Title: Hydrogen leak leading to Fukushima Unit 1 explosion caused by earthquake impact
By: Nuclear Regulatory Commission
Date: March 12, 2011
[...] It was reported at 15: 35 that the Reactor Building of 1F1 was ruptured after a rather strong earthquake with the sound of explosion and that the level of radiation at the site boundary was suddenly doubled from 500 micro Sv/hr of that after venting operation to lmSv/hr. The explosion is considered due to explosion of hydrogen leaked from the primary coolant boundary caused by the impact of the earthquake. [...]
Read the full email here
Some of the few names mentioned in the email’s ‘To’ and ‘From’ fields were US NRC Chairman Gregory Jaczko and Japan AEC Chairman Shunsuke Kondo.
Today’s Fairewinds video discusses this very topic. Gundersen believes the hydrogen escaped, not from quake damage, but from the top lifting off of the containment vessel: Gundersen: Top lifted off Reactor No. 1 containment BEFORE explosion? (VIDEO)
Published: February 9th, 2012 at 8:18 pm ET