Abstract:
This research paper desired to illustrate the presence of naturally occurring radioactive minerals
concentration and the way how naturally occurring radioactive minerals were identified in Derba
and East cement and in their raw materials.
We were used HPGe detector to identify the presence of natural occurring radioactivity
concentration in Derba and East cement and in their raw materials, and applied appropriate
research methodology particularly experimental design were more preferable. The researcher
was collected samples from Derba and East cement factories stores by using judgmental
sampling techniques and prepared as a desirable manner. The selected sample was sealed for 4
weeks to reach secular equilibrium where the rate of decay of the daughters becomes equal to
that of the parent.
In this study the activity concentration ofU-238, Th-232 and K-40 was found in collected sample
was less than the worldwide average range recommended by UNSCEARR-2000.except in
pumice sample investigated from East cement factories. In addition to this; the results of
absorbed dose rate, annual effective dose equivalent, radium equivalent activity, external hazard
index and representative gamma index of the sample were much less as compared within
recommended international values by UNSCEAR-2000. The study shows that the Derba and
East cement samples and their raw materials analyzed do not pose any significant source of
radiation hazard and are safe for use in the construction of dwellings except in pumice which are
investigated from East cement factories.
