Scientists
from the University of Bristol Cabot Institute are hitting two birds with one
stone, thanks to their lab-made diamond that can generate electricity and is
made from upcycled radioactive waste.
In nuclear
power plants, radioactive uranium is split in a process called nuclear fission.
When the atoms are split, heat is generated, and that heat then vaporizes water
into steam that turns electricity-generating turbines.
A severe
downside of this process is the creation of dangerous radioactive waste, which
ultimately deposits in the graphite core that it is housed in. Today, this
nuclear contamination is safely stored away until it stops being
radioactive…and with a half-life of 5,730 years, that takes quite a while.
The
scientists found a way to heat the radioactive graphite to release most of the
radioactivity in a gaseous form. The gas is subjected to high temperature and
low pressures that turn it into a man-made diamond. When these diamonds are
placed near a radioactive field, they generate a small electrical current. The
developers enclosed the diamond battery in another non-radioactive diamond to
absorb the harmful emissions, which in turn allowed for the generation of even
more electricity, making the battery nearly 100 percent efficient.
Powering the
future
The nuclear
diamond battery has an incredible lifetime, and will only be half used up by
the year 7746. This makes it an ideal power solution for “situations where it
is not feasible to charge or replace conventional batteries,” said Tom Scott, a
materials science professor at Cabot Institute. Flight times of planes,
satellites, or spacecraft could increase with such a lasting battery. Medical
devices like pacemakers and the artificial pancreas could become more reliable,
empowering users to live their lives more fully.
The
development also presents an incredibly efficient way to treat radioactive
waste. Within the past 40 years, the US has amassed 76,430 metric tons (84,250
tons) of this waste. Supplying the Earth with electricity is a daunting task
even without a focus on sustainability. Now, it looks like experts are on the
right track with this nuclear-powered diamond battery. It’s almost like the
holy grail of electricity generation, or as Scott puts it, “no emissions
generated and no maintenance required, just direct electricity generation.”
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