A series of recent inspections inside unit 1 has confirmed the extent of the damage to unit 1 and the severity of the 2011 meltdown.
The concrete pedestal base for the reactor vessel is heavily damaged with roughly 5 feet of the pedestal concrete destroyed, including at least 3/4 of the pedestal circumference. All that remains is the metal rebar. This damage includes the entire width of the pedestal wall.
The evidence found on the inspections shows a massive pile of fuel debris along with visible pieces of reactor components. TEPCO admitted that 90% of the fuel left the reactor vessel during the meltdown. Some of the distinguishable components include portions of fuel rod tubes, control rod components, and reactor instruments. These pieces fell on top of the fuel debris pile indicating some of the reactor components fell after the bulk of the molten fuel had burned through the bottom of the reactor and fallen into the pedestal.
Additional evidence of the damage to the pedestal was provided. This further clarifies the extent of the damage. The portion noted as undamaged in our diagram at the top of the article is only because TEPCO has not provided imagery for that portion of the pedestal. It may be equally as damaged as the other portions. If so this would indicate that the entire pedestal is failed, leaving only the rebar and a few upper metal attachments for the reactor vessel to the containment wall. The concrete bio-shield that sits on top of the concrete pedestal has no other support system to transfer the load elsewhere.
A translated version of the TEPCO report can be found here:
This article would not be possible without the extensive efforts of the SimplyInfo research team
Join the conversation at chat.simplyinfo.org
© 2011-2023 SimplyInfo.org, Fukuleaks.org All Rights Reserved Content cited, quoted etc. from other sources is under the respective rights of that content owner. If you are viewing this page on any website other than http://www.simplyinfo.org (or http://www.fukuleaks.org) it may be plagiarized, please let us know. If you wish to reproduce any of our content in full or in more than a phrase or quote, please contact us first to obtain permission.