[Column] Summary of Fukushima situation – Why is groundwater the problem ?
Posted by Mochizuki on August 30th, 2013 · No Comments
International media came back to Fukushima. It’s because of the sea contamination issue. Like I explained before, the main source of sea contamination is the groundwater. Why they can’t stop it and what are they doing ? I would like to explain before the next bus comes.
1. What makes groundwater the problem ?
Since before they built Fukushima nuclear plant, tones of groundwater went through the potential plant area to the sea. Now everything that touched Fukushima plant gets contaminated. Groundwater is not the exception.
2. How are they treating it ?
A part of the groundwater flows into the plant buildings. It is collected and kept in the tanks, everyday. The rest of water is flowing to the sea. Some of it is stopped by the wall, but because it nearly caused flooding in the plant area, now it’s pumped up and stocked in the tanks too. This is why Tepco needs the infinite amount of the tanks.
3. Is there any way to stop it ?
The answer is No. There is no technology. Now Tepco is planning three countermeasures. One is to pump up the water upstream before contaminated, they say and the second is to freeze water before contaminated, they say. The third is to purify the stocked water to discharge to the sea.
However the first one would gather more groundwater, so it’s meaningless. The second one has never been tested for the feasibility. About the third one, the purifying facilities got disordered in the test operation for unknown reason.
I don’t want you to be angry at me saying this. This is the reality whoever explains it.
56,000,000,000 Bq/m3 of Cs-134/137 from the retained water of reactor3
Posted by Mochizuki on August 30th, 2013 · No Comments
According to Tepco, extremely high level of Cesium-134/137 is still measured in the retained water of reactor3 building.
The reality is the state of reactor3 is still unknown though it’s been 2.5 years since 311.
The retained water is assumed to be the mixture of the coolant water and the groundwater.
The sampling date was 8/22/2013. Cs-134 level was 17,000,000,000 Bq/m3. Cs-137 level was 39,000,000,000 Bq/m3.
From the sample taken on 2/14/2013, Ce-134 density was 24,000,000,000 Bq/m3. Cs-137 density was 45,000,000,000 Bq/m3.
Even though 6 months have passed, Cs-134/137 density is still in the high level.
Tritium and Sr-90 detected outside of Fukushima nuclear plant port
Posted by Mochizuki on August 30th, 2013 · No Comments
According to Tepco, Tritium and Strontium-90 were detected in the outside of Fukushima nuclear plant port.
The sampling date was 7/15/2013. The analysis result hasn’t been published for over a month.
The readings are 5,500 Bq/m3 of Tritium and 1,200 Bq/m3 of Strontium-90.
These were detected in the north side of reactor5&6 water outlet.
From the sampling of 8/19/2013, all β nuclides (including Sr-90) was lower than the detectable amount. Tritium density was 4,700 Bq/m3 on 8/12/2013.
The radiation level in the seawater is increasing regardless of the impervious walls, and apparently it’s spreading out of the port.
↓ The sampling area is in the purple circle
Ag-110m detected from 8 of 8 crab samples from 20km radius area of Fukushima nuclear plant port
Posted by Mochizuki on August 30th, 2013 · No Comments
↑ Ovalipes punctatus [Wikipedia] (This is not the issued sample)
According to Tepco, radioactive silver Ag-110m (half-life 250days) was detected from 8 of 8 crab samples. The crab is Ovalipes unctatus. The highest reading was 9.0 Bq/Kg.
The sampling place was 20km radius area around Fukushima nuclear plant port. The sampling dates were from this April to May.
Though the boiling point of Ag-110m is 2,164℃, it’s still detected in the gas of reactor1 and 3.
(cf, Ag-110m detected from gas sample of reactor1 and 3, “The boiling point is 2,164℃” [URL])
Ag-110m is spreading to the sea and taken by marine creatures.
[300m3 leakage] Did the leakage really stop ? / All β density jumped up 6 times much in the near drain
Posted by Mochizuki on August 30th, 2013 · No Comments
About the 300m3 leakage of contaminated water, the main nuclides density in the leaked water – All β are increasing in the near drain according to Tepco though the leakage was supposed to stop.
It was 86,000 Bq/m3 on 8/26/2013. It became 210,000 Bq/m3 on 8/28/2013 and it reached490,000 Bq/m3 on 8/29/2013.
The drain is connected to the sea. The measurement point is in the South of the leaking tank, where is the opposite side of where the leaked water flowed.
Cs-134/137 level in the groundwater of the seaside of reactor2 increased 6 times much as 10 days before
Posted by Mochizuki on August 30th, 2013 · No Comments
According to Tepco, Cesium-134/137 density in the groundwater marked the highest in seaside of reactor2.
The sample was taken from one of the borings in the area surrounded by the impervious walls.
Cs-134 density was 13,000 Bq/m3, Cs-137 density was 31,000 Bq/m3.
The past highest readings were 3,200 Bq/m3 of Cs-134 and 4,300 Bq/m3 of Cs-137 measured on 8/19/2013.
The main nuclide in the groundwater used to be Tritium. It is not known why Cs-134/137 density is increasing.
[Column] Summary of Fukushima situation – The difference among contaminated water, groundwater and sea contamination
Posted by Mochizuki on August 30th, 2013 · No Comments
The contaminated water situation is getting increasingly complicated. I think some people are too busy to follow up. Here I’d like to summarize the situation short so you can read it before the next metro station.
■ The difference among contaminated water, groundwater and sea contamination.
1. Contaminated water
Contaminated water comes from the coolant water because the buildings are crippled. It’s retained in the building, tanks, and the trenches underground. It keeps increasing and Tepco is building the storage tanks in a hurry. Some of the tanks had leakage recently.
Contaminated water comes from the coolant water because the buildings are crippled. It’s retained in the building, tanks, and the trenches underground. It keeps increasing and Tepco is building the storage tanks in a hurry. Some of the tanks had leakage recently.
2. Groundwater
Groundwater becomes contaminated groundwater when it comes close to the plant buildings. This is the main cause of the sea contamination. Tepco is also stocking this in the tanks. It’s less contaminated than (1) but the volume is huge. It’s overflowing to the sea, flowing into the plant buildings to overwhelm the storage capacity, and also coming up to the ground surface near the seaside. (It doesn’t “leak” because it’s outside from the beginning)
Groundwater becomes contaminated groundwater when it comes close to the plant buildings. This is the main cause of the sea contamination. Tepco is also stocking this in the tanks. It’s less contaminated than (1) but the volume is huge. It’s overflowing to the sea, flowing into the plant buildings to overwhelm the storage capacity, and also coming up to the ground surface near the seaside. (It doesn’t “leak” because it’s outside from the beginning)
3. Sea contamination
Sea contamination is mostly caused by the contaminated groundwater. To know the actual sea contamination situation, they need to take samples near the sea surface, bottom of the sea, and in the middle, inside of the plant port and outside, also offshore the plant. However currently the sea contamination is not entirely researched.
Sea contamination is mostly caused by the contaminated groundwater. To know the actual sea contamination situation, they need to take samples near the sea surface, bottom of the sea, and in the middle, inside of the plant port and outside, also offshore the plant. However currently the sea contamination is not entirely researched.
and....
Bloomberg: Japan gov’t needs to understand crisis at Fukushima is a matter of life and death — ABC Interview: “They are slowly killing us… They know full well it’s leaking, but they’ve done nothing” (AUDIO)
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