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1)  Heavy water system
重水系统
1.
Heavy water heat exchanger is an important equipment of heavy water system in the two constructing research reactors.
板式换热器在重水系统中的应用对研究堆的设计具有一定的参考价值。
2.
In order to preventing water from commixing heavy water,the pipeline and equipments of the heavy water system must be dewatered before filling heavy water.
为彻底干燥反应堆重水系统管道和设备,解决阀门阀体底部蓄水、干燥设备吹扫死角等干燥试验技术难点,采用干空气吹扫与抽真空结合的干燥方法、加热干空气和设备局部加热等措施,通过监测系统出口处空气露点变化和系统整体保真空试验,准确测定并确保了系统干燥程度达到要求。
2)  underwater weighting system
水下称重系统
3)  Purification system for heavy water
重水净化系统
4)  heavy water concentration system
重水浓缩系统
1.
The function,the scheme and the flow design of heavy water concentration system and its characteristic for China Advanced Research Reactor are introduced in the paper.
文章涉及中国先进研究堆重水浓缩系统的功能、工艺方案和流程设计及系统设计的特点。
5)  gravity drainage system
重力排水系统
1.
Comparing siphon drainage system with gravity drainage system, the paper considers the siphon drainage system to possess many advantages such as small pipe dia, little installing space, non-sloped suspended pipe, short sewage connecting and underground pipe length etc.
屋面雨水排水采用虹吸排水系统较重力排水系统,具有管径小、所需管道安装空间小、悬吊管道无坡度、下水道连接管和埋地管少等优点。
2.
Compared with gravity drainage system, it has the advantages of small pipe diameter and installing space, non-sloped suspended pipe, less sewage connecting and underground pipes and etc.
与重力排水系统相比,具有管径小、管道安装要求空间小、悬吊管无坡度、下水道连接管和埋地管少等优点。
3.
The vacuum drainage system is adopted in reconstruction of a subway shopping centre due to the following reasons:poor air ventilation in the underground shopping centre;trying not to affect current constructions;and difficulties to set gravity drainage systems.
针对地下商场空气流动差、不能影响土建、设置重力排水系统困难等问题,在改造某地下地铁商城时采用了真空排水系统,这种卫生间排水方式既能给顾客出行带来方便,同时对地下商场空气环境的影响也较小,取得了不错的效果。
6)  Heavy water nuclear energy system
重水核能系统
补充资料:重水生产
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性质:氘的天然丰度仅为0.015%,生产时的原料处理量大,分离级数多,平衡时间长。生产成本主要取决于从天然丰度至1%左右的初浓阶段。现代工业生产的方法有:氨、水精馏及水、液氢蒸馏法,单温、双温氨-氢、氢-水、硫化氢-水交换法,间歇、半连续、连续电解法等。较多采用双温硫化氢-水交换法(GS法)。

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