Мощное землетрясение и цунами в Японии

[Yurcha]

Из личной переписки с сотрудниками из Японии

Hey guys,

For the ones who need to calm down their parents/friends:

First good news, the wind for this week:
http://www.timeanddate.com/weather/japan/tokyo
It is not coming to Kobe for the whole week.

The dose rate in Ibaraki, 100 km in south of Fukushima is 3 micro Sv/h.
Even being exposed 5000 hr, it is still only 15mSv.

A total scanner of your body would be around 20mSv.

If the containment explodes (worst case that can be imagined), it won't be a nuclear explosion.
So not comparable to Chernobyle.
Under 50mSv, there is no proven increase of cancer risk, and even in case of explosion, in Kobe we should not at all get over this dose...
This adding to the fact that anyway the wind is with us...

I hope it may help to make your familly a little more relax about this.

Yves

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On Wed, Mar 16, 2011 at 11:31 AM,XXX

Hi everybody,

I know you haven't heard from me in a little bit and I apologize for that. I have been busy reassuring family/friends of my situation here. Everything in Kobe and all of the unaffected parts of Japan is business as usual. There are no food/water/medical supply shortages here.

Anyway, please see the below email/links I sent out to friends about the effects of the radiation release from the Fukushima-2 explosion on the 15th morning. You guys are all in the industry and you already know most of this stuff, but it may still reassure you.

Urmi

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Hi all,

In case you're somehow not sick of my explanatory emails by now......;-)
I just wrote the one below to my dad explaining the radiation dose effects of this morning's explosion at Fukushima Unit 2.

Just thought I'd pass it along to you guys as well, in case you're interested.

It is important to note that radiation levels are falling. A changed wind direction dispersed radiation away from the land and back over the Pacific Ocean (don't worry west coasters you'll be fine).

Urmi

---------- Forwarded message ----------


Yes, the Fukushima Unit 2 reactor did experience an explosion early this morning (3/16) and yes there was radiation release.

The radiation reading at 8:31am (local time) was 8,217 micro Sv (~ 8.2 milli Sv ~ 0.0082 Sv) an hour right outside of the plant. Right now (5:55pm local time) the top of the active fuel rods are submerged in water (the most important thing). As a result of the core water level being above the top of the active fuel there has been no reports of core melt in Unit 2 and the radiation levels have since come down to a level that is not adverse to the human population.

The following link is from the Center for Disease Control (CDC) radiation measurement fact sheet: http://www.bt.cdc.gov/radiation/pdf/measurement.pdf

and to get an idea of how much radiation results in physical symptoms please see this link (from Merck): http://www.merckmanuals.com/professi...17/ch317a.html

To take an example from the above Merck link: after someone is dosed with 1.0-2.0 Sv for a continuous 24 hours straight there is a 5-50% chance of that person experiencing nausea and vomiting 2-6 hours after being exposed.

What is important to realize is that yes, the radiation dose at Fukushima-2 was higher than normal and higher than the Japanese industry limits, but not high enough to cause serious damage. (industry acceptance limits are always set low for just this reason, the reason being that there has to be enough safety margin so that there is time to mitigate the problem before it gets even worse.)

I hope that assuages your fears about radiation exposure in Japan and the North American west coast areas.

[Yurcha]

[3:01 p.m. ET Wednesday, 4:01 a.m. Thursday in Tokyo] Concerned about potential radiation exposure, the U.S. military will not allow troops to get within 50 miles of the damaged Fukushima Daiichi nuclear plant, Col. David Lapan, a Pentagon spokesman, says.

Earlier, the U.S. Embassy in Tokyo said it was recommending as a precaution that Americans who live within 50 miles (80 kilometers) of the plant evacuate or take shelter indoors. This is a break from the recommendation by the Japanese government, which has told people at least 20 miles away from the damaged reactors to evacuate.

Developments at the Japan nuclear plants continue to dominate media coverage of the earthquake and tsunami disaster in the country. The situation is a very serious one, and will remain serious for the foreseeable future. Unfortunately, some of the reporting and commentary that we have seen thus far has been inaccurate and, in certain cases, wildly sensational.

Such media coverage can be disheartening and, I can tell you from a personal perspective, downright frustrating (c)

[Винни1]

Although the reactor containment building at Unit 4 was damaged, the primary containment vessel remains intact.

Юрча, кого слушать, тебя или Юкио Едано?

"...At a news conference, Japan's top government spokesperson Yukio Edano said the containment vessel of one of the reactors at the plant may have been damaged, possibly sending radioactive steam into the atmosphere.

"A part of the containment vessel is broken and it seems like the vapour is coming out from there. (It) appears to be that vapour is coming out from the broken part," Edano said, explaining that the ongoing effort to spray sea water onto the reactors was disrupted by the approximately hour-long withdrawal...."
http://www.ctv.ca/CTVNews/CanadaAM/2...-plant-110316/

[Yurcha]

Юрча, кого слушать, тебя или Юкио Едано?

"...At a news conference, Japan's top government spokesperson Yukio Edano said the containment vessel of one of the reactors at the plant may have been damaged, possibly sending radioactive steam into the atmosphere.

"A part of the containment vessel is broken and it seems like the vapour is coming out from there. (It) appears to be that vapour is coming out from the broken part," Edano said, explaining that the ongoing effort to spray sea water onto the reactors was disrupted by the approximately hour-long withdrawal...."
http://www.ctv.ca/CTVNews/CanadaAM/2...-plant-110316/

Почитай внимательно, что я написала, никто не говорит, что там нет утечки радиации. The reactor has 2 containment vessel - primary and secondary.

The primary contaiment vessel is a 6-8 feet thick concreet wall! and it was not damanged, it cannot be damaged. В Чернобыле его просто не было.

P.S. Secondary containment is a contaiment building. В новостях, как обычно, слышат звон и не знают где он :(

[Винни1]

Почитай внимательно, что я написала, никто не говорит, что там нет утечки радиации. The reactor has 2 containment vessel - primary and secondary.

The primary contaiment vessel is a 6-8 feet thick concreet wall! and it was not damanged, it cannot be damaged. В Чернобыле его просто не было.

Все, понятно сейчас.

[Aurbo]

[Yurcha].спасибо за инфо. Я понимаю,всё не так плохо,но тем не менее - какой дозметр нужен среднему гражданину,что знать - где"грязно",а где нет? Просто для информцаии, для моего образования...Спасибо.

[Дядя Саша]

concreet

Это голландское слово, означающее "конкретный". Инфа 100%.

[Yurcha]

[Yurcha]

Это голландское слово, означающее "конкретный". Инфа 100%.

:rolleyes:

[Винни1]

Купи whole body contamination monitor, it is the most accurate one

Залезешь во внутрь, прижмёшься лицом к стенке, потом спиной. Он выдаст найболее точный результат

Будет шикарно смотреться в гостиной.
А залезать в одежде можно или раздеваться надо? :sfs: