That area was called “Whoops” for a reason.
WPPSS (WHOOPS) was a private entity set up by the state to develop 5 commercial reactors. Plants 1,2, & 4 were to be located on the Hanford Reservation and Plants 3 & % were to be located at Satsop near Aberdeen. They went bust and only completed Plant #2.
The building in this story was shut down a number of years ago and was constructed for the purpose of extracting plutonium from spent fuel rods from the government owned N Reactor. It was not a nuclear reactor.