Needham: SPARC reactor targets 100MW thermal power with 10x energy gain
Rick Needham · The tape that led to a fusion breakthrough · Jun 18, 2025 · at 19:16
Commonwealth Fusion Systems CCO Rick Needham outlines the performance targets and expected net energy output for the SPARK demonstration device.
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“That'll produce about a hundred megawatts of thermal power. So a lot like 500 to a thousand times what the national ignition facility did, like a substantial amount of power. And his design point is actually a gain of like 10, so 10 times, actually it's 11 more, more heat out than in.”
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