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Thirty years of measured prestress at Swedish nuclear reactor containments

Anderson, Patrick LU (2005) In Nuclear Engineering and Design 235(21). p.2323-2336
Abstract
The main function of the reactor containment, i.e. to ensure tightness at a major internal accident, depends directly on the prestressing system. To secure that the prestress level is sufficient, the tendon force has been measured during the whole time of operation. The general results from these measurements show that the loss of prestress 30 years after tensioning is between 5 and 10%. This is much lower loss than predicted initially at the design stage. More advanced and today commonly used models for predicting prestress loss show better agreement with the results. The main reasons for the relatively low loss are assumed to be: (1) the confirmed slow drying process of the concrete and (2) the high concrete age at the initial... (More)
The main function of the reactor containment, i.e. to ensure tightness at a major internal accident, depends directly on the prestressing system. To secure that the prestress level is sufficient, the tendon force has been measured during the whole time of operation. The general results from these measurements show that the loss of prestress 30 years after tensioning is between 5 and 10%. This is much lower loss than predicted initially at the design stage. More advanced and today commonly used models for predicting prestress loss show better agreement with the results. The main reasons for the relatively low loss are assumed to be: (1) the confirmed slow drying process of the concrete and (2) the high concrete age at the initial tensioning. The results also indicate that the temperature has a major influence on the loss of prestress. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nuclear Engineering and Design
volume
235
issue
21
pages
2323 - 2336
publisher
Elsevier
external identifiers
  • wos:000232671300008
  • scopus:27144552664
ISSN
1872-759X
DOI
10.1016/j.nucengdes.2005.04.002
language
English
LU publication?
yes
id
80b143d7-4661-44c7-8c85-ac0ef88b9fb4 (old id 218562)
date added to LUP
2007-09-13 16:56:05
date last changed
2017-07-30 03:42:42
@article{80b143d7-4661-44c7-8c85-ac0ef88b9fb4,
  abstract     = {The main function of the reactor containment, i.e. to ensure tightness at a major internal accident, depends directly on the prestressing system. To secure that the prestress level is sufficient, the tendon force has been measured during the whole time of operation. The general results from these measurements show that the loss of prestress 30 years after tensioning is between 5 and 10%. This is much lower loss than predicted initially at the design stage. More advanced and today commonly used models for predicting prestress loss show better agreement with the results. The main reasons for the relatively low loss are assumed to be: (1) the confirmed slow drying process of the concrete and (2) the high concrete age at the initial tensioning. The results also indicate that the temperature has a major influence on the loss of prestress.},
  author       = {Anderson, Patrick},
  issn         = {1872-759X},
  language     = {eng},
  number       = {21},
  pages        = {2323--2336},
  publisher    = {Elsevier},
  series       = {Nuclear Engineering and Design},
  title        = {Thirty years of measured prestress at Swedish nuclear reactor containments},
  url          = {http://dx.doi.org/10.1016/j.nucengdes.2005.04.002},
  volume       = {235},
  year         = {2005},
}