Affiliations: Institute of Environmental Sciences, Beijing Normal
University,State Key Joint Laboratory of Environmental Simulation and Pollution
Control, Beijing 100875, China | China Institute for Radiation Protection, Taiyuan
030006, China
Abstract: The radionuclide migration from a certain Chinese repository with
low-intermediate level radioactive solid waste is studied. The migration in
groundwater is analyzed and computed in detail. Under presumption of normal
releasing, or the bottom of the repository has been marinated for one month
with precipitation reaching 600 mm once and a 6m aerated zone exists, a
prediction for 7 radionuclides is conducted. It shows that the aerated zone is
the primary barrier for migration. The migration for radionuclides ^60Co,
^137Cs, ^90Sr, ^63Ni, etc. will be retarded in it within 500 years. The
concentration of ^239Pu will be decreased by amount of 6 order. Only ³H
and ^14C can migrate through the aerated zone. The radionuclides that go
through the aerated zone and enter the aquifer will exist in spring, stream and
sea. Based on this, the intake dose by residents in different age group
resulting from drinking contaminated spring water, eating seafood is
calculated. The results showed that the impact of the repository to the key
resident group is lower than the limit in national repository regulation
standard. This complies with the repository management target.
