Application of vacuum hot Helium leak testing technology for ITER project
-
摘要: 包层屏蔽块是国际热核聚变实验堆（ITER）项目的重要组成部件。每个屏蔽块都需要进行真空热氦检漏，以确保其密封性能。提出了一种利用真空热氦检漏系统进行高灵敏度检测的方法，该系统可以使包层屏蔽块去除自身的杂质气体来规避干扰，并通过提高环境温度和屏蔽块内部和外部之间压力差的方式来提高氦原子的活性以提高检测灵敏度。该方法可在检测环境温度为250℃，环境压力为1×10-5 Pa，产品内部氦气压力为4 MPa的条件下，实现系统灵敏度为10-11 Pa·m3·s-1数量级的氦气泄漏检测。试验结果表明，该技术具有高自动化和数据可追溯的优点，可避免产品自身释放的杂质气体带来的影响，对细微泄漏具有较高的检测灵敏度。Abstract: The blanket shield blocks is an important part of the International Thermonuclear Experimental Reactor (ITER). In order to ensure its sealing performance, each shield block needs to be taken a vacuum hot Helium leak testing. A method for high-sensitivity examination using a vacuum thermal helium leak test system was proposed in this paper. The shield blocks can remove its own impurity gas to avoid interference and increase the activity of Helium atoms by increasing the environment temperature. The examination sensitivity was improved by increasing the pressure difference between the inside and outside of the shield block. The sensitivity of this method can realize the helium leak test with the system sensitivity of 10-11 Pa ·m3 ·s-1 orders of magnitude under the conditions of examination environment temperature of 250℃, ambient pressure of 1×10-5 Pa, and products internal helium pressure of 4 MPa.The results indicated that the technology hada high degree of automation and data traceability, which can avoid the influence of the product's own outgassing on the examination, and had high sensitivity to the examination of subtle air leakage.
-
Keywords:
- ITER /
- vacuum /
- hot helium leak testing /
- out gassing /
- blanket shield block
-
-
[1] 冯开明.可控核聚变与国际热核实验堆(ITER)计划[J].中国核电, 2009, 2(3):212-219. [2] 谌继明.全球首台!中核成功研制人造太阳真空室内部件热氦检漏设备[J].中国机电工业, 2018(4):27. [3] 董猛, 冯焱, 成永军, 等.材料在真空环境下放气的测试技术研究[J].真空与低温, 2014, 20(1):46-51. [4] 李得天, 陈旭, 于红燕, 等.中国真空计量发展概述[J].真空与低温, 2004, 10(1):6-16. [5] 赵澜, 张涤新, 郭美如, 等.渗氦型真空漏孔漏率的温度修正[J].真空与低温, 2007, 13(2):90-93, 110. [6] 蔡泽波, 方仁俊, 李选, 等.ITER屏蔽包层模块热态真空室高温氦检漏[C]//2018远东无损检测新技术论坛论文集.厦门:远东无损检测新技术论坛, 2018. [7] 颉延风, 田培红, 唐芳群, 等.HL-2A托卡马克真空烘烤除气性能研究[J].真空, 2015, 52(1):48-52. [8] 肖立波.超灵敏检漏系统的性能测试与实时校准[D].北京:清华大学, 2005.
计量
- 文章访问数: 13
- HTML全文浏览量: 1
- PDF下载量: 12
下载:
