Effects of Gamma Radiation on Cementitious Materials in Repository Environment - 16300
- Nuclear and Energy Research Institute (Brazil)
- Institut de Ciencia de Materials de Barcelona (Spain)
- Helmholtz-Zentrum Berlin fuer Materialien und Energie - HZB (Germany)
- Brazilian Synchrotron Light Source (Brazil)
Cementitious materials are widely used in the management of radioactive waste and have to perform as required for the period of service life of the installation. In order to assess the long term durability of cement paste in a deep borehole for radioactive wastes, specimens were cast in laboratory and exposed to a gamma radiation field. The effects of the radiation in the specimens were evaluated by X-Ray Diffraction, as changes observed in the mineralogy and microstructure of the material after irradiation doses varying between 0 (without radiation) and 10 MGy. It was observed that the specimens exposed to higher doses of gamma radiation (up to 3 MGy) presented differences between surface and core, when compared with the samples with no radiation or exposed to low doses. These results are important to model the behavior of cementitious materials under the conditions expected in a borehole repository and to provide data for the safety assessment of the installation. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 22838145
- Report Number(s):
- INIS-US--19-WM-16300
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
BOREHOLES
CEMENTS
COMPARATIVE EVALUATIONS
GAMMA RADIATION
INSTALLATION
MICROSTRUCTURE
NUCLEAR MATERIALS MANAGEMENT
RADIATION DOSES
RADIOACTIVE WASTES
RISK ASSESSMENT
SERVICE LIFE
WEAR RESISTANCE
X-RAY DIFFRACTION