400 kg of debris dropped onto 2 fuel assemblies in Reactor 3 pool / State of fuel unverified yet – Photos
Following up this article..
Tepco dropped a major piece of debris into Spent Fuel Pool of Reactor 3 [URL]
A major piece of debris was dropped into SFP3 while they were removing debris from the pool, according to Tepco.
The dropped debris was the operation desk of the refueling machine.
Around 12:45 of 8/29/2014 (JST), Tepco attempted to grab the operation desk by an unmanned crane, but they dropped it to the middle eastern side of the pool.
The ambient dose near the pool remains 3.2 mSv/h, which is not changed after the accident, Tepco announced.
At this moment, Tepco is investigating the state of the pool.
From Tepco’s follow-up report, the dropped debris weighs 400kg. It fell onto 2 fuel assemblies.
In order to analyze the radioactive density of the pool water, they stopped the pool’s coolant system for 2 hours, which increased the temperature from 28.4℃ to 35.5℃. Tepco doesn’t report anything about the state of pool, but this means the pool temperature didn’t take longer than 2 hours to increase by 7℃. It would reach the safety limit of 65℃ only within 9 hours without coolant system.
Cs-134/137 density of the pool water was 1,020,000,000,000 Bq/m3. It sounds extremely high but Tepco states it is not showing any significant change.
↓ Photo in the pool taken by an underwater camera
↓ Before the crane drops the debris
↓ Dropping the debris
↓ Dropped the debris
http://photo.tepco.co.jp/date/2014/201408-j/140829-01j.html
http://www.tepco.co.jp/nu/fukushima-np/handouts/2014/images/handouts_140829_05-j.pdf
http://www.tepco.co.jp/cc/press/2014/1241158_5851.html
Iori Mochizuki You read this now because we’ve been surviving until today.The post 400 kg of debris dropped onto 2 fuel assemblies in Reactor 3 pool / State of fuel unverified yet – Photos appeared first on Fukushima Diary.
Source: http://fukushima-diary.com/2014/08/400-kg-debris-dropped-onto-2-fuel-assemblies-reactor-3-pool-state-fuel-unverified-yet-photos/
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