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- Title
MODELLING OF RESIDUAL STRESSES, RADIATION SWELLING AND STRESSED STATE OF IN-SERVICE WWER-1000 REACTOR BAFFLE.
- Authors
MAKHNENKO, O. V.; MIRZOV, I. V.; POROKHONKO, V. B.
- Abstract
The question of effect of baffle residual welding stresses on radiation swelling value has appeared in course of works on life extension of WWER-1000 reactor internals at the second power generating unit of the South-Ukrainian NPP. The E.O. Paton Electric Welding Institute has developed and realized a mathematical model for determination of residual stress-strain state of WWER-1000 reactor baffle in electroslag welding with further heat treatment as well as a model for calculation of baffle radiation swelling taking into account radiation creep. It can be stated based on the results of mathematical modelling that the baffle stressed state after 60 years of operation, calculated taking into account residual welding stresses, is close to the results received using the model without welding. This work studies relaxation of residual welding stresses in the WWER-1000 baffle under effect of irradiation and works out their in-service value-to-time dependence. 15 Ref., 3 Tables, 11 Figures.
- Subjects
BAFFLES (Mechanical device); RESIDUAL stresses; SWELLING of materials; MATHEMATICAL models
- Publication
Paton Welding Journal, 2016, Issue 4, p32
- ISSN
0957-798X
- Publication type
Article
- DOI
10.15407/tpwj2016.04.03