| 1. | Uranium is chemically active , which is extremely corroded in many environments
金属铀具有高化学活性，在许多环境中极易发生氧化腐蚀。 |
| 2. | Standard guide for pyrophoricity combustibility testing in support of pyrophoricity analyses of metallic uranium spent nuclear fuel
通过对燃烧核燃料的金属铀的自燃分析进行自燃易燃性试验的标准指南 |
| 3. | But he says nuclear power is not a long - term solution for china ' s energy needs because the world ' s uranium stores are limited and it is difficult to properly dispose of nuclear waste
但是他说，核能对中国来说并不是一个长远的解决办法，因为全世界金属铀的储藏量有限，而且如何妥善处理核废料也是一个难题。 |
| 4. | Russia and the european union have joined the united states in condemning iran ' s nuclear program , one day after tehran said it had succeeded in enriching uranium to a level used in nuclear power plants
在德黑兰说已经成功把金属铀提炼到可以用来进行核能发电的水平一天后，俄罗斯和欧盟加入美国的行列，共同谴责伊朗的核计划。 |
| 5. | The structure of triuranuim octaoxide ( u3o8 ) and the oxidation of uranium metal were studied by x - ray diffraction ( xrd ) and rietveld method in different partial pressure of oxygen and temperatures
本论文利用x射线衍射( xrd )并结合rietveld方法较系统地对金属铀和八氧化三铀( u _ 3o _ 8 )在不同温度、压力条件下的表层氧化情况和结构变化进行了分析研究。 |
| 6. | The thinner uranium foil is better for neutron measurement , so the standards is designed to be made into thin disc ( thickness 1mm and diameter 40mm ) and will be combined with matrix properly to simulate the item which to be measured
根据中子测量的经验，认为做成片状较好，且铀层的厚度越薄越好，但现在所具备的制作金属铀片的条件最薄只能做到1mm厚。 |
| 7. | The lattice parameter , a0 , and fwhm of the uo2 + x ( fluorite type ) decrease initially and stabilize later as the increasing of reaction times at 200 . the uo2 + x is progressively replaced by u3o8 as the oxidation proceeds at 300
200条件下，金属铀表层所形成的氟化钙结构的uo _ ( 2 + x )的点阵参数a _ 0和fwhm随着氧化时间的增加逐渐减小，然后出现稳定。 |
| 8. | Experts say a disagreement over whether north korea pursued a secret uranium enrichment program is the main reason pyongyang has failed to produce a complete nuclear declaration it promised to deliver by the end of last year
专家说，在北韩是否从事金属铀浓缩的秘密项目问题上意见分歧，导致平壤至今尚未交出核项目的完整清单，北韩原来承诺在去年年底前交出这份清单。 |
| 9. | The results indicate that the kinetic expression for the formation of uo2 + x in 25 - 150 was initially nonlinear , but switched to linear at long reaction times , that is , there exist two stages in the uo2 growth kinetics : nonlinear portion and linear portion
室温150下的氧化动力学曲线表明：金属铀表层氧化形成uo _ ( 2 + x )的过程中存在一个转折点，转折点前后形成两个反应阶段：非线性增长阶段和线性增长阶段。 |
| 10. | We consider the reaction product of treated uranium surface is mainly composed of uo2 , uc ( or ucxoy ) and free carbon . it may be the mainly reason for surface layer containing uc ( or ucxoy ) to improve corrosion resistance . at the same time the change of gibbs free energies of reaction product of supercritical carbon dioxide with uranium has been computed
通过aes分析知co _ 2长时间处理金属铀后其表面膜层中确实引入了一定量的碳，同时对高碳铀和低碳铀抗腐蚀性能的对比可说明金属铀表面膜层中碳的存在形式对铀试样抗腐蚀性能有很大的影响。 |
