Crack initiation testing of highly irradiated stainless steel (thimble tube material with a dose up to 80 dpa) under PWR conditions

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

Authors

Institutes & Expert groups

Documents & links

Abstract

IASCC (Irradiated Assisted Stress Corrosion Cracking) crack initiation tests have been carried out on thimble tube material retrieved from a Belgian PWR. The thimble tube was made of 316L cold worked stainless steel and irradiated up to 80 dpa. A test setup for crack initiation tests with O-rings (sections of the thimble tube) under relevant PWR conditions has been designed and constructed. This included the design and adjustment of the O-ring compression test setup to fit into hot cell autoclaves and the development and commissioning of handling tools for sample installation and test performance. The dose profile along the thimble tube ranges from 45 to 80 dpa. This allows to add crack initiation data for dpa values that have not been significantly acquired in the range of 40-50 dpa and at 80 dpa. The first results show that intergranular cracking occurred in the O-ring specimen stressed to 70 % of the irradiated yield stress in less than a day. The on-going tests will add data at the highest dpa values tested up till now.

Details

Original languageEnglish
Title of host publicationFontevraud 7 Symposium - Contribution of Materials Investigations to Improve the Safety and Performance of LWRs
Place of PublicationParis, France
Publication statusPublished - Sep 2010
EventFontevraud 7 Symposium - Contribution of Materials Investigations to Improve the Safety and Performance of LWRs - Avignon, France
Duration: 26 Sep 201030 Sep 2010

Conference

ConferenceFontevraud 7 Symposium - Contribution of Materials Investigations to Improve the Safety and Performance of LWRs
Country/TerritoryFrance
CityAvignon
Period2010-09-262010-09-30

Keywords

  • stress corrosion cracking, PWR, stainless steel

ID: 277244