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When, if ever, will nuclear fusion reach sustained, commercial electricity generation?

Facts
Why It Is Open
Fusion research has produced real breakthroughs, but every credible timeline for commercial deployment has slipped for decades; World Nuclear Association itself notes the field's own standing joke that commercial fusion has been "about 40 years away" since the 1970s. Current flagship projects target a demonstration of net electricity in the early 2030s to 2040, which is still a prototype, not proof that fusion can be operated economically and continuously at grid scale over decades the way a fission or gas plant is. 1
What Would Resolve This
A named fusion plant delivering sustained electricity to a public grid on ordinary commercial terms (not a subsidized one-off demonstration), or an authoritative body such as the IAEA or a national fusion program concluding commercial fusion is or is not achievable within a stated decade. 1
Discipline Needed
Plasma physics and fusion engineering 1
Question Kind
Mechanism 1
Question Status
Open 1
Reader Facing
Yes 1
Open Question

Fusion research has produced real breakthroughs, but every credible timeline for commercial deployment has slipped for decades; World Nuclear Association itself notes the field's own standing joke that commercial fusion has been "about 40 years away" since the 1970s. Current flagship projects target a demonstration of net electricity in the early 2030s to 2040, which is still a prototype, not proof that fusion can be operated economically and continuously at grid scale over decades the way a fission or gas plant is.

What would resolve this A named fusion plant delivering sustained electricity to a public grid on ordinary commercial terms (not a subsidized one-off demonstration), or an authoritative body such as the IAEA or a national fusion program concluding commercial fusion is or is not achievable within a stated decade.
OpenPlasma physics and fusion engineeringWorld Nuclear Association Information Library
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Source World Nuclear Association Information Library
Sources
1. World Nuclear Association Information Library
World Nuclear AssociationNuclear fusion power, Fusion research sectionView the Source
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