|
Edited on Fri Aug-13-04 12:10 PM by NNadir
I don't think you know what a fully loaded cost is, but it includes both external and internal costs.
Internal costs include fuel, facility (capital construction and maintenance), salary and benefit, and amortization costs. Sometimes you hear people say "solar energy is free" because they are only paying attention to fuel costs. This is equivalent to "nuclear power is too cheap to meter," the remark made famously in the 1950's by a government hack. On a fuel basis, nuclear power is indeed "too cheap to meter," but when one includes infrastructure it is quite a different matter.
The facility cost is a very important variable and is very much dependent on design. French nuclear power is very cheap because the French relied on proven, reliable and standardized design. Some American Nuclear plants on the other hand were financial disasters because of poor design and the need for retrofitting to address absurd demands on the part of a very poorly educated public.
The cost of fuel is very dependent on location. There are places on earth where the fully loaded cost of natural gas, internal and external, is actually lower than nuclear power, because the plants are next to natural gas fields. There are places on earth where because of the necessity of pipelines that natural gas is prohibitively expensive. The same situation applies to coal, coal plants near mines have internal costs that match or exceed nuclear.
Another factor in cost is load utilization. When nuclear plants were running at 70% capacity, as they were in the 1970's, they were very uncompetitive. Now that most nuclear plants run at 90+% capacity, they are very cheap to run. In the nuclear case, this has to do with experience in operations and technological advances in fuel loading.
The same considerations apply to wind energy. Some plants (windmills) have better design than others. This area, windmill design, as been the primary reason that the cost of wind generated electricity has fallen so precipitously in the last decades. The internal cost of a wind plant is extraordinarily high where the wind blows infrequently of course.
The external cost of energy is generally what is NOT charged by the supplier, but is paid by the public at large in health costs and in the financial and aesthetic costs of environmental degradation, which can be extraordinary. Coal is roughly competitive with wind and nuclear if one ignores these costs. If one includes them, as one should, coal is far too expensive too be employed by rational beings.
External costs are also a function of design. The Chernobyl graphite moderated RBMK reactor had a very high external cost. The average French pressurized water reactor has an extremely low external cost. This is an issue of design. If one builds a reactor with a positive void coefficient, one has a high probability of raising external cost, but most people have not chosen to build such monstrosities. It is worth noting that the nuclear industry is the ONLY energy industry that internalizes external costs. In the wind industry, external costs are mostly trivial.
Wind energy is not the same cost everywhere, but globalized it is in fact the lowest cost energy on a fully loaded basis.
|