Advanced

Long-term hygrothermal performance of nuclear reactor concrete containments - Laboratory evaluations of measurement setup, in situ sampling, and moisture flux calculations

Oxfall, Mikael LU ; Johansson, Peter LU and Hassanzadeh, Manouchehr LU (2016) In Cement & Concrete Composites 65. p.128-138
Abstract
A measurement setup for in situ sampling of internal relative humidity and temperature in concrete structures was developed. The setup was used to evaluate the moisture conditions and to determine whether drying of the concrete components within a nuclear reactor containment contributes to the moisture conditions. The measurement setup was tested for accuracy and thereafter installed in Swedish nuclear reactor containments for in situ monitoring. Results from the measurements confirmed that the setup is suitable, especially for long-term measurements at depths of 50 mm or more. Complementary moisture transport calculations showed that the moisture flux from the concrete to the interior of the reactor containment have a noticeable effect on... (More)
A measurement setup for in situ sampling of internal relative humidity and temperature in concrete structures was developed. The setup was used to evaluate the moisture conditions and to determine whether drying of the concrete components within a nuclear reactor containment contributes to the moisture conditions. The measurement setup was tested for accuracy and thereafter installed in Swedish nuclear reactor containments for in situ monitoring. Results from the measurements confirmed that the setup is suitable, especially for long-term measurements at depths of 50 mm or more. Complementary moisture transport calculations showed that the moisture flux from the concrete to the interior of the reactor containment have a noticeable effect on the environmental conditions in the containments. The calculations of the moisture condition in the concrete show that 15-30% of the evaporable water in the concrete has been dried out during the 30 years of operation. (C) 2015 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Concrete, Internal relative humidity, Measurement techniques, Nuclear, power plants, Field measurements, Long-term performance
in
Cement & Concrete Composites
volume
65
pages
128 - 138
publisher
Elsevier
external identifiers
  • wos:000367700400014
  • scopus:84945554744
ISSN
0958-9465
DOI
10.1016/j.cemconcomp.2015.10.012
language
English
LU publication?
yes
id
3762577b-8cf1-4495-9d31-f5291361dcbb (old id 8761276)
date added to LUP
2016-02-23 07:01:55
date last changed
2017-05-21 03:21:01
@article{3762577b-8cf1-4495-9d31-f5291361dcbb,
  abstract     = {A measurement setup for in situ sampling of internal relative humidity and temperature in concrete structures was developed. The setup was used to evaluate the moisture conditions and to determine whether drying of the concrete components within a nuclear reactor containment contributes to the moisture conditions. The measurement setup was tested for accuracy and thereafter installed in Swedish nuclear reactor containments for in situ monitoring. Results from the measurements confirmed that the setup is suitable, especially for long-term measurements at depths of 50 mm or more. Complementary moisture transport calculations showed that the moisture flux from the concrete to the interior of the reactor containment have a noticeable effect on the environmental conditions in the containments. The calculations of the moisture condition in the concrete show that 15-30% of the evaporable water in the concrete has been dried out during the 30 years of operation. (C) 2015 Elsevier Ltd. All rights reserved.},
  author       = {Oxfall, Mikael and Johansson, Peter and Hassanzadeh, Manouchehr},
  issn         = {0958-9465},
  keyword      = {Concrete,Internal relative humidity,Measurement techniques,Nuclear,power plants,Field measurements,Long-term performance},
  language     = {eng},
  pages        = {128--138},
  publisher    = {Elsevier},
  series       = {Cement & Concrete Composites},
  title        = {Long-term hygrothermal performance of nuclear reactor concrete containments - Laboratory evaluations of measurement setup, in situ sampling, and moisture flux calculations},
  url          = {http://dx.doi.org/10.1016/j.cemconcomp.2015.10.012},
  volume       = {65},
  year         = {2016},
}