Fukushima Unit 4 Log
November 2013
May 2013
Video of spent fuel pool 4 shows debris blocking circulation. While it is not a mass of rebar and horror like pool 3 where the crane eviently fell in, the edge of one rack is missing, and a lonly fuel rod which does not appear to be in a rack has it's handle bent, and turned 90 degrees from all the other fuel rod structures.
Date unknown, roof of unit 4 has been removed, and floor is being cleared of debris with orange crane. Yellow object is reactor cap., crane is over the reactor opening, the green gantry is over the spent fuel pool
Shows roof in the process of being removed
view looking north at south side showing big hole in 3rd floor, roof structure about half removed.
4/2012
http://enformable.com/2012/04/tepco-to-begin-operations-to-prepare-for-spent-fuel-removal-at-reactor-4/
http://photo.tepco.co.jp/library/120423_01/120423_04.jpg
Water injection - concrete pump installed. All but two east wall panels are blown out, with extensive damage on all floors. North wall is buckled towards center to building, with a large hole on floors 2 and 3. Roof covering above gridwork has been blow off or towards the north edge of the roof. South edge of roof has been blown away, along with entire top floor vertical which is missing.
Reactors 3 and 4 after explosions and several fires. All but 5 panels of 18 (6 x 3 floors) have been blown out on the west side. Unit 3 roof has completely collapsed, including main roof crane which collapsed on top of reactor core. All west side concrete vertical pillars on refueling deck were completely blown out and fell over, not just the wall panels, indicating a much more violent explosion than either unit 1 or 4.
March 24, 2011 aerial photo taken by small unmanned drone
Reactor No 4 spent fuel Pool Exposed after explosion, steam coming out of the spent fuel pool indicating it is overheating.
An overview shows smoke rising from the interior of reactor No. 4 at the Fukushima Daiichi nuclear power plant complex in this still image taken from a March 24, 2011 handout video released on April 1, 2011. All equipment except for the green crane appear to be severely bent and damaged by a very large and powerful explosion(s).
http://www.ratical.org/radiation/Fukushima/images/111211d.html
November 2013
June 2013
This photo (date unknown) shows roof of unit 4 all cleared and construction of side structure to hold fuel removal crane
May 2013
Video of spent fuel pool 4 shows debris blocking circulation. While it is not a mass of rebar and horror like pool 3 where the crane eviently fell in, the edge of one rack is missing, and a lonly fuel rod which does not appear to be in a rack has it's handle bent, and turned 90 degrees from all the other fuel rod structures.
| status of Unit 4 operating floor including spent fuel pool 1 / 2/ 3 | 51:31 | May 7, 2011 |
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Date unknown, roof of unit 4 has been removed, and floor is being cleared of debris with orange crane. Yellow object is reactor cap., crane is over the reactor opening, the green gantry is over the spent fuel pool
Shows roof in the process of being removed
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| View looking south, spent fuel pool is at upper right, cleaned up. Main roof crane has been removed. Not sure what the green crane at north east of building is for. |
view looking north at south side showing big hole in 3rd floor, roof structure about half removed.
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| This shows how north wall was bent out. The South wall was completely blown out indicating that the explosion might have been closer to the fuel pool side of the building. |
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| View from outside of southwest wall showing how it buckled outwards |
4/2012
http://enformable.com/2012/04/tepco-to-begin-operations-to-prepare-for-spent-fuel-removal-at-reactor-4/
TEPCO released plans for workers to begin preparations for more intensive work at the Number 4 reactor. Experts around the world have warned of the extremely compromised state of the damaged building that holds over 1,500 fuel rods.
As reported last week, TEPCO will begin attaching a special crane to take the fuel out of the pool and constructing a cover to prevent the spread of radioactive materials from the building. The cover will be 31 meters long and 69 meters wide and 53 meters high.
At Reactor 1 the cover was constructed to enclose the entire reactor building, however at Reactor 4, the structure will cover only the upper part of the pool for the reactor.
The cover is expected to be completed by autumn next year. Spent nuclear fuel will then be removed from the pool and stored on the plant compound.
Note: 11/2013, they were actually preparing to remove fuel by November of 2013, pretty much on schedle, and the finished project looks like the diagrams)
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| Inspection of reactor core pool |
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| Inspecting spent fuel pool with plastic cover |
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| Putting cover on spent fuel pool, roof still overhead |
Water injection - concrete pump installed. All but two east wall panels are blown out, with extensive damage on all floors. North wall is buckled towards center to building, with a large hole on floors 2 and 3. Roof covering above gridwork has been blow off or towards the north edge of the roof. South edge of roof has been blown away, along with entire top floor vertical which is missing.
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| View of east side looking towards water, with water injection concrete pump truck |
Reactors 3 and 4 after explosions and several fires. All but 5 panels of 18 (6 x 3 floors) have been blown out on the west side. Unit 3 roof has completely collapsed, including main roof crane which collapsed on top of reactor core. All west side concrete vertical pillars on refueling deck were completely blown out and fell over, not just the wall panels, indicating a much more violent explosion than either unit 1 or 4. 
March 24, 2011 aerial photo taken by small unmanned drone
Reactor No 4 spent fuel Pool Exposed after explosion, steam coming out of the spent fuel pool indicating it is overheating. 
In this Thursday, March 24, 2011, photo available Friday, April 1, 2011, inside of the Unit 4 at the Fukushima Dai-ichi nuclear power plant is seen in Okumamachi, northeastern Japan. Steam comes out of debris by a crane device, in green, at the unit.
An overview shows smoke rising from the interior of reactor No. 4 at the Fukushima Daiichi nuclear power plant complex in this still image taken from a March 24, 2011 handout video released on April 1, 2011. All equipment except for the green crane appear to be severely bent and damaged by a very large and powerful explosion(s).http://www.ratical.org/radiation/Fukushima/images/111211d.html
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| View of southwest corner showing green sfp crane, and bowed out section of south wall that was not blown out. |
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