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Long-term leaching behaviour of radionuclides in mortar matrices for low level waste management

R. Deju, M. Mincu

2023enleaching behaviourradioactive wastewaste managementgamma-ray spectrometrymortars

Abstract

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During the interim storage or final disposal of low level waste, migration/diffusion of radionuclides can occur when the waste comes in contact with water. This study aims to analyze the long-term leaching behaviour of 137Cs, 60Co, and 152Eu radionuclides incorporated in mortar matrices made from natural aggregates and recycled radioactive concrete. The methodology involves two years of mortar testing, wherein samples were immersed in distilled water for 30 days, and leached activity was measured using gamma-ray spectrometry with an HPGe detector and GESPECOR code for efficiency evaluation. The effects of curing time, aggregate type, and size distribution on leaching behaviour were investigated. Results indicated that the long-term leaching behaviour could be evaluated from the leaching data by calculating the apparent diffusion coefficient. These findings are significant for increasing safety in the storage of low level radioactive waste, particularly for the radioactive concrete generated during the decommissioning of nuclear facilities.

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Cite This Work

@article{8321afb0-22ff-4985-a82b-11cb1c76f2a4,
  title={Long-term leaching behaviour of radionuclides in mortar matrices for low level waste management},
  author={R. Deju and M. Mincu},
  year={2023},
  language={en}
}
TY  - JOUR
TI  - Long-term leaching behaviour of radionuclides in mortar matrices for low level waste management
AU  - R. Deju
AU  - M. Mincu
PY  - 2023
LA  - en
ER  -

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