Like older models, they will
use uranium fission to heat water and drive a turbine, but these reactors will be smaller, simpler to build, and each will add more than 1100 megawatts of capacity to the region's power grid when they come online in 2016 or 2017 — without emitting carbon dioxide.
Not exact matches
The nuclear power plants in
use around the world today
use fission, or the splitting of heavy atoms such as
uranium, to release energy for electricity.
The reactor
uses uranium dioxide fuel particles that are also coated with graphite so they will not crack and release
fission products even in extreme heat.
The competing SFR design banks on a novel
fission concept: bombarding
uranium atoms with neutrons of much higher energy than those
used in a traditional nuclear plant.
Most nuclear reactors
use uranium fuel that has been «enriched» in
uranium 235, an isotope of
uranium that
fissions readily.
All commonly
used medical radioisotopes can be produced without
using nuclear reactors or enriching
uranium, or can be replaced with other isotopes that can be produced without a
fission reaction, or by alternative technologies.
Today's nuclear power plants
use the heat from
uranium fission reactions to do nothing more complicated than boil water, making pressurized steam that spins turbines to generate electricity.
Enriched
uranium oxide is formed into rods and water is
used both as a coolant, flowing through the reactor core to transfer heat away, and as a moderator, slowing down neutrons released by
fission so that they promote further nuclear reactions.
LWR
used nuclear fuel is composed of 95 %
uranium, one percent transuranics, and four percent
fission products.
If that thought is not enough, consider this, the current
fission products from the
uranium fuel cycle may be mitigated
using some of the reactors that are capable of initiating the thorium fuel cycle.
However, there are materials which could be
used, such as thorium, that not only to mitigates the super long half - life of the products of
fission but also provides a cheap alternative to
uranium.
If that thought is not enough, consider this, the current
fission products from the
uranium fuel cycle may be mitigated
using some of the reactors that are capable of initiating the thorium fuel cycle.
Uranium fission provides reliable heat from reactions that are six orders of magnitude (powers of ten) more energy dense than the combustion reactions
used to produce energy from coal, oil and natural gas.
Nuclear power plants, however, heat the water
using fission reactions, splitting atoms of
uranium or plutonium and producing no carbon emissions.
So we have about 500 times more thorium available for
use in
fission reactors than
uranium - 235.