Fuel cycle in nuclear fusion reactors

In a torus system as planned for ITER, only a small amount of deuterium and tritium is fused per combustion cycle before the resulting helium leads to the process being aborted.






  Tritium recovery
Tirtium is radioactive and expensive. It must therefore be recovered in the fuel cycle of the fusion reactor. At ITER, it is estimated that around 1 kg of tritium must be separated from deuterium with a purity of 1:10 to the power of 8 per hour from the gases after fusion.

  Kyropumps
There are no conventional vacuum pumps for use in the fusion reactor. This is why kyropumps are being developed for this purpose. The solution is to freeze the gas instead of sucking it in. This is followed by the removal of the radioactive and tritium from the exhaust gases, which is still needed for the next fusion process.

  How high is the self-consumption?
There are currently 4 known energy-intensive processes in which a fusion reactor first requires a lot of electricity.

  • Kyro vacuum pumps for producing the vacuum
  • Magnetic fields for the confinement of the plasma
  • Heating the plasma to fusion temperature
  • Depletion of the exhaust gas by a factor of 10 to the power of 8 to recover the radioactive tritium.
Knowing your own consumption is important in order to estimate the total amount of electricity that can be produced, because the amount of cooling options is limited.
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Facts about nuclear fusion research. What is the truth about fusion? Eternally available clean energy source or the gateway to a total nuclear state?

Cooling - the limits of nuclear fusion
Whether burning fossil fuels, splitting nuclei or fusing nuclei, every power plant requires cooling. The cooling requirement for nuclear fusion in particular is very high.
Electricity costs for the fusion reactor
Cost forecast for the production of electricity from nuclear fusion. Extrapolation of known facts to a profitability calculation for fusion power plants.
JET and ITER nuclear fusion
Key figures from the energy balance. What colorful glossy brochures to the responsible politicians conceal, but is very easy to understand.
Correctly interpreting the energy balance
If an energy balance of 1:5 were to be achieved at ITER, the experiment would still have failed, because this would be unusable when converted to power plant operation.
The nuclear fusion reactor as a breeder for plutonium 239
If electricity production in a nuclear fusion reactor is already too expensive, then there will be a tremendous desire to breed plutonium 239 with it.
Nuclear fusion - entry into the total nuclear state
If the first nuclear fusion reactor goes into operation at a time of exploding oil prices and energy shortages, it will not be possible to stop plutonium breeding.


          Fuel cycle in nuclear fusion reactors: In a torus system as planned for ITER, only a small amount of deuterium and tritium is fused per combustion cycle before the resulting helium leads to the process being aborted. https://politics.pege.org/2004-nuclear-fusion/brennstoffkreislauf.htm

Context description:  politics political