A 40 MW reactor is too tiny for any real electricity production and the use of D2O as a moderator allows the fuel to have a lower enrichment than is needed for a H2O moderated reactor (and in some cases no enrichment is needed). I’d be curious about the design of the reactor. If it is set up for rapid defueling/refueling (perhaps even while online) then it would be an excellent plutonium production reactor. When you produce plutonium you build up the levels of plutonium in your fuel assemblies to an equilibrium so you need to cycle out your fuel assemblies often to maximize the amount of plutonium that you can produce for a given amount of fuel and time. The fact that Iran is using D2O moderated reactors is very troubling.