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Re:US Department of Energy: Fusion Ignition Achieved by dogma1138 on Tuesday December 13, 2022 @12:45PM (#33972607)
Depending on the scale and reactor design, we have really good examples of run away fusion reactions. Run away reactions are easy, controlled ones are hard.

And whilst I won’t doubt that if fusion ever becomes commercially viable the reactors would be walk away safe it doesn’t mean that you don’t need to account for that in your design.

Re:US Department of Energy: Fusion Ignition Achieved by willis936 on Tuesday December 13, 2022 @01:12PM (#33973154)
What is an example of a run away fusion reaction?
Re:US Department of Energy: Fusion Ignition Achieved by dogma1138 on Tuesday December 13, 2022 @01:21PM (#33973329)
The US strategic arsenal.
Re:US Department of Energy: Fusion Ignition Achieved by blamestross on Tuesday December 13, 2022 @01:24PM (#33973388)
A Hydrogen Bomb. It is basically using a nuke (fission) to trigger fusion instead of lasers.
Re:US Department of Energy: Fusion Ignition Achieved by willis936 on Tuesday December 13, 2022 @02:22PM (#33974318)
That is a run away fission reaction that ignites a short lived fusion reaction. We don't even talk about neutron populations or k factors in fusion because there is no avalanche effect possible.