Effect of cyclic loading on IASCC stress threshold of thimble tube material with a dose up to 80 dpa under PWR conditions

Research output: Contribution to report/book/conference proceedingsIn-proceedings paperpeer-review


Institutes & Expert groups

  • Tractebel - Engie

Documents & links


IASCC (Irradiation Assisted Stress Corrosion Cracking) crack initiation tests were carried out on thimble tube material (≤ 80 dpa) retrieved from a Belgian PWR. The crack initiation tests were carried out by cyclic load testing of thimble tube specimens at different stress levels in a PWR environment. The time-to-failure was determined as a function of the applied stress to find a stress limit under which no stress corrosion cracking would take place. With these new results it is possible to compare constant load data of the previous test campaign with cyclic load data and find out what is the detrimental effect of load transients on the time-to-failure. The results of the cyclic loading tests showed that the failures occurred at a significantly lower average stress than under constant load conditions. This effect was more pronounced at lower stress levels.


Original languageEnglish
Title of host publicationInternational Symposium Contribution of Materials Investigations and Operating Experience to Light Water NPPs’ Safety, Performance and Reliability
Number of pages11
Publication statusPublished - 17 Sep 2018
Event2018 - FONTEVRAUD 9 - Palais des Papes, Avignon , France
Duration: 17 Sep 201820 Sep 2018


Conference2018 - FONTEVRAUD 9
City Avignon
OtherContribution of Materials Investigations and Operating Experience to LWRs’ Safety, Performance and Reliability
Internet address


  • Irradiated stainless steel, IASCC, crack initiation, PWR

ID: 4752810