Commercial Fusion Power — Net Electricity at Grid Scale

Engineering energy-chain gap. NIF achieved target gain greater than one by producing 3.15 MJ from 2.05 MJ of laser energy delivered to the target, but the comparison excludes the hundreds of megajoules of electricity needed to operate the laser system and the experiment generated no electricity. Crossing from target or plasma gain to plant-level net electricity requires substantially higher fusion gain together with efficient drivers, heat capture, electricity conversion and low recirculating power. Magnetic-confinement programmes face a different engineering chain but the same claim-level boundary: no approach has yet exported net electricity. The resistance mechanism is not that fusion physics is invalid; it is the unresolved full-system conversion from a fusion experiment to a self-sustaining electricity-generating plant.

Materials and tritium breeding. A commercial fusion plant requires plasma-facing materials that survive neutron bombardment at intensities not yet tested at relevant fluence levels, and must breed its own tritium fuel from lithium blankets at breeding ratios sufficient to sustain operation. Neither materials performance at commercial fluence nor tritium breeding at the required ratio has been demonstrated in a fusion environment. These are threshold 2 problems — they must be solved before grid-scale operation is achievable. They are not currently active research frontiers in the same sense as plasma physics; they are known engineering gaps that will become critical as the field advances toward threshold 2.

Three-threshold sequential dependency. The claim's three thresholds are ordered and each is necessary for the next. Demonstrating threshold 1 does not demonstrate the claim; it removes one obstacle to demonstrating threshold 2, which in turn removes one obstacle to demonstrating threshold 3. This creates a sequential dependency bottleneck: evidence on threshold 2 cannot be gathered until threshold 1 is achieved; evidence on threshold 3 cannot be gathered until threshold 2 is achieved. The record will therefore remain in ESCALATING for threshold-1 evidence for an extended period before threshold-2 evidence begins to accumulate. The bottleneck is structural — it is a property of the claim's architecture, not of any specific technical difficulty.

First plant-level net electricity demonstration. The specific event that would transition this record from ESCALATING toward RESOLVING is a demonstration of net electricity at the plant level — Q > 1 relative to all energy inputs, with the excess delivered to the grid. This is expected to occur, if at all, in a private or public demonstration plant in the 2030s. It would satisfy threshold 1 and open the evidential path to thresholds 2 and 3. The attractor is clearly defined, practically anticipated, and the primary evidence target for this record's near-term development.