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- Title
Simulation study on retardation of nuclides by granite geological barriers.
- Authors
LING Hui; WANG Ju; CHEN Weiming
- Abstract
To study the blocking effect of natural barriers on high level radionuclides, using Beishan area in Gansu as the background, based on the normal evolution scenario of repository, the GoldSim software was used to simulate and analyze the blocking performance of natural barrier to the release of nuclide in a single waste tank after the shutdown of the repository after 1 000 a. The results indicate that the maximum release rate of far-field nuclides is 23 309. 0 Bq/a, the main contributors are Se-79, Cs-135, Nb-93m and Pd-107. Non-conductive rock plays a key role in the retardation process. The length of non-conductive rock has a significant negative correlation with the far-field radionuclide release rate. The permeability coefficient has a positive correlation with the far-field radionuclide release rate, and the effect is greater than the length. When the permeability coefficient is 1.0 x 10-9 m/s, the far-field radionuclide release rate is reduced to 727.9 Bq/a.
- Publication
China Sciencepaper, 2017, Vol 12, Issue 21, p2507
- ISSN
2095-2783
- Publication type
Article