Publication detail

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

KRAUTSCHNEIDER, R. JOCH, L.

Original Title

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

Type

conference paper

Language

English

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

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

Authors

KRAUTSCHNEIDER, R.; JOCH, L.

RIV year

2014

Released

5. 5. 2016

Publisher

Elsevier

ISBN

2211-8128

Periodical

Procedia Materials Science

Year of study

12

Number

1

State

Kingdom of the Netherlands

Pages from

12

Pages to

17

Pages count

6

URL

http://www.sciencedirect.com/science/article/pii/S2211812816000122

Full text in the Digital Library

http://hdl.handle.net/11012/204196

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"
}