导体间，导体与外壳间要绝缘； Insulation between conductors, and between conductor and containment.

导体与端板的绝缘，密封是电气贯穿件的“技术核心”； Insulation between the conductor and the end plates; and sealing is the the “ Technical Core“ of EPA
工作电压Operating Voltage，V
额定电流Rated Current，A 气体泄漏率 Pa· m3/s Leakage
380AC
400
200AC/48DC
3.5 <1×10-4 20
rate， <1×10-4 1
芯数Number of Cores
密封方式Sealing Method
陶瓷组件封焊Closure welding by using ceramic components
电气贯穿件的功能 Functions of EPA






压力边界内、外侧间的电气连通； Electrical connection between the inside and outside of the pressure boundary 满足电流、电压、电阻阻抗及屏蔽等电气要求； Meet the electrical requirements of the current, voltage, resistance impedance and shield 各路导体之间及导体对地的绝缘； Insulation between the conductors and between the conductor and ground 压力边界的承压能力； Pressure resistance of the pressure boundary 气体泄漏率的限制； Gas leak rate limit 不加其它装置即能经常地监测气体泄漏率； Be able to regularly monitor the gas leakage rate without adding other devices. 对事故的应对。 Respond to accident.
HTR-10电气贯穿件技术特点 HTR-10 EPA Technical Features
使用环境 Application Environment 一侧是高温高压高辐射的纯氦气；另一侧是高温空气； One side is pure helium with high temperature, high radiation and pressure, while the other side is high temperature air 密封介质为氦气； The sealant is helium 介质压力为3MPa； The media pressure is 3MPa. 结构紧凑：压力壳钢制，壳薄；贯穿件短、直径较小。 Compact structure: the containment is made of steel, with thin shell; and the EPA is short with small diameter.
HTR-10电气贯穿件技术特点 HTR-10 EPA Technical Features 技术参数Technical Index（1）
型号 Type 低压动力型Low-voltage power type 用处Application 主氦风机电机Main helium blower motor 工 作 温 度 Operating Temperature ， 100~150 ℃ 工作压力Operating Pressure， 3.0 Mpa 设计压力Design Pressure，MPa 3.5 仪表控制型Instrument control type 主氦风机仪表控制Main helium blower motor instrument control 100~150 3.;1×10-4 7
芯数Number of Cores
密封方式Sealing Method
陶瓷组件封焊Closure 陶瓷组件封焊Closure welding by using the welding by using the ceramic ceramic components components
leakage rate through changes in helium pressure. ρ Pa m3 / s (considering the influence of
leakage rate
钢管聚砜旋锻密封结构 Sealing Structure of Steel Tube Swaging Polysulfone
陶瓷组件封焊密封结构
Seal welded sealing Structure of Ceramic Components
陶瓷贯穿件的焊接安装 Welding Installation of Ceramic Penetration

电气贯穿件内外电缆接线：大电流用接线鼻子，小电流用插接。 Internal and External cable connection of EPA: use butt splices for high current, and use plug in connector for low current
引言 Foreword


高温气冷堆的转动设备采用覆盖式结构，避免了复杂的穿轴动密封 问题，增加了一回路边界电气贯穿件的难度; The HTR adopts rotation devices of overlay structure to avoid the complex seal problem, which increases the difficulty of primary circuit EPA. 电气贯穿件要求能随时监测气体泄漏率。 EPA is required to monitor the gas leakage rate at all times.
两套带密封结构的端板与承压管间组成密闭腔体； A closed cavity formed between two sets of end plates of sealing structure and pressure pipe. 在密闭腔体上焊出一根测泄管； Weld out a measured vent tube from a closed cavity

承压管能承受外压——一回路侧的压力；测量泄漏率而充气时的内
压。 Pressure pipe can withstand the external pressure - side pressure
of one circuit; internal pressure while in aeration to measure

测泄管末端装压力表和充气阀；
Install pressure gauge and inflation valve on the end of measured vent tube

密闭腔体内充稍低于工作压力的氦气，氦气压力的变化可得出气体泄漏率ρ, Pa•m3/s（考虑温度的影 响）。 Fill helium gas into the closed cavity to be slightly lower than the working pressure, ang get the gas
结构——压力边界 Structure - Pressure Boundary

电气贯穿件的承压管上有一个突缘，安装时突缘焊接在设备焊接短 管上； A flange is on the pressure tube of EPA, and is to be welded into welding equipment short pipe
使用环境 Environmental Conditions; 技术参数 Technical Parameters
3 结构 Structure
总体结构 overall structure; 密封结构 sealing structure; 气体泄漏监测 leakage detection
4 试验 Test
钢管聚砜旋 锻 密封Sealed by steel pipe the polysulfone swaging
HTR-10电气贯穿件技术特点 HTR-10 EPA Technical Features 技术参数Technical Index（2）
型号 Type 用处Application 低压动力型Low-voltage 仪表控制型Instrumental Control Type power model 燃料球传动Fuel balls 控制棒、吸收球 传 动 Transmission transmission control rods and absorbtion balls Operating 100~150 100~150 3.0 3.5 3.0 3.5 of
HTR-10 高温气冷堆一回路电气贯穿件 Primary circuit EPA of HTR-10
清华大学核能技术设计研究院 INET, Tsinghua University 周惠忠 Professor ZHOU Huizhong 15th January, 2013
内容 Content
0 引言 Foreword 1 电气贯穿件的功能 Functions of EPA 2 HTR-10电气贯穿件技术特点 Technical Features of HTR-10 EPA
设备焊接短管Equipment Welding Short Pipe
承压管Pressure Pipe