Posts Tagged decontamination

福島第1、新装置「サリー」でセシウム濃度5万分の1に  :日本経済新聞

TEPCO press release Aug. 20th. Toshiba’s SARRY decontamination system, which has been plagued with problems, seems now to be working smoothly, tho not up to par: the decontamination factor is 50,000 (5 “man”), whereas the target is 1 million. It processes 25 tons/hour. By combining it with America’s (Kurion?) and France’s (AREVA) decontamination units, they can process up to 70 tons/hour. The level of contaminated water fell 51 centimetres in 24 hours.  More details in English on EX-SKF’s site, with a colour diagram of SARRY there also.

東京電力は20日、福島第1原子力発電所で19日に本格稼働した東芝の高濃度汚染水処理装置「サリー」によって、放射性セシウムの濃度が約5万分の1に下がったと発表した。目標の100万分の1を大きく下回るが、東電は「能力的に問題はない」としている。 サリーでは毎時25トンの汚染水を処理。米仏の装置と合わせると処理量は毎時70トンに達する。汚染水がたまった集中廃棄物処理施設の一部建屋の地下では、汚染水の水位は19日午後4時から24時間に51センチ低下した。

via 福島第1、新装置「サリー」でセシウム濃度5万分の1に  :日本経済新聞.

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Japan rice worries a blow to collective psyche | Reuters

The article below suggests that the recent news to test rice for radioactivity came as a shock to the nation. If so, the Agriculture, Forestry and Fisheries Ministry will have been spared the shock as they were already anticipating this in May: Experiment to decontaminate farmland begins in Fukushima I have not seen any follow-up reports on the results of this experiment. Inquiring minds would like to know.

News that local governments around Japan will test rice for radioactive caesium came as a blow that rocked the nation’s collective psyche, threatening to make its beloved traditional staple the latest in a long list of forbidden foods.

Announcement of the testing last week came amid public fears over radiation in food in the wake of the world’s worst nuclear crisis in 25 years at the Fukushima plant in northeastern Japan, with excessive levels of radiation found in beef, vegetables, tea, milk, seafood and water.

via Japan rice worries a blow to collective psyche | Reuters.

And from the Breitbart May 28th article:

The farm ministry and the prefectural government have secured 3 hectares of rice paddies, vegetable fields and grassland for the program in which they plant sunflowers and amaranths in the fields to see their capabilities for absorbing radioactive cesium in the soil, they said.

In the paddies, they will use a mineral called zeolite to see its effect in absorbing cesium in mud, they said.

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Dangers, Properties, possible Uses and Methods of Purification of radioactively contaminated (drinking) Water (e.g. in Japan) « CrisisMaven’s Blog

Reader CrisisMaven has a useful and informative post on what to do if there is radioactivity in the water you use. A big thumbs up to CrisisMaven and vielen Dank!. His native language (I believe) is German, but he has taken the trouble to translate his own articles into English. He invites readers and visitors to re-post (with attribution and link) and especially hopes that someone can translate this article into Japanese.

Most methods and tools being recommended here on the Internet such as purification by filtration will not lead to your desired result of decontaminating “radioactive water”.

a) Radioactive contamination of drinking water in Japan at this point in time can come about in only two ways:1) The source is actual surface water like lakes or rivers, possibly filtrated through river banks and thus came into contact with e.g. radioactive rain and/or dust. The Netherlands rely almost totally on water drawn from the Rhine and fed into the drinking water supply after conditioning.

2) The water may have been contaminated after production (e.g. in open cisterns/basins), which in effect is similar to bullet a1).

In all other cases it springs from groundwater (wells) and has often been concealed for years before being extracted again. As limnologists would say “groundwater” has an elephant’s memory, i.e. if you drop a can of used oil in a forest it may take ten years until you become aware of oil traces in your drinking water. This means that on one hand ground water wells should as a rule not yet show contamination from rain fall so shortly after a nuclear accident and on the other hand that when it appears further “down the road” all short-lived contamination should have decayed. This is by no means meant to downplay the issue.

So far I would have thought it unlikely to already find radioactive contamination in water that does not come from surface water or bank filtrate. If it should be true it would be alarming.

Now though, let’s assume it were true as authorities would rather hush up things than exaggerate them, thus let’s take some degree of water contamination for granted.

via Dangers, Properties, possible Uses and Methods of Purification of radioactively contaminated (drinking) Water (e.g. in Japan) « CrisisMaven’s Blog.

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