The Burner Safety Case

A small tritium inventory, no disruptions, low activation, and benign fault modes make the burner's safety profile inherently modest.

Inherent, not bolted-on

The burner's safety case rests on features of the machine itself rather than on active systems alone. There is no chain reaction to run away, no high-pressure coolant driving the hazard, and a fuel choice that keeps the radioactive inventory small. The 5.44% neutron fraction and the D-3He fuel are the roots of a modest profile.

Why the profile is modest

• Small tritium inventory versus a D-T plant — the main radiological term is small
• Low activation of structures from the reduced neutron load
• No disruptions: the linear machine has no large current to terminate violently
• Benign faults: plasma dumps out the open ends into the expander

What still must be managed

Modest is not nothing. Tritium is handled with rigorous accountancy and permeation control; the neutron flux, though small, requires shielding and drives some activation; and high field, high voltage, and cryogenics each carry conventional industrial hazards managed by design. The control system enforces limits and can terminate the burn safely at any time.

The formal safety and licensing case for the burner is developed as the design matures and will be grounded in measured data from the test unit. What the architecture provides is a starting point weighted toward inherent safety — the direct result of choosing an aneutronic-dominant fuel and an open, disruption-free geometry.

Taken together, these features mean the burner's worst-case events are bounded and local rather than energetic and plant-wide, which is the property that ultimately makes siting a fusion machine next to people and critical loads a credible proposition.