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Wednesday, August 10, 2011

TEPCO will build a Chernobyl Like Cover Over Reactors


TEPCO to begin building cover over Fukushima reactor Wed.

In this photo released by Tokyo Power Electric Co., the Fukushima Daiichi power plant's Unit 1 is seen after an explosion in Okumamachi, Fukushima prefecture, Japan, Saturday, March 12, 2011. The explosion at the nuclear power station Saturday destroyed the building housing the reactor after being hit by Friday's powerful earthquake and tsunami. (AP Photo/Tokyo Power Electric Co.)
In this photo released by Tokyo Power Electric Co., the Fukushima Daiichi power plant's Unit 1 is seen after an explosion in Okumamachi, Fukushima prefecture, Japan, Saturday, March 12, 2011. The explosion at the nuclear power station Saturday destroyed the building housing the reactor after being hit by Friday's powerful earthquake and tsunami. (AP Photo/Tokyo Power Electric Co.)
TOKYO (Kyodo) -- The operator of the crippled Fukushima Daiichi nuclear power plant said Tuesday it will begin in earnest on Wednesday work to install a giant covering over the plant's No. 1 reactor, with plans to complete it by the end of next month.
The covering, a tent-like structure made of steel frames and air-tight polyester sheets, is meant to prevent radioactive materials from spreading from the crippled reactor and stop rainwater from entering the reactor building, said Tokyo Electric Power Co.
When completed, the covering will be between 42 and 47 meters long and about 54 meters high. About 60 components are being brought to the seaside plant via the Pacific.
On Wednesday, a steel structure about 6.9 meters high that weighs about 30 tons is expected to be pulled up by a crane and installed at the southeast corner of the No. 1 reactor building.
In this June 12, 2011 photo released on July 5, 2011 by Tokyo Electric Power Co., masked workers in protective outfits prepare to drop one of sliding concrete slabs into a slit of the upper part of the sluice screen for Unit 2 reactor at the tsunami-crippled Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, northeastern Japan, in their effort to decrease the leak of radiation contaminated water to the ocean. (AP Photo/Tokyo Electric Power Co.)
In this June 12, 2011 photo released on July 5, 2011 by Tokyo Electric Power Co., masked workers in protective outfits prepare to drop one of sliding concrete slabs into a slit of the upper part of the sluice screen for Unit 2 reactor at the tsunami-crippled Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, northeastern Japan, in their effort to decrease the leak of radiation contaminated water to the ocean. (AP Photo/Tokyo Electric Power Co.)
The building housing the No. 1 reactor and those housing the Nos. 3 and 4 reactors at the plant were badly damaged due to explosions after tsunami caused by a magnitude 9.0 earthquake struck the plant on March 11.
Once the installation is completed at the reactor, Tokyo Electric will consider installing similar coverings for the Nos. 3 and 4 reactors, the operator said.
(Mainichi Japan) August 10, 2011







Read the story at The Mainichi Daily News http://mdn.mainichi.jp/mdnnews/news/20110810p2g00m0dm010000c.html
at 5:43 AM Posted by JD
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Geiger Counters - Radiation Detection Meters - Handheld Radiation Detector



When it comes to radiation detection meters you really have a wide field of gadgets to choose from, however radiation detectors are the most common to use. First of all if you need to know what type of radiation you are looking for. There are Alpha, Beta and Gamma radiation detectors. And also there is neutron emission of nuclear radiation. And all these different types of emissions have radiation detectors for a specific type of radiation that you can buy radiation detector for. Some also measure both Alpha and Beta. Others detect Alpha, Beta and Gamma. While others let you measure Beta and Gamma radiation.



What most people have use for though are Dosimeters you can buy a handheld radiation detector pretty cheap that are good addition to a survival kit. There are different kinds that you can use that will detect radiation. There are radiation badges that will tell you when radiation become high. Workers at nuclear power plants use these to inform them of how much radiation they have been exposed to. Now also children in the Fukushima prefecture have each been given a radiation badge so they know if they are exposed to radiation. Some come in the shape of a pen that you can carry in your pocket while other are made more compact so that you can attach them to your keychain. And then you have what is called a personal radiation monitor. These are also called Dosimeters and also normally called Geiger counters. Although not all use the Geiger-Muller Tube for the radiation detection some use a semiconductor instead. These and mostly the older geiger counters seen are pretty big to carry around, so they might not be best suited for a survival situation where you only need to carry the most important things. However if you have land and want to check radiation around the property and drinking water then these are the geiger counters to get because they are very well built units.

These are the once that you normally see people use. They have different units of radiation detection, because when it comes to radiation there are many standards used. some give the measurements in Rads, while other use Sieverts. Some have the maximum radiation value for the measured radioactivity quite low but they will still give you an idea of the amount of radiation in the area. With the units ranging from between background radiation 0.001 mSv/hr all the way up to 10 Sv/h. Normally a dosimeter will measure radiation in micro siverts per hour. If you were to walk into one of the reactor units at the Fukushima Daiichi Nuclear Plant you probably would get an error reading from your dosimeter because the radiation levels are so high there.

Note that some places outside the exclusion zone in Fukushima that are too radioactive for people to live in have areas where the radiation levels are above 30 Sv/h. So if you are in a area that have high radiation the radiation detectors would also there go off the scale. However Geiger counters or radiation detectors are still favored as general purpose alpha/beta/gamma portable radiation detectors and radiation detection equipment, due to their low cost and robustness. Most come with an LCD Display that show you the radioactivity in the area. Nowdays you will even get alarm sound and the possibility to connect the device to a computer. Either with a Infrared, Bluetooth or USB connection.

So if you look at the radiation detectors for sale that have this, then these radiation detection meters will allow you to make maps of contaminated areas that show where the radiation is high and low. This also will help you to see which areas are becoming more contaminated over time. With several nuclear reactors in the US and around the world located near fault zones that makes it a danger if a big earthquake would hit the area there is always a good choice to have a radiation dosimeter avaliable. I'm sure many in Fukushima would have been grateful to have dosimeters avaliable at the time of the disaster and I am sure you to would be grateful to have a geiger counter handy when you need one.

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