Development and anneal of radiation damage in saltFunded under: FP2-RADWASTOM 4C
Gamma irradiation of NaCl produces various lattice defects whose aggregation leads to decomposition of the NaCl crystal into Na-metal colloids and Cl(2) microbubbles. Recombination of these lattice defects liberates the energy stored in them. Several laboratory gamma irradiations of natural and synthetic halite were performed and the evolution of the energy storage in NaCl lattice defects with increasing doses was studied. The stored energy values are compared to the amounts of Na-colloids obtained from simulations using the Jain-Lidiard model. Dislocation arrays revealed by optical analysis are interpreted using dislocation dynamics criteria. The models are found to overestimate the damage for long term and low dose rate. This is partially explained as due to the fact that the models consider damage development and back reactions but not recovery. Recovery causes additional anneal of colloids, but is a slow process, and is therefore of greater importance at low dose rates and high temperature.
Bibliographic Reference: EUR 15941 EN (1995) 72 pp., FS, ECU 10
ISBN: ISBN 92-826-9137-3
Record Number: 199411371 / Last updated on: 1995-03-21
Original language: en
Available languages: en