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 Wysłany: Nie 22:40, 16 Sty 2011 Temat postu: stivali ugg _3256 Depleted uranium material for in |
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Depleted uranium material for industrial applications
Special processing and the ultimate strength after heat treatment up to 1500MPa. Network structure of composite armor using depleted uranium, depleted uranium alloy frames are made of mesh, mesh between the depleted uranium alloy was added to prevent oxidation of materials,[link widoczny dla zalogowanych], which would both reduce the quality of the tank,[link widoczny dla zalogowanych], but also to obtain a better matching performance of material. Honeycomb structure of the lateral energy absorption by adding material to absorb the kinetic energy penetrator, to reduce the damage on the armor. Installation of depleted uranium armor M1A1 tank is the front part of the site and the turret,[link widoczny dla zalogowanych], increased armor installed after this depleted uranium, M1A1 tanks and increases quality from 57154kg 58968kg, but much higher tank defense force capable of simultaneously playing defense and chemical kinetic energy projectile attack. 2 depleted uranium material in other industrial application of foreign non-military industry is to create the largest amount of depleted uranium into the spent fuel and high level radioactive waste transport containers and shielding container. Because depleted uranium has a density, neutron capture cross section of large, high melting point, radiation stability, good thermal conductivity, low cost, easy processing and a series of advantages, especially for x-ray absorption coefficient and strong, is an excellent shielding materials . Source using depleted uranium tank protection made from quality sources of lead only 30% of the tank, especially suitable for making strong need to shield, and placed where small shielding container, and the role of depleted uranium shielding container for a long life expectancy. In addition to shielding material, depleted uranium alloy is also used as aircraft, ships with weights, propylene and acrylonitrile catalyst for ammonia synthesis, high-performance gyro rotor, the inertia flywheel, steel smelting and glazed ceramic industry additives. 3, the radiation of depleted uranium material of various isotopes of uranium are radioactive, the radiation which UTM strongest natural uranium content in the u, though small, but the radiation is almost half of the total radiation, depleted uranium in the u, u decreases, radiation from natural uranium 25900Bq / g reduced 14800Bq / g,[link widoczny dla zalogowanych], but there is no essential decrease of depleted uranium radiation energy is mainly contributed by the u Zhen. 3 kinds of radioactive isotopes of uranium are radiators, u Zhen t3-ray release of the decay of uranium in the process when exposed to uranium, t3-ray as radiation sources. And t3 poor penetration of radiation can not penetrate the folder commoner, plexiglass, aluminum foil, thick paint and metal plating and so on. Uranium metal has a toxic heavy metals'', but lower than arsenic, mercury and lead. Human digestive system gastrointestinal absorption of uranium in the low rate of about 1% of soluble uranium, the uranium is essentially insoluble is not absorbed. Into the blood in the body of uranium and oxygen organic acids, amino acids and complex anion complex, the reduction of uranium and the combination of proteins and enzymes to reduce the toxicity of uranium. Only long-term uranium contamination and the serious work was neglected under the conditions of industrial technology security personnel long-term radiation reaction will occur. In the process of uranium exposure, industrial hygiene practices and strict compliance with radiation protection requirements, operator safety can be guaranteed. However, application of depleted uranium in combat long-term impacts on the environment. Depleted uranium in high-speed impact generated when the missile body temperature can occur dusting, of which 10% to 35% (a high-up to 7O%) can be converted into oxide aerosols. These fine particles in the air flows around the basin, removal of the radioactive material to the people has caused great difficulties. Zhen-long half-life because u 4.5 billion years, scattered in the environment can be long-term effects u Zhen environment and human food chain, so that inhaled by humans because of contaminated air and eating contaminated food on human radiation dose received. And over time, due to the increasing content of the decay daughters, the radiation effects will gradually become larger. International Commission on Radiological Protection (ICRP) shows the ratio of uranium-238 dose of a factor 0.4Sv / g (inhalation) and 0.08mSv / g cannibalism), so the most important exposure pathway is inhalation of dust of uranium contamination . References [1】 = ~ Jul letter, Xie Pu. Talking about depleted uranium. Daily l ~ 2OOl, 01,17 (3) [2】 Wang Tiefu, Zhaoguo Hu, Ruan Wenjun, et al. DU liner material trace impurities on the performance of Jet. High Pressure Physics 【J], 1996,10 (2) [3】 Wang Tiefu, Ruan Wenjun. Carbon content of depleted uranium in its Jet performance. Science Bulletin 【J], 1997,42 (7) [4】 Wang Tiefu, Ruan Wenjun, Zhu Herong, et al. DU liner and Jet, and the impact 【J], 1995,15 (2) :180-184 [5】 WHOinformation, FactSheetN257. DepletedUraniumGeneva, 2001. [6】 in water, Zou Xiaoying,[link widoczny dla zalogowanych], Zhao, et al. Physical and chemical properties of depleted uranium aerosols of Radiological Medicine and Protection [J】, 2003,23 (5) :317-319
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