[gammagoblin]

>The headline is potentially misleading. There are already "nuclear power plants"

It is not potentially misleading. This is just you being pedantic about a connection that very few people make. When you say "nuclear power plant", people tend to think of nuclear fission reactors, not RTGs or fusion reactors. Both of these are applicable to the term "nuclear power plant", but only one is commonly referred to by the term. A lot more people would feel misled if it actually referred to RTGs when it said "nuclear power plant."

The only group that it could potentially mislead is people who know RTGs exist. Most of those people would instead think "I wonder what kind of nuclear power plant it is" instead of "wow, what a misleading headline!" unless they were intending to be pedantic (like you).