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natural uranium reactor 天然铀反应堆,天然铀堆
In this paper the natural uranium fuel Cycle and currently developed advanced CANDU fuel cycles in the near future are described. 介绍CANDU 堆的天然铀燃料循环以及最近开发的适合未来近期的先进燃料循环。
The CANDU core calculations show that the transition from the natural uranium (NU) to RU or SEU can be completed without any change of the reactor core structure and the operation mode. 通过对后处理回收铀(RU)、SEU堆芯物理特性的分析可知，在堆芯结构及运行方式不作重大改变的情况下，即可完成从NU到RU或SEU的过渡，因而这两种先进燃料循环策略具有重大的经济效益和吸引力。
Natural uranium heavy water reactor 天然铀重水反应堆
Th has been produced via a multinucleon transfer reaction by 60MeV/u 18 O ions bombardment of natural uranium. 利用 6 0MeV/u的18O离子束轰击天然铀靶 ,通过多核子转移反应生成重丰中子核素2 37Th ,由多步快速放射化学分离方法从被照射过的靶物质中分离出钍元素。
Because of the inherent flexibility of nuclear fuel cycle in CANDU reactor, the transition from the nature uranium to the recycled uranium(RU) can be completed without any changes of the structure of reactor core and operation mode. 由于CANDU堆对核燃料循环的固有灵活性 ,堆芯结构及运行方式不需作重大改变 ,即可完成从天然铀到RU的过渡。
The required permission or approval of the energy audit, including coal, oil, natural gas, nuclear power for electricity and natural uranium, and other outside projects. 按规定权限核准或者审核能源，包括煤炭、石油、天然气、电力和用于核发电的天然铀等境外的投资项目。
Squyres said this silicon forms near natural hot water sources or volcanic outlets, which give off natural gas. On Earth, living microbes are always found in such situations. 史凯尔表示，这种矽矿主要在靠近天然温热水源区或火山喷口处，这些地方都会冒出天然气。在地球，上述地区一定会发现微生物。
More and more people are building homes near natural vegetation and in wildlands, exposing themselves to the devastation that natural fire cycles can cause. 更多人的家重新建筑靠近自然植被和在荒野，遗弃他们担心破坏地区因为天然火灾的周期可能再现。
From preliminary evaluation and calculation, it was shown that MOXnuclear fuel consisting of depleted uranium enrichment tailings (0.25% 235U) andplutonium (their ratio 99.5%:0.5%) could replace natural uranium in CANDU reactorto sustain chain reaction. 经过初步验算，得出了用235U含量为0.;25%25的贫化铀浓缩残渣和钚组成MOX核燃料（其重量比为99
In this paper, nuclear fuel cycle issues, including the amount of natural uranium resource, separative work and nuclear fuel for PWR power plant, together with spent fuels, separated... 随着核电规模的扩大,核电站运行所需要的天然铀和产生的核废物都将增加。
In this paper, nuclear fuel cycle issues, including the amount of natural uranium resource, separative work and nuclear fuel for PWR power plant, together with spent fuels, separated. 为了保障我国核电的可持续发展,必须建设配套的核燃料循环设施。
The tumor was covered by a layer of thin bone and an aberrant tooth was found near nature orifice of maxillary sinus.The bony erosion of maxillary bone was also noted. 术中可见肿瘤外围被覆一层骨质薄膜，且上颌骨部份已被侵蚀破坏，而于上颌窦近开口处有一迷生齿。
near natural stream control assessment system 河溪近自然评价
His clinic is near the newly-built railway station. 他的诊所在新建的火车站附近。
It's dangerous to be so near to the tiger. 离老虎那么近是很危险的。
It is natural for a cat to catch mice. 猫捉老鼠是本能。
I was born in a small city near Guangzhou. 我出生在离广州不远的一个小城市。
The rug singed because it was too near the fire. 地毯太靠近壁炉已烤焦了。
The troops were entrenched near the mountains. 部队在群山边筑起壕沟以防卫自己。