J & J Ranch, Stone Mtn, GA

Nuclear Safety In The Age Of Chernobyl And Fukushima, website of Ulrich H. Kurzweg, Professor Emeritus in the Department of Mechanical and Aerospace Engineering at the University of Florida, December 10, 2013 (emphasis added): The recent nuclear accident at Fukushima in Japan has focused the world’s attention on the safety of nuclear power… The worry at Fukushima at the moment is… some of the cores melting through their concrete supports to come in contact with the aquifer… The accidents at Chernobyl and Fukushima are indicating that we can expect such accidents to occur once every few decades or so and this will continue unless one comes up with safer reactor designs.

Professor Michio Kaku (Ph.D. in nuclear physics from UC Berkeley and protégé of Edward Teller the ‘father of the H-bomb’), Library of Congress Science Pavilion of the 2014 National Book Festival, CSPAN, August 30, 2014 (at 27:00 in): At Fukushima in Japan we have a raging nuclear meltdown, three of them — simultaneously — going on even as we speak. Even as we speak, they still have not yet gotten control of three melted cores.

See also: Nuclear Expert: We believe molten fuel already melted through floors of Fukushima reactor buildings, or is still in process of melting through (AUDIO)

And: Scientist: Fukushima nuclear fuel “still melting down… there’s melting happening in the cores” (VIDEO)

Watch Kaku’s presentation here