Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (11): 110402-110402.doi: 10.11889/j.0253-3219.2018.hjs.41.110402


Reliability analysis of sealed D-T neutron tube based on FMEA

LI Yaqiu1, ZHU Jiawei1, SUN Qiang2, YANG Linsen2, ZHAN Qin3, LEI Baimao1   

  1. 1 The Fifth Electronics Research Institute of Ministry of Industry and Information Technology, Guangzhou 510610, China;
    2 Beijing Century Science & Technology Group, Beijing 100038, China;
    3 China Institute of Atomic Energy, Beijing 102413, China
  • Received:2018-08-07 Revised:2018-09-30 Online:2018-11-10 Published:2018-11-20
  • Supported by:
    Supported by the Ministry of Science and Technology of China (National Key R&D Program of China) (No.2017YFF0104203), the Science and Technology Planning Project of Guangdong Province, China (No.2017B090914003), and Natural Science Foundation of Guangdong Province, China (No.2018A030310019)

Abstract: [Background] Neutron tube is the core component of a controllable neutron generator. There are still some gaps in reliability and stability between domestic products and foreign commercial products.[Purpose] This study aims to obtain the key factors which affect the reliability level of domestic neutron tube.[Methods] Taking certain type of pre-absorbing target sealed D-T neutron tube as the research object, a failure mode and effects analysis (FMEA) based on risk priority number (RPN) method was performed. A reliability analysis was carried out based on the results of FMEA.[Results] All possible failure modes as well as the cause, effect, occurrence probability and the harm extent of failure at different levels of neutron tube product were obtained. The key factors affecting the reliability level of domestic neutron tube were found out. Base on the analysis, some improvement measures in design are suggested.[Conclusion] The reliability of ion sources and the target turns out to be the key factor of neutron tube's reliability. The abnormal ionization caused by cathode/anode short circuit and the loss of adsorptive helium gas capacity caused by target film oxidation are the most harmful failure modes for the neutron tube.

Key words: Neutron tube, Failure mode and effect analysis, Reliability analysis, Criticality analysis, Effect severity ranking

CLC Number: 

  • O571