To make up for my downtime- here is a showcase of the reactors for my mod Red Alert Zero.
The Allied Cold Fusion Reactor has a simple function- adjacent structures are slightly enhanced in their performance. Meaning a barracks will train a tiny bit faster, a factory will make vehicles faster, a Conyard will build faster- and another Cold Fusion Reactor will generate slightly more power. The benefit stacks a couple of times per reactor (and two reactors mutually benefit from the other). This benefit carries over during a power failure- slightly enhancing the output of a structure to greater levels than it normally would during an outage.
The Tesla Reactor's special perks lie in its ability to interact with other Tesla-powered units;
1- if you send Tesla Troopers inside, their portable reactors will give a slight boost to the overall power output.
2- any nearby Tesla Coils are boosted by having their shots bounce onto a second target (or third if there are two reactors). However, the effect-radius of the reactor is very small, so it has to be very close indeed.
Note that when the Soviet Commander builds a Nuclear Physics Lab, all Tesla Reactors are automatically upgraded with Plutonium cores and will generate far more power each.
The design of both of these were to first capture the basic silhouette of the old Red Alert 2 reactors, and then incorporate some extra details;
The Allied Reactor is based upon real prototype fusion reactors (which are essentially a big donut with a chimney), while the Soviet Tesla Reactor is going for a more 'classic' style of a dynamo reactor and tesla details.
Gameplay-wise, I wanted both teams' reactors to actually do something useful aside from generate power, (especially the Soviets, who render Tesla Reactors obsolete when they build their first Nuclear Reactor). At the same time, I thought it a nice compromise that both reactors could only achieve this by being positioned in a horribly unsafe position;
-If the Soviets want their Tesla Coils to do more damage, they have no choice but to place their reactors close to the front-lines.
-If the Allies want extra base output, they have no choice but to cluster their reactors together with other vital structures, risking losing several at a time if they are struck by an area-effect attack or raid.