Abstract:
A measuring technique using two identical detectors has been studied for assay of the drums containing low density waste, mainly consisting of organic materials such as contaminated paper, rags, protective clothing, shoes, etc.
In order to develop the technique to measure the activity of the radioactive waste drums released during operation of Dalat Research Reactor, Dalat City, Vietnam, the experimental study are carried out to confirm the calculation results of the systematic errors and evaluate the performance of this technique in practice.In this paper, the results of uniform matrix and point source in different positions in the drum are presented. The results are also basic for establishment of measuring procedure for assay the radwaste drums.