-In this study the total atomic cross-section (σ a ), total electronic cross-section (σ e ), effective atomic number (Z eff ) and effective electron density (N eff ) of locally developed ilmenite-magnetite (I-M) concrete were calculated analytically for different photon energies from 1 keV to 20 MeV and compared with concretes of different densities and compositions. The effect of Z eff on the mass attenuation coefficient (μ/ρ, σ a , σ e ) is shown graphically. The values of σ a , σ e , Z eff and N eff of I-M concrete were found to be higher than those of the ordinary concretes and in some cases than those of heavy concretes, which proved I-M concrete's shielding effectiveness. The results of this study will provide some useful information for a shielding material database for practical shielding calculation.

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In a nuclear reactor, control rod is a very essential part and plays the elementary role in the reactor control during reactor start up, normal power operation, experimental research and shutdown. To perform all these operations safely, knowledge of differential and integral worth of the control rod is mandatory. In this study, the differential and integral worth curve of all control

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