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Moisture levels and drying potential of the concrete in Swedish reactor containments

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Author

Summary, in English

The climatic conditions inside nuclear reactor containments are continuously monitored by the plant owners in order to e.g. maintain a suitable climate for the mechanical and electrical equipment. Due to the high temperatures, during operation, the concrete within the containment may act as a moisture source contributing to the humidity. To evaluate if, and to what extent, the concrete inside the containment influences the climatic conditions, the moisture distribution has to be determined. In order to do this, a measurement setup has been developed and tested. The results showed that the measurement setup was suitable for long term measurements of internal relative humidity in concrete. However, measurements close to the concrete surfaces showed tendencies of leakage, increasing the uncertainties of those measurements. The measurement setup was installed at three reactor containments in Sweden during the summer of 2012. Results from the monitoring campaign on one of the three reactor containments are presented in this paper. The results showed that the concrete was still drying after 30-35 years of exposure inside the containment.

Publishing year

2013

Language

English

Pages

1-03002

Publication/Series

EPJ Web of Conferences

Volume

56

Document type

Conference paper

Publisher

EDP Sciences

Topic

  • Materials Engineering

Conference name

International Workshop NUCPERF 2012: Long-Term Performance of Cementitious Barriers and Reinforced Concrete in Nuclear Power Plant and Radioactive Waste Storage and Disposal (RILEM Event TC 226-CNM and EFC Event 351)

Conference date

2012-11-12 - 2012-11-15

Conference place

Caradache, France

Status

Published

ISBN/ISSN/Other

  • ISSN: 2101-6275
  • ISSN: 2100-014X