIOGRAPHY AND MICRODENSITOMETRY

摘要

The plutomum concentration and the homogeneity of the uranium-plutomum oxides, carbides and nitrides has been determined by microdensitometric analysis of autoradiographs of the examined radioactive material The method is based on the fact that the blackening of a film is proportional to the con¬centration of the radiation emitted from the material Correct measurements require the use of a reference material and standard curves which are independent of parameters such as exposure time of the film to the a radiations, the devel¬opment time, inhomogeneities of the film and errors caused by wrong utilization of the microdensitometer.