Source: NRC’s Operation Center Fukushima Transcript
Date: March 16 2011
CHUCK CASTO [Deputy Regional Administrator]: [...] if we end up with a molten core and then you talk about the time for the concrete to disassociate, you know, that NUREG says it’s a couple of inches an hour, you know. And, of course, that Mark 1 containment is the worst one of all the containments we have, and it’s literally, you know, this NUREG tells you that in a station blackout you’re going to lose containment. There’s no doubt about it.
But, anyhow, I just would highlight that that is a valuable resource, that NUREG. I think it’s — is it 6150, CR-6150, Perspectives on Nuclear Safety? It completely walks all of this down. It’s already been thought out. It’s already been reviewed, looked at, modeled, everything. So, the one thing the NUREG doesn’t really do is tell you how to stop it, how to mitigate it, other than keeping water on it. But the Lab may have some recommendations.
NUREG/CR-6150, Vol. 2, Rev. 2 INEL-96/0422 Modeling of Reactor Core and Vessel Behavior During Severe Accidents: http://pbadupws.nrc.gov/docs/ML0103/ML010370328.pdf
Published: March 1st, 2012 at 2:23 am ET
- Analysis: Melted fuel completely penetrated concrete in under 15 hours at GE Mark I — Shows little decline in speed (CHART) March 17, 2012
- IAEA Paper: Corium was not cooled in majority of tests using water injected from above, as done at Fukushima — Were studying how to stop molten core from melting through concrete December 26, 2013
- AP: Melted Fukushima fuel is 12 inches from entering ground after eating through concrete, says simulation — Study: Molten core suspected of eroding through concrete foundation — Gov’t Expert: We just can’t be sure until actually seeing inside November 20, 2013
- Gov’t Experts: Fukushima fuel rods were melting 75 minutes after tsunami; Reactor core not covered with water 10 minutes after power blackout — Worker: Before explosion, Unit 1 “filled with what looked like steam or dust… a series of large bangs… noise never heard before” (VIDEO) August 16, 2014
- Reporter: Many experts now believe Fukushima’s melted fuel burned through the concrete floors and has gone down into the groundwater — “No one yet knows how deeply those 3 cores melted into the ground… No one knows where the cores are” (AUDIO) May 12, 2016