General Discussion
In reply to the discussion: Fuel rod removal: Fukushima’s most dangerous operation yields first successes [View all]FBaggins
(28,706 posts)Unit #3 had just started using MOX at their last refeuling outage... so there wasn't even any spent MOX in the #3 SFP (though there would be a little "fresh" MOX that hadn't been loaded). None of the other units had started using MOX yet - Unit #3 was one of the first in Japan (receiving the fuel in 1999 from France, but not being given permission to start using it until late 2010).
everyone keeps saying that there is MOX in that pool
"Everyone" rarely knows what they're talking about when it comes to nuclear reactors. Note that (as I said above)... all spent reactor fuel has plutonium in it... so it isn't as if there would be a big difference if there was MOX in the pool. For some reason, people latched onto that early on as something else to fear about Fukushima when it really didn't matter a bit (MOX behaves in essentially the same way as other fuel rods during a meltdown).