Friday, June 10, 2011

#Fukushima I Nuke Plant Reactor 3 Bldg Has Over 6,400 Tons of Contaminated Water

What a surprise.

Workers braved the high radiation (up to 100 millisievert/hour) in the Reactor 3 reactor building on June 9 and found water in the basement. TEPCO says it expected to find water there, but didn't bother to tell us until the water was actually found.

Have I seen this before? Yes, the Reactor 1.

To state the obvious, if there's water in the basement of the reactor building, that means 1) the Reactor Pressure Vessel (RPV) is broken; 2) the Containment Vessel is broken.

The only question is: Where's the corium?

From Asahi Shinbun (10:45PM JST 6/10/2011):

東京電力は10日、福島第一原発3号機の原子炉建屋地下でたまり水を確認したと発表した。東電は原子炉を冷却する注水量などから、5月末現在で6400トンの水がたまっていると推計していたが、実際に存在が確認された。

TEPCO announced on June 10 that they confirmed the presence of water in the basement of the Reactor 3 reactor building at Fukushima I Nuclear Power Plant. TEPCO had estimated that 6,400 tons of water would be in the basement as of the end of May, based on the amount of water injected into the RPV. Now its existence has been confirmed.

 東電によると、9日に作業員が原子炉建屋内に入り、1階から地下に行く階段を下りて、水がたまっているのを確認した。地下の床から5.8メートルのところまで水が来ていたという。量は東電の推計よりやや多い模様。水の近くの放射線量は毎時51ミリシーベルトだった。

According to TEPCO, workers entered the reactor building and descended the stairs from the 1st floor to the basement, and saw the water. Depth of the water was 5.8 meters [19 feet] from the basement floor, and the amount of water looked to be slightly more than TEPCO's estimate. The radiation level near the surface of the water was 51 millisieverts/hour.

 1号機同様、炉心溶融によって原子炉圧力容器が破損し、水が外に漏れ出している可能性があるという。近く、水を採取して放射性物質を調べる。

According to TEPCO, it is possible that the RPV has been damaged by the core meltdown, leaking the water. TEPCO plans to test the water for radioactive materials.

 1階を確認したところ、計器盤の扉がゆがんだり、はしごが上層階から落下したりしていた。また、機器の一部がすすのようなもので黒くなっていた。東電によると、水素爆発の影響とみられるという。

Survey of the 1st floor found distorted doors of the instrument panel and a ladder dropped from the floor above. Part of the equipment was blackened with what looked like soot. TEPCO thinks they were caused by the hydrogen explosion.

4 comments:

netudiant said...

Surely these measures are irrelevant.
There is a massive lake of water in the facility, over 100,000 tons of it.
There is enough damage that we can assume that all the lower levels are interconnected. o there may be 7000 cubic meters worth of space in the building 3 basement, of which 6400 are occupied by water, so we can conclude that we are at 90% of capacity before the system overflows. We may be much closer, because we know nothing about the other buildings in the complex.
However, because we do not know where the overflow is closest to taking place, we cannot even opine on whether TEPCO's June 25 deadline is optimistic or conservative.

Anonymous said...

No mention about cooling the #3 fuel pool because it's not there anymore. It was all blown sky high into the atmosphere on March 14th. One less thing for Tepco to have to worry about now.

Anonymous said...

No mention of the spent fuel pool, and the Reactor Pressure Vessel cap is in the wrong place in the building remains, a place where it is never found even during maintenance.

the pressure cooker 'popped'

Lucy said...

I like to make friends with you,haha.


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