Abstract :
The present calculation covers the building shield during irradiation process and under water storage of three million curries Cobalt-60 radiation source. The calculation results in a design requirement of 8 m depth of water in the source storage pool so that the dose rate on water surface will be 2.8458x10^-15 Sv/hr, and the Dose rate on the surface of reinforced concrete of 1.70 m thick wi 11 be 2.42040x10^-8 Sv/hr as a maximum and of 1.90 m thick will be 6.6453x10^-10 Sv hr as the minimum on the outer surface of the irradiation room building. The entrance doors need to be manufactured of lead of 0.10 m thick so that the maximum dose rate will be 1.3105x 10^-7 Sv/hr and of 0.25 m so that (he minimum dose rate will be 8.2307x10^-12 Sv/hr on the outer surface of lead door.
