Fissile Fuel Cell Engine

A Fissile Fuel Cell Engine is essentially a Fuel Cell Engine designed specifically and exclusively to work by producing electrical energy from the thermal output from radiactive decay of high energy elements, such as atoms of Plutonium.

Fissile Fuel Cell Engines are rare due to the nature of this type of fuel, that normally has to be artificially enriched beforehand.

Rules
They are very fuel efficient and don't explode, but are expensive.


 * The Tech rating of this device is C (one lower than Fusion Engines). Some ancient variants of this engine were made in the late 20th and early 21st century, making those Primitive Tech.
 * Fissile Fuel Cell Engines occupy 1 less critical slot compared to a Fusion engine (minimum 1 critical slot).
 * Fissile Fuel Cell Engines need 2 heatsinks. They come integrated in the case of vehicles.
 * Fissile Fuel Cell Engines don't have a conventional "fuel tank" that can be critted.
 * Plutonium cells give 3000 km of operative range each.
 * The engine comes with space for 1 cell by default. Extra cells can be added to a design, occuping 1 extra critical slot and weighting 10 percent of the engine weight. Additional cells must be fitted in the same section as the engine.
 * Fissile Fuel Cell Engines are, on base, 15% heavier than conventional Fuel Cell Engines.
 * Fissile Fuel Cell Engines are 20% more expensive compared to conventional Fuel Cell Engines.
 * Fissile Fuel Cell Engines require power amplifiers to work with high-energy weapons (unlike Fission Engines), since radiactive materials decay slowly with low energy output, and this is not a reactor.