Sorption of 137Cs, 90Sr, Se, 99Tc, 152(154)Eu, 239(240)Pu on fractured rocks of the Yeniseysky site (Nizhne-Kansky massif, Russia)

The study demonstrates the effect of sorption properties of fractured host rocks from the Yeniseysky site (Nizhne-Kansky rock massif, Krasnoyarsk region) on the migration of dissolved radioactive components (137Cs, 90Sr, 79Se, 99Tc, 152(154)Eu, 239(240)Pu) in the deep geological conditions of a high...

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Bibliographic Details
Main Authors: Rozov, Konstantin, Rumynin, Vyacheslav, Nikulenkov, Anton, Leskova, Polina
Format: Conference Proceeding
Language:English
Subjects:
Aqueous solutions
Cesium 137
Cesium isotopes
Cesium radioisotopes
Fractures
Geology
High level radioactive wastes
Immobilization
Massifs
Mineral composition
Radioactive wastes
Radioisotopes
Rocks
Sorption
Strontium
Strontium 90
Strontium radioisotopes
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Summary:The study demonstrates the effect of sorption properties of fractured host rocks from the Yeniseysky site (Nizhne-Kansky rock massif, Krasnoyarsk region) on the migration of dissolved radioactive components (137Cs, 90Sr, 79Se, 99Tc, 152(154)Eu, 239(240)Pu) in the deep geological conditions of a high-level radioactive waste repository. Estimates of radionuclide distribution coefficients between the aqueous solution and fractured rocks obtained from sorption experiments. The influence of various petrographic types and fracture-filling substances on the retardation of radioactive components has been investigated. Based on the results of sorption experiments, we concluded that the type and attributes of rock discontinuities, as well as the mineral composition of the material in fractures, are crucial for the immobilization of radionuclides during their migration through a geological environment.
ISSN:2555-0403
2267-1242
DOI:10.1051/e3sconf/20199810007