[Nobel_1]

Re: explosion

Several experts report the explosion was from high pressure steam and hydrogen when pressures in the secondary containment at unit 1 reached 840 kPa (122 psi).

See “Forensic Analysis Of Events At Fukushima Nuclear Plant
“ in parallel post at http://www.freerepublic.com/focus/f-news/2687850/posts

[ZX12R]

Several experts report the explosion was from high pressure steam and hydrogen when pressures in the secondary containment at unit 1 reached 840 kPa (122 psi).

Thanks, Nobel_1. I wonder if that was the estimated/expected breach pressure, for the secondary containment?