Chernobyl disaster and cloud seeding

While reading about the Chernobyl I came across this:

"Russian military pilots seeded clouds over Belarus after the Chernobyl disaster to remove radioactive particles from clouds heading toward Moscow.[33] At the July 2006 G8 Summit, President Putin commented that air force jets had been deployed to seed incoming clouds so they rained over Finland. Rain drenched the summit anyway.[34] In Moscow, the Russian Airforce tried seeding clouds with bags of cement on June 17, 2008. One of the bags did not pulverize and went through the roof of a house.[35] In October 2009, the Mayor of Moscow promised a "winter without snow" for the city after revealing efforts by the Russian Air Force to seed the clouds upwind from Moscow throughout the winter."

Do you think the US is doing the same thing right now and explain some of the record setting rain we have been seeing? I know this might be out of your area of expertise, but I found it very interesting.

Also, I would be interested in hearing your opinions on the rating of the disaster as a level 5 or 6 event on the International Nuclear Event Scale. If Chernobyl was a level 7 disaster with 1 reactor and 180 tons of fuel, why is Fukushima a level 5 or 6 with 4000+ tons of fuel and 4 reactors (of which several are probably damaged at this point)?