Fairewinds Chief Engineer Arnie Gundersen, Nov. 19, 2013 (at 7:00 in): Modern fuel racks have boron surrounding the nuclear fuel, and the boron at Fukushima Daiich likely leached out over the last 2 years […] If the fuel gets too close to each other it can cause a chain reaction in the fuel pool.
Chris Harris, former licensed Senior Reactor Operator and engineer, Nov. 21, 2013 (at 34:45 in): You can have occur a complete criticality in the spent fuel pool. If you imagine the whole spent fuel pool boiling away at one time, a dazzling display of light, […] involvement where the fuel itself gets damaged, liberating hydrogen, getting contained inside the new building that they have, and that exploding. I almost believe that would be close to, or indistinguishable from, a nuclear explosion from a practical standpoint.
Published: November 22nd, 2013 at 11:09 am ET