Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (9): 90601-090601.doi: 10.11889/j.0253-3219.2020.hjs.43.090601


Technical research on continuous irradiation of fission molybdenum target in MHWRR

Li DING,Aimin ZHANG Yi ZHANG,Jianxiao ZHEN,Yanyan GE   

  1. China Institute of Atomic Energy, Beijing 102413, China
  • Received:2020-03-14 Revised:2020-05-31 Online:2020-09-15 Published:2020-09-09
  • About author:DING Li, female, born in 1978, graduated from China Institute of Atomic Energy with a doctoral degree in 2012, focusing on reactor engineering experiments and application

Abstract: Background

In order to meet the growing demand for diagnostic radionuclide 99mTc in the world, the Algeria Birine Nuclear Research Center launched the upgrade scheme of the multi-purposes heavy water research reactor (MHWRR), and put forward the need to establish continuous irradiation capacity of fission molybdenum. Limited by the existing infrastructure of the reactor, it is difficult to realize the loading/unloading and safe transportation of the target at the non-shutdown state of the reactor due to the high nuclear heat of the irradiated target.


This study aims to explore technical solution for continuous irradiation of fission molybdenum target in MHWRR.


Based on the analysis and calculation of neutronic and thermal-hydraulic of the in-core targets, the thermal performance of the irradiated targets and the fission 99Mo yield during unloading after shutdown were calculated and analyzed. A technical solution that satisfied the yield requirements and production requirements of fission molybdenum was innovatively proposed by adopting short-period temporary shutdown. Implementation of the upgrading project was carried out after the proposal was accepted by the owner of MHWRR.

Results & Conclusions

The preliminary commissioning test results show that the theoretical values are in good agreement with the experimental values, indicating the irradiation scheme and process are reasonable and feasible.

Key words: MHWRR, Fission molybdenum, Target, Irradiation scheme

CLC Number: 

  • TL92+1.3