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New Codification Approach for the Design of NPP Containments With Metallic Liner

[+] Author Affiliations
Philippe Bécue, Yves Mézière

Electricité de France-SEPTEN, Villeurbanne, France

Morello Sperandio

AREVA, Lyon, France

Jean François Sidaner

AREVA D3S IG, Paris, France

Paper No. ICONE16-48953, pp. 1069-1076; 8 pages
doi:10.1115/ICONE16-48953
From:
  • 16th International Conference on Nuclear Engineering
  • Volume 1: Plant Operations, Maintenance, Installations and Life Cycle; Component Reliability and Materials Issues; Advanced Applications of Nuclear Technology; Codes, Standards, Licensing and Regulatory Issues
  • Orlando, Florida, USA, May 11–15, 2008
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4814-0 | eISBN: 0-7918-3820-X
  • Copyright © 2008 by ASME

abstract

We address in this paper the case of a new generation PWR NPPs, which containment is equipped with a metallic liner on the inner face, in order to minimise leakage. A net of angles that, in addition to studs, constitute the anchoring system to the concrete, strengthens this metallic liner, also used as concrete shuttering during the construction phase. The thickness of the plate, the size and distribution of the anchors and the mechanical characteristics of the steel are the main parameters of the liner design. The accidental and in service loadings on the liner which are mainly due to the concrete pre-stressing and shrinkage and to the temperature inside the containment, can lead to local blistering. This phenomenon was observed on 900 MW PWR currently in operation in France. Difficulties related to the application of the available codification while using modern numerical methods are in a large extent due to the small strain allowable for the liner plate, considering the above loadings in addition with initial imperfections or failure of one or several studs. In order to cope with this problem, while respecting the safety requirements, a new codification approach has been developped.

Copyright © 2008 by ASME
Topics: Design

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