HTR-10高溫氣冷堆一回路電氣貫穿件——清華大學核能技術設計研究院

1、HTR-10 高溫氣冷堆一回路電氣貫穿件高溫氣冷堆一回路電氣貫穿件Primary circuit EPA of HTR-10清華大學核能技術設計研究院INET, Tsinghua University周惠忠Professor ZHOU Huizhong15th January, 2013內容內容 Content0 引言 Foreword1 電氣貫穿件的功能 Functions of EPA2 HTR-10電氣貫穿件技術特點 Technical Features of HTR-10 EPA 使用環(huán)境 Environmental Conditions; 技術參數 Technical Paramet

2、ers3 結構 Structure 總體結構 overall structure; 密封結構 sealing structure; 氣體泄漏監(jiān)測 leakage detection4 試驗 Test 型式試驗實驗內容 Type test; 型式試驗方法 Test method; 產品試驗 Product test5 結論 Conclusion引言引言 Forewordn電氣貫穿件是防止反應堆的放射性氣體向環(huán)境泄漏而采取的必要而有效的方法之一； EPA is one of the necessary and effective methods to contain any radiation;

3、n電氣貫穿件既提供了電氣性能的貫穿，又保持了邊界的完整和防止泄漏； EPA does not only provide electrical feedthrough, but also maintain the integrity of the pressure boundery and prevent leakage; n安全殼的電氣貫穿件可看成核電站安全防護的最后屏障； EPA on the containment shell is regarded as the last protection of the nuclear power plant safety; 引言引言 Forewor

4、dn高溫氣冷堆的轉動設備采用覆蓋式結構，避免了復雜的穿軸動密封問題，增加了一回路邊界電氣貫穿件的難度; The HTR adopts rotation devices of overlay structure to avoid the complex seal problem, which increases the difficulty of primary circuit EPA. n電氣貫穿件要求能隨時監(jiān)測氣體泄漏率。 EPA is required to monitor the gas leakage rate at all times. 電氣貫穿件的功能電氣貫穿件的功能 Functi

5、ons of EPAn壓力邊界內、外側間的電氣連通； Electrical connection between the inside and outside of the pressure boundaryn滿足電流、電壓、電阻阻抗及屏蔽等電氣要求； Meet the electrical requirements of the current, voltage, resistance impedance and shieldn各路導體之間及導體對地的絕緣； Insulation between the conductors and between the conductor and gro

6、undn壓力邊界的承壓能力； Pressure resistance of the pressure boundaryn氣體泄漏率的限制； Gas leak rate limitn不加其它裝置即能經常地監(jiān)測氣體泄漏率； Be able to regularly monitor the gas leakage rate without adding other devices.n對事故的應對。 Respond to accident.HTR-10電氣貫穿件技術特點電氣貫穿件技術特點HTR-10 EPA Technical Features使用環(huán)境 Application Environmentn

7、一側是高溫高壓高輻射的純氦氣；另一側是高溫空氣； One side is pure helium with high temperature, high radiation and pressure, while the other side is high temperature airn密封介質為氦氣； The sealant is helium n介質壓力為3MPa； The media pressure is 3MPa.n結構緊湊：壓力殼鋼制，殼?。回灤┘?、直徑較小。 Compact structure: the containment is made of steel, with

8、thin shell; and the EPA is short with small diameter. HTR-10電氣貫穿件技術特點電氣貫穿件技術特點 HTR-10 EPA Technical Features技術參數Technical Index（1）型號 Type低壓動力型Low-voltage power type儀表控制型Instrument control type用處Application主氦風機電機Main helium blower motor主氦風機儀表控制Main helium blower motor instrument control工作溫度Operating

9、Temperature，100150100150工作壓力Operating Pressure，Mpa3.03.0設計壓力Design Pressure，MPa3.53.5工作電壓Operating Voltage，V380AC200AC/48DC額定電流Rated Current，A4003.5氣體泄漏率 Leakage rate，Pam3/s110-4110-4芯數Number of Cores120密封方式Sealing Method陶瓷組件封焊Closure welding by using the ceramic components鋼管聚砜旋鍛密封Sealed by steel pi

10、pe polysulfone swaging HTR-10電氣貫穿件技術特點電氣貫穿件技術特點HTR-10 EPA Technical Features技術參數Technical Index（2）型號 Type低壓動力型Low-voltage power model儀表控制型Instrumental Control Type用處Application燃 料 球 傳 動 F u e l b a l l s transmission控制棒、吸收球傳動Transmission of control rods and absorbtion balls工 作 溫 度 O p e r a t i n g

11、Temperature，100150100150工作壓力Operating Pressure，Mpa3.03.0設計壓力Design Pressure，Mpa3.53.5工作電壓Operating Voltage，V380AC380AC/48DC額定電流Rated Current，A104氣體泄漏率Gas Leakage Rate，Pam3/s110-4110-4芯數Number of Cores724密封方式Sealing Method陶 瓷 組 件 封 焊 C l o s u r e welding by using the ceramic components陶瓷組件封焊Closure

12、welding by using the ceramic components結構示意圖結構示意圖Structure Schematic Diagram結構結構電氣貫穿電氣貫穿Structure Electrical Penetrationn要求導體電阻小，用無氧銅制造； Require small resistance of the conductor, using oxygen-free copper for manufacturen導體間，導體與外殼間要絕緣； Insulation between conductors, and between conductor and contain

13、ment.n導體與端板的絕緣，密封是電氣貫穿件的“技術核心”； Insulation between the conductor and the end plates; and sealing is the the “ Technical Core“ of EPAn電氣貫穿件內外電纜接線：大電流用接線鼻子，小電流用插接。 Internal and External cable connection of EPA: use butt splices for high current, and use plug in connector for low current結構結構壓力邊界壓力邊界Str

14、ucture - Pressure Boundaryn電氣貫穿件的承壓管上有一個突緣，安裝時突緣焊接在設備焊接短管上； A flange is on the pressure tube of EPA, and is to be welded into welding equipment short pipen承壓管能承受外壓一回路側的壓力；測量泄漏率而充氣時的內壓。 Pressure pipe can withstand the external pressure - side pressure of one circuit; internal pressure while in aerati

15、on to measure leakage rate鋼管聚砜旋鍛密封結構鋼管聚砜旋鍛密封結構Sealing Structure of Steel Tube Swaging Polysulfone 陶瓷組件封焊密封結構陶瓷組件封焊密封結構Seal welded sealing Structure of Ceramic Components陶瓷貫穿件的焊接安裝陶瓷貫穿件的焊接安裝Welding Installation of Ceramic Penetration設備焊接短管Equipment Welding Short Pipe承壓管Pressure Pipe可伐件Kovar Piece陶瓷件C

16、eramic Piece導體Conductor結構結構氣體泄漏率監(jiān)測氣體泄漏率監(jiān)測Structure Monitoring of Gas Leakage Raten兩套帶密封結構的端板與承壓管間組成密閉腔體；nA closed cavity formed between two sets of end plates of sealing structure and pressure pipe.n在密閉腔體上焊出一根測泄管； Weld out a measured vent tube from a closed cavityn測泄管末端裝壓力表和充氣閥； Install pressure gau

17、ge and inflation valve on the end of measured vent tuben密閉腔體內充稍低于工作壓力的氦氣，氦氣壓力的變化可得出氣體泄漏率, Pam3/s（考慮溫度的影響）。 Fill helium gas into the closed cavity to be slightly lower than the working pressure, ang get the gas leakage rate through changes in helium pressure. Pa m3 / s (considering the influence of t

18、emperature). =V(P2-P1) V 氣體容積(Gas Volume)，m3； t 試驗時間(Time for the Test)，s。P1 開始試驗時的壓力(Pressure in beginning of the test)，MPa；P2 結束試驗時的壓力(Pressure in ending of the test)，MPa；試驗試驗 Testn型式試驗內容 Contents of Type Test氣壓試驗、氣體泄漏率試驗、介電強度試驗、絕緣電阻試驗、導體連續(xù)性試驗、額定持續(xù)電流試驗、短時過載電流試驗、動態(tài)穩(wěn)定電流試驗、地震試驗。n型式試驗方法 Air pressure t

19、est, gas leakage rate test, dielectric strength test, insulation resistance test, conductor continuity test, rated continuous current test, short-time overload current test, the dynamic stable current test, sesimic test.按照試驗大綱，按程序進行，有些項目要反復進行。例如總程序28個，氣體泄漏率試驗進行了6次，介電強度試驗和絕緣電阻試驗各進行了5次。Based on the te

20、st program, execute in accordance with the procedure, and some of the projects have to be repeated. For example, in 28 of the total programs, gas leakage rate test is done six times, and the dielectric strength test and insulation resistance test is done 5 times for each .地震試驗后樣機未見損壞、變形、泄漏。試驗中做了導體連續(xù)性試驗，試驗后還進行了一系列試驗。Nno damage, deformation, leakage on the sample equipment after earthquake test. Tests are also done on conductor continuity during the test, and a series of tests are also