Modeling the influence of bubble pressure on grain boundary separation and fission gas release

Pritam Chakraborty, Michael R. Tonks, Giovanni Pastore

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Grain boundary (GB) separation as a mechanism for fission gas release (FGR), complementary to gas bubble interlinkage, has been experimentally observed in irradiated light water reactor fuel. However there has been limited effort to develop physics-based models incorporating this mechanism for the analysis of FGR. In this work, a computational study is carried out to investigate GB separation in UO2 fuel under the effect of gas bubble pressure and hydrostatic stress. A non-dimensional stress intensity factor formula is obtained through 2D axisymmetric analyses considering lenticular bubbles and Mode-I crack growth. The obtained functional form can be used in higher length-scale models to estimate the contribution of GB separation to FGR.

Original languageEnglish (US)
Pages (from-to)95-101
Number of pages7
JournalJournal of Nuclear Materials
Volume452
Issue number1-3
DOIs
StatePublished - Sep 2014

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Fingerprint Dive into the research topics of 'Modeling the influence of bubble pressure on grain boundary separation and fission gas release'. Together they form a unique fingerprint.

  • Cite this