Journal of Radiation Research and Radiation Proces ›› 2014, Vol. 32 ›› Issue (5): 10-050701.doi: 10.11889/j.1000-3436.2014.rrj.32.050701

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Investigation on thermal stability of Gaomiaozi bentonite using electron bean irradiation and high temperature aging technique

LIU Wei  LIANG Dong  ZHAO Shuaiwei  YANG Zhongtian  LIU Jianqin  LI Honghui  WAN Lei   

  1. (Key Laboratory on Geological Disposal of High-level Radioactive Waste of China National Nuclear Corparation;
    China Institute for Radiation Protection, Taiyuan 030006, China)
  • Received:2014-04-22 Revised:2014-06-03 Online:2014-10-20 Published:2014-09-04

Abstract:

In order to study the long-term stability, natural Gaomiaozi(GMZ) Ca-bentonite and its modified Na-bentonite samples, which suffered different doses of electron beam irradiation or different temperatures and thermal aging time, were analyzed using thermogravimetry-differential scanning calorimetry(TG-DSC). The results show that variations of the peak temperature and initial temperature induced by high temperature aging are larger than those induced by electron bean irradiation. GMZ Na-bentonite performs better in withstanding the electron bean irradiation and high temperature aging than that of the natural Ca-bentonite. The long-term thermal stability of Na-bentonite is better than that of Ca-bentonite under electron irradiation/high temperature aging.

Key words: Bentonite, Thermal stability, Electron bean irradiation, High temperature aging, TG-DSC analysis

CLC Number: 

  • TL99