NOAK Improvements
Nth-of-a-kind units apply the build and operability lessons of the first machine while holding the physics design point fixed.
What NOAK changes
The nth-of-a-kind (NOAK) units are where the program applies what the first machine taught. The physics design point, Q_sci 3.076, 85.0 MW, 16.84 T, 9.66 MA, stays essentially fixed once validated. What changes is how the machine is built and operated: faster, more reliably, and with less unnecessary instrumentation.
Typical NOAK improvements
- Shorter build than the roughly 3.5-year FOAK, from procurement and assembly lessons
- Streamlined diagnostics, keeping what proved essential at FOAK
- Improved remote-maintenance access to raise foundry availability
- Manufacturing steps standardized where FOAK was bespoke
Why the physics stays fixed
Once FOAK validates the design point at the gates, changing the physics would reopen retired risk. NOAK deliberately holds the validated physics constant and concentrates improvement on build time and operability, which is where the largest, safest gains are available after the first unit.
Retiring operability risk
FOAK retires physics risk; NOAK retires operability risk, whether the machine can be built repeatably and run at high availability as a foundry. This is the second stage of the learning curve, between proving the machine and standardizing it.
NOAK improvements describe planned second-stage units for a machine not yet built. They are informed by FOAK measurement and quality-assurance data, and they are the bridge to BOAK standardization.