There are no nuclear plants along the Northwest coast.
http://walrus.wr.usgs.gov/tsunami/cascadia.html
Rather, geologic evidence is accumulating that the Cascadia subduction zone is poised between major earthquakes. Therefore, the possibility exists that local tsunamis may someday accompany a major earthquake along the Cascadia megathrust. Some Native American tribal nations in the Pacific Northwest have legends of large waves striking the coast. Do these legends refer to tsunamis?
We are due another one.