Natural occurring radioactive material (NORM) is a special type of radioactive waste. It is produced from many industries, especially from petroleum and gas industries. Accumulation of NORM in these areas leads to hazard effects on the workers and on the environment. Storage is a necessary step in the management of NORM. Recent years, storage step is extended until the decision of the final destination of this waste. Two design forms are used to store the NORM waste; above-ground storage room, and under-ground bunkers. In the present study, human intrusion scenarios are studied for both storage designs. The results obtained illustrate that the total dose is equal to 4.48E-08 Sv in case of human intrusion above ground storage, and 2.67E-03 Sv in the under-ground bunkers of NORM. The doses calculations show that the storage above-ground is more safe than the storage under-ground bunkers in case of human intrusion scenario.