A model for void-induced back reaction between radiolytic products in NaCl

A.A. Turkin, V.I. Dubinko, D.I. Vainshtein, H.W. den Hartog

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Abstract

A kinetic model is formulated for the chemical reaction between radiolytic sodium colloids and gas bubbles, which are brought into contact with each other during the exposure to ionising radiation by the growing voids. The reaction starts with the evaporation of Na atoms into the void due to the localized heat release caused by reactions between chlorine molecules colliding with the colloid surface. It is shown that this exothermic and autocatalytic reaction leads to a sudden temperature increase inside the void, which gives rise to thermoelastic stresses in the surrounding matrix. Tangential stresses might exceed the threshold stress required for localized cleavage of the matrix resulting in crack formation and mechanical instability of NaCl under high dose irradiation. (C) 2002 Published by Elsevier Science B.V.

Original languageEnglish
Article numberPII S0168-583X(02)00517-7
Pages (from-to)83-88
Number of pages6
JournalNuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms
Volume191
Issue number1
DOIs
Publication statusPublished - May-2002
Event11th International Conference on Radiation Effects in Insulators - , Portugal
Duration: 3-Sep-20017-Sep-2001

Keywords

  • NaCl radiolysis
  • radiation-induced fracture
  • IRRADIATED NACL

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