Pipe failure caused by thermal loading in BWR water conditions

Research output: Contribution to journalArticleScientificpeer-review


Research units

  • VTT Technical Research Centre of Finland
  • TVO Power Company


This work summarises the results obtained from a failure analysis of a pipe crack in a BWR water clean-up system. The cracking occurred in an AISI 304 steel pipe section area where mixing of the water streams at two different temperatures (280° and 130°C) took place. The temperature difference and turbulence induced a cyclic thermal loading which, together with the environment, caused cracking. Cracking propagated as transgranular brittle cleavage-like fracture, probably on a stress level below yield stress. Cracking was still observed in areas where the cyclic temperature differences caused by turbulence were markedly lower. The AISI 304 steel was in fully solution annealed as-receiv{approaches the limit}d condition.


Original languageEnglish
Pages (from-to)445-455
Number of pages11
JournalInternational Journal of Pressure Vessels and Piping
Issue number6
Publication statusPublished - Nov 1981
MoE publication typeA1 Journal article-refereed

ID: 4214204