The Safe, Secure Interim Storage of Spent
Fuel
NUCLEAR POWER, unlike energy created by fossil fuels,
does not release carbon dioxide, which is believed to be the reason
for global warming. And most of all, the merit of nuclear power
that makes it so attractive as a beneficial resource to Japan
is that the fuel once used in reactors (spent fuel) can be recycled
and reused.
After being used in reactors, spent fuel, however, still contains
1% "unburnt" uranium 235 as well as 1% of plutonium,
a by-product of the fission process, and 95% of uranium 238. All
these resources, a total of 97% of spent fuel, can be extracted
and reused as fuel by reprocessing. Recycling spent fuel makes
efficient use of the uranium resource and will help solidify energy
security in Japan. So it is necessary to properly manage spent
fuel for reprocessing.
Currently, the spent fuel waiting to be reprocessed is housed
in special storage facilities built within Japanese nuclear power
plant premises. As of September 1998, 7,020 tonsU of spent fuel
were stored in these on site facilities, with a combined capacity
of 12,600 tonsU. Given these figures, the storage situation may
appear to be well in hand for some time. But the prospect is that
Japan must augment its existing storage capacity with new off-premise
facilities by 2010 to meet an impending shortage.
The reason for this is that Japan's reliance on nuclear power
for its electricity needs is expected to grow, and so too will
the output of spent fuel. At present, approximately 900 tonsU
of spent fuel is produced annually, but it is predicted that by
2010 it will be 1,400 tonsU, and 1,900 tonsU by 2030. Japan's
first commercial reprocessing facility, which is under construction
and slated to begin operation in 2005, will be operated at a reprocessing
capacity of 800 tonsU per year. So spent fuel must be stored in
an interim storage facility until it is transferred to a reprocessing
plant all with the utmost safety and security.
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