To be clear this is Unit 3, not the same reactor that blew up previously (Unit 1). Though dramatic, these are NOT nuclear explosions but hydrogen explosions tha

To be clear this is Unit 3, not the same reactor that blew up previously (Unit 1). Though dramatic, these are NOT nuclear explosions but hydrogen explosions that result from venting steam from the reactor. The primary containment and the reactor pressure vessel remain intact. Tepco (the Japanese utility) previously warned that this might occur to Unit 3.