 |
Some low-level liquid radioactive wastes are condensed by evaporation
and recycled. Any leftover waste is solidified and buried with other
solid low-level radioactive wastes in concrete burial units or trenches.
Untreated low-level liquid wastes are injected underground into deep
porous rocks surrounded by layers of clay.
Russia’s approximately 30 nuclear power plants store their spent nuclear
fuel waste on-site. Liquid high-level radioactive waste from reprocessed
fuel is vitrified, or converted into solid form.
Reprocessing takes place at Chelyabinsk-65, a plant which has been
in operation for several years. A second facility is scheduled for
start up at Krasnoyarsk by 2015. Krasnoyarsk is already a central
storage facility for spent nuclear fuel.
Liquid wastes destined for solidification and disposal are transported
as liquids in trucks. Spent nuclear fuel assemblies are transported
using a cask and rail car designed to move the fuel.
Investigations of potential geologic repository sites by a number
of Russian institutions, including the Russian Academy of Sciences,
are ongoing. Russia is currently investigating several regions as
potential study sites. Four possible rock types are being considered
for disposal: salt, granite, clay, and basalt. Disposal plans include
using a multi-barrier approach.
Russia has a wide variety of geologic environments that contribute
to the selection of suitable sites. It is likely that one will be
chosen based on its proximity to a radioactive waste-producing facility.
A repository operation date is to be decided.
|
|
|