Survivability and Hardening
A fixed fusion installation must be sited and hardened so that generation survives the threats a base faces, from kinetic strikes to environmental extremes.
Survivability as a design input
Survivability is the ability of the power system to keep functioning under attack, accident, or environmental extreme. For a fixed installation, survivability is designed in through siting, physical hardening, redundancy, and separation of critical elements.
What must be hardened
- The generating units and their cryogenic and control auxiliaries.
- The microgrid controller and protection systems.
- Energy storage that bridges outages.
- The helium-3 fuel inventory and handling systems.
Separation and redundancy
A single hardened unit is still a single point of failure. Survivability therefore combines hardening with separation — placing redundant units far enough apart that one event cannot take both — and with the N+1 architecture that the availability gate already requires. Hardening reduces the chance of damage; redundancy ensures the mission survives damage that occurs.
The burner's high-field magnets, cryogenics, and shielding make it a substantial, fixed structure, which is well suited to being hardened but also makes it a locatable asset. Survivability is achieved by the whole architecture — siting, hardening, separation, redundancy — not by any single measure, and is designed against the honest availability and failure behaviour of the machine.
No single measure suffices
Survivability comes from combining siting, physical hardening, separation, and redundancy; any one alone leaves a single point of failure. A hardened but solitary unit still trips and can still be lost. The architecture pairs hardening, which lowers the probability of damage, with redundancy, which ensures the mission survives damage that occurs.