Patterson Pattern Predator: twin sinks.

This peeking shot shows the pair of turbine sinks. They don't dispel heat but, rather, offer a step between the unique fission-level heat of the metal exchange and the relative ice-cold environment of the promethium combustion area. This -interim- supercritical de-heating allows excited plasma to separate from solid particles. Once decoupled the plasma is shunted over the atomic fuel to regulate output via coils. Then the plasma is re-married with the metal which has been re-heated via atomic exchange. Secondary blowback tubes divert spare plasma to exposure loops within the combustion chamber which serves as the spark, completing the reciprocal 'Triplex Drive'.