Publication detail

Decreasing thermal stresses in steam generator collector welds area using external cooling

KRAUTSCHNEIDER, R. JOCH, L.

English title

Decreasing thermal stresses in steam generator collector welds area using external cooling

Type

Paper in proceedings (conference paper)

Language

en

Original abstract

Presented paper deals with possibility of external cooling of steam generator welds area to decrease internal tensile thermal stresses which are one of the causes of cracking in this area. On various WWER-440 nuclear power plants (NPP) steam generators (SG) occurred quite serious problem of cracking in weld joints connecting primary collectors to the SG vessels nozzle. The cause of this cracking is stress corrosion cracking (SCC) mechanism. Results of these analyses showed that by proper external cooling of the weld area it is possible not just to decrease significantly existing tensile stresses, but to change them into compressive ones. This of course would have great impact on crack occurrence and growth.

Keywords in English

steam generator; thermal stresses; external cooling; stress corrosion cracking; dissimilar metal weld

Released

2016-05-05

Publisher

Elsevier

ISSN

2211-8128

Book

Procedia Materials Science

Journal

Procedia Materials Science

Volume

12

Number

1

Pages from–to

12–17

Pages count

6

BIBTEX


@inproceedings{BUT109173,
  author="Roman {Krautschneider} and Lukáš {Joch}",
  title="Decreasing thermal stresses in steam generator collector welds area using external cooling",
  booktitle="Procedia Materials Science",
  year="2016",
  journal="Procedia Materials Science",
  volume="12",
  number="1",
  pages="12--17",
  publisher="Elsevier",
  doi="10.1016/j.mspro.2016.03.003",
  issn="2211-8128",
  url="http://www.sciencedirect.com/science/article/pii/S2211812816000122"
}