Influence of oxidation temperature and time and ZrO2 concertration on density, surface area and O/U ratio of (U3O8+ZrO2) reduction product. Reduction process of uranium oxide and zicronium oxide (U3O8+ZrO2) by hydrogen gas at temperature of 850 oC for 2 hours in reduction furnace has been carried out. The material was obtained from oxidation product of (UO2 + ZrO2) pellet became (U3O8+ZrO) powder at temperature of 400oC and 500oC for0.5 - 2 hours with variation of ZrO2 concentration from 0-0.6%....