Comparison exercise on activity determination of radioactive waste drums in Taiwan was performed.
Radioactive waste drums with uniform and non-uniform radioactivity distribution were prepared at NRSL.
Testing drums were measured by 7 laboratories using high resolution gamma-ray spectrometry.
En and Bi values were used as parameters to evaluate the comparison results.
Highest discrepancies were found for drums with the rod-shaped source located in the center of the drum.