Fukushima Daiichi Unit 3 Spent Fuel Pool Damage Inspection

TEPCO reported in late November on some ongoing work to inspect the remaining fuel and equipment in the Unit 3 spent fuel pool. Work took place between July and October of 2021. Part of this work included equipment in the pool classified as high radiation. This included used control rods and other high radiation equipment such as used filter canisters.

The inspection found a damaged control rod lying across a fuel rack, two damaged control rods hung in the wall rack, and damage to the rack itself. Two “dummy” fuel assemblies have damaged lifting handles and six lifting tabs on the fuel racks were damaged. Sandy debris and rust were found at the bottom of the pool, causing difficulty in examining the used filters stored in the pool.

fukushima daiichi unit 3 spent fuel pool control rod damage

 

Deformations were found on the control rod racks.

Fukushima Daiichi Unit 3 spent fuel pool control rod rack damage

 

Image of damaged dummy fuel lifting handles.

Fukushima daiichi unit 3 spent fuel pool dummy fuel lifting handles

 

Damage to fuel rack lifting handles.

Fukushima Daiichi unit 3 spent fuel pool fuel rack lifting handle damage

 

Deep sand-like debris at the bottom of the spent fuel pool where filter canisters are stored.

Fukushima daiichi unit 3 spent fuel pool filter canisters debris

 

TEPCO wasn’t able to obtain clear radiation readings due to the depth of the debris in the bottom of the pool. The highest location they were able to take a reading was near the control rod found lying across the fuel rack. That reading was 265 mSv/h. TEPCO planned to begin removing debris from the fuel rack in November of 2021. Work to remove the control rods and high-dose equipment would begin in mid-2022.

A translated version of the TEPCO report can be found here:
https://www.dropbox.com/s/z3wn2ie2y2davn3/spent_fuel_d211125_08-j_u3_translated.pdf?dl=0

The original report in Japanese can be found here:
https://www.dropbox.com/s/s1kgdpexcbxeclm/spent_fuel_d211125_08-j.pdf?dl=0

 

This article would not be possible without the extensive efforts of the SimplyInfo research team
Join the conversation at chat.simplyinfo.org

© 2011-2022 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.

Editor

Editor, SimplyInfo.org

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: