Thermal Management & Heat Rejection

Waste heat from shielding, structure, and auxiliaries is collected and rejected to the environment through the plant's cooling systems.

Even with direct energy conversion, Aegis produces waste heat: neutron and gamma energy deposited in shielding and structure, resistive losses in current leads, and auxiliary loads. Thermal management collects this heat and rejects it to the environment while holding components within their temperature limits.

Heat sources

• Neutron and gamma heating in the shield (5.44% neutron fraction)
• Resistive dissipation at current leads and warm-to-cold transitions
• Power-electronics losses in the conditioning chain
• General auxiliary and house loads

Rejection method

Heat rejection can use dry cooling, wet cooling, or a hybrid, chosen at site selection based on climate and water availability. Dry cooling reduces water use and plume signature — valuable for a low-signature fixed installation — at the cost of larger heat-exchanger area. The method is fixed early because it drives site footprint and layout.

Temperature control

Each cooled subsystem has a control loop that holds it within limits across load and ambient swings. The shield-cooling loop is safety-relevant: it must remove decay and residual heat even during shutdown, so it is backed by emergency power and passive margins where practical.

Thermal loads are computed at design stage from the frozen machine; the plant is not yet built.