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Nuclear
Power and Green Energy
By Cyril Anderson In the past
decades, there has been a movement for "green energy" away from
polluting energy generating methods like coal and oil fired plants.
As well, there has been a push for hydrogen as a source of fuel for
cars. Now this is a good
thing. It is good to not burn
coal or oil. Not necessarily
because of alleged "greenhouse effects" of CO2, but
rather because oil is better used to make important organic chemicals for
the chemical industry. For
civilization to be sustained, and for development to continue so as to
bring a good standard of living to all the earth's inhabitants, a goal
that should be a moral imperative of sorts for any believer in God,
immense amounts of power will be needed.
Indeed this need for energy for increased development and growth is
a law of nature. Calculations
show that as the level of technology of a society increases, the power
used per capita, and power usage density rise correspondingly. This has
been matched with dependence on more and more powerful sources of energy
to provide for this. Early
on, mankind used wood or brush, after, charcoal, later, coal, later still,
oil, and for launching rockets and shuttles for space exploration,
hydrogen gas. Each of these
representing a step up in terms of energy delivered per unit mass of fuel.
As well, with each step up, there has been a corresponding
improvement in the “cleanness” of the energy source. All of these previous developments
however represent chemical sources of energy, given by the breaking and
forming of chemical bonds governed by the electromagnetic force of nature. In the 20th
century, there were great discoveries in physics regarding the nature of
the atom, in particular, its nucleus, and the even stronger nuclear force
governing it. In the mid-20th
century, research by physicists and engineers unlocked the possibilities
of using the immense energy of the atomic nucleus as a source of energy,
both in a positive in the first experimental nuclear reactors, and more
negatively, in the development of nuclear weapons. Starting in
the second half of the 20th century, this initially military technology
began to be used for civilian power generation.
Unfortunately, through hysteria from largely misinformed
environmental groups, resistance to nuclear power appeared, beginning in
the turbulent times of the 1960’s.
Thankfully, this hysteria is beginning to fade, and nuclear being
seen for the excellent option it is, as a high energy density and clean
alternative to other sources of energy that promises to provide the basis
for the economic development of the coming decades. Nuclear
energy can not only replace coal, gas and oil-fired power plants, but can
also help to enable other technologies that can improve human
civilization. Nuclear power
plants can be used as a source of energy for the energy intensive
production of hydrogen gas from water, allowing the replacement of oil as
a source of energy for automobiles. In
addition, the heat from nuclear power can be used for industrial
desalination that can be used to keep up with the increasing water demands
of increasing populations and increasing industrialization. Still, the
objection raised because of so-called "nuclear waste."
However, the fact is that much of what is called nuclear waste can
actually be recycled through reprocessing.
First, it is useful to examine in some detail the nuclear fuel
cycle. First uranium ore is
mined, and natural Uranium oxide ore, UO2 ore is extracted from
mines. The Uranium metal is
then processed to Uranium Hexaflouride gas, UF6.
It is then useful to note that natural Uranium has two isotopes ,
or forms: U238, which is not radioactive, and which makes up
99.5% of Uranium, and U235, which makes up the remaining 0.5%
and which undergoes fission decay, producing heat. The UF6 gas
is then processed to "enrich" the level of U235,
exploiting either differential gas diffusion through membranes, or using
centrifuges for separation of the gases, which have different densities.
For nuclear power plant fuel, the U235 is enriched to a
little under 5% concentration, while for nuclear weapons, the enrichment
is more on the order of 95%. The
lowly enriched uranium fuel is then fabricated into fuel for power plants,
in the form of fuel rods or pellets, depending on the reactor design.
The fuel is usually used for a period of a few years, and then
removed. After a cooling down
period, the spent fuel is currently usually buried, but in a fully
functioning fuel cycle, this spent fuel can be reprocessed to extract
un-reacted trace U235 and Plutonium, usable as fuel in more
sophisticated reactors. Theoretically,
the "waste" could also be processed to make radioactive isotopes
for radioactive medicine and other uses.
The tiny leftover highly radioactive remnants can then be buried in
secure locations for disposal. Those
environmentalists who would make mountains out of the molehill of this
waste should reflect on the tonnes of waste produced by coal and oil
plants that is overall much more hazardous. Nuclear
power represents an order of magnitude step up beyond any other existing
power source in terms of energy per mass of fuel, giving about a
million times as much energy, gram per gram, as petroleum.
No other currently viable source is even in the same ball park.
This represents a natural continuation of humanity's increased levels of
technological power over time. The
next generation, given further research, would be nuclear fusion, the
energy source of the stars, an even greater order of magnitude leap above
nuclear fission in terms of energy output per gram of fuel, and even
cleaner, producing Helium gas as a waste product and using Hydrogen
isotopes as a fuel. Industrial
scale fusion power, however, is not anticipated to be feasible for at
least 25-30 years, fission power is a necessity to maintain and permit
real global economic growth. So called
“alternative energies” are really no alternative. Wind and solar are not viable options for a modern,
industrialized world with a decent standard of living for 6 billion or
more human lives. The power
density offered by wind and solar are simply not sufficient for the task
at hand. Simply put, it is a
pipe dream, much like the much-ballyhooed "bio-diesel," or
ethanol fuel for cars, which actually requires more petroleum than it
saves, once the oil needed for the energy intensive process of preparing,
planting, harvesting, and fermenting the products of fields of corn for
ethanol is factored into the equation.
It is pure insanity driven by short-sighted political machinations,
going to show the folly of trusting those under the influence of ethanol!
Estimates indicate that to replace even a paltry 25% of America's
gasoline needs with ethanol would require the planting of over 10% of the
US landmass with corn! This
is aside from any agriculture for food for humans and animals.
The truth
is that an aggressive program of development of nuclear power, as
contemplated or on the books currently in Ontario, the United States, some
nations in Europe, Russia, China, India, and now, Iran is really the only
sane solution to the demands of truly sustainable development that will
allow the whole world to reach the standard of living that we in Canada
tend to take for granted. |
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