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2. Preventing damage from excessive deformation
2.1 Definitions
Excessive deformation" is defined as the existence of significant residual deformation following removal of the load. The load corresponding to excessive deformation is also that for which there is a sudden increase in the rate of change of a characteristic dimension of the equipment for a certain increase in the applied load, i.e. for which generalized plasticization of the wall appears. The definitions given in the
It should be noted that this definition only makes sense in the case of imposed stresses, and implies that the damage caused by excessive deformation cannot paradoxically be associated with imposed deformations....
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Preventing damage from excessive deformation
Preventing plastic instability damage
Documentation sources
Text references
Websites
ASME American Society of Mechanical Engineers http:/;/;www.asme.org
AFCEN Association Française pour les règles de conception et de construction des Chaudières Électro-Nucléaires (French association for the design and construction of electro-nuclear boilers) http:/;/;www.afcen.com
...Regulations
Arrêté du 12 décembre 2005 applicable aux Équipements Sous Pression Nucléaires (ESPN) ; JO de la République Française, January 22, 2006.
Arrêté du 26 février 1974 portant application de la réglementation des appareils à pression aux chaudières nucléaires à eau. Collection of texts published in "Sûreté Nucléaire en France". Les éditions des Journaux Officiels.
Directive 97/;23/;EC...
Standards
- Récipients sous pression non soumis à la flamme. - NF EN 13445 -
- Tuyauteries industrielles métalliques. - NF EN 13480 -
- Chaudières à tubes d'eau et installations auxiliaires. - NF EN 12952 -
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