Prestressing technology for increased integrity of embrittled reactor vessels

  • Kornfeldt H
  • Österlund P
  • 2

    Readers

    Mendeley users who have this article in their library.
  • 1

    Citations

    Citations of this article.

Abstract

Prestressing has the potential to improve safety margins in pressure vessel failure assessments for reactor vessels that have been subjected to neutron embrittlement. The technology is a mechanical alternative to annealing. Prestressing a reactor pressure vessel reduces the resultant stress in the vessel wall. This includes stresses due to normal operating pressure, possible residual stresses and pressurized thermal shock transients (PTS). The reduced stress intensity factor affects crack growth rates and conditions for crack arrest. Prestress can be accomplished by applying a mechanical tool on the outside diameter of the vessel in the region of concern. A technique to permanently apply a compressive load based on wire winding technology, utilizing shape-memory alloy wire, is currently under development. © 1994.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • H. Kornfeldt

  • P. Österlund

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free