Evaluation of the effect of perforations in the collector vessel of a steam generator on the critical stress intensity coefficient

Autor:	A. A. Tutnov, O. D. Loskutov
Rok vydání:	2011
Předmět:	Materials science Fissure Pressurized water reactor Boiler (power generation) Mechanics Nuclear reactor Surface energy law.invention Crack closure medicine.anatomical_structure Nuclear Energy and Engineering law mental disorders Intensity coefficient medicine VVER
Zdroj:	Atomic Energy. 110:26-32
ISSN:	1573-8205 1063-4258
Popis:	An approach to calculating the effective critical stress intensity coefficient for mainline cracks in the perforation zone of the first-loop collector of a VVER steam generator is examined. The energy criterion is chosen as the condition for crack stability: the decrease of the elastic deformation energy which is due to the opening of a growing crack should not exceed the change of the surface energy of the crack in the process. The difference between the critical stress intensity coefficient for a mainline crack in the continuous and perforated regions is analyzed. Relations making it possible to lower the critical stress intensity coefficient as a function of the parameters of the perforation (spacing, diameter of openings) as well as the dimensions and orientation of the mainline crack in the perforation zone are presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ef98800b3c1881f5d7c8056b8dd69c9f https://doi.org/10.1007/s10512-011-9386-4 Zobrazit plný text záznamu Full text from SpringerLink