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Thursday, August 2, 2012

Fukushima Unit 4 Welding Work Shown

Hi folks,

Fukushima Unit 4 Welding Illustration
Unit 4 workers welding illustration
Some of you who have been keeping an eye on Fukushima and the Live Cam they have, might have noticed that yesterday Tepco changed the angle of the camera. It's now located at the opposite side from where it was before with reactor unit 4 closest in view to the camera instead of unit 1.

 I've been busy with other things lately so I didn't notice the work that was going on top of reactor unit 4. FC pointed out in the chat that there was flashes going on in the bottom right corner of the screen, and sure enough when I looked at the live cam there was even workers moving around there.

Here you can see an ILLUSTRATION showing the location where the welding work is being done on top of reactor unit 4. The actual flashes where much smaller than this illustration shows but the scale of the workers to the right is about the same.

I figure the flashes was caused by the workers welding some beams, that's what it looks like to me. I tell you they better weld in some support because that 60 Ton "cover" they put in place a month ago on top of the fuel pool to an already damaged structure is not going to help the building situation.

I'm sure you already have read about what happens when that fuel pool hits the ground in the event of an bigger earthquake. The contamination released would equate to some 800-1000 nuclear weapons going off all at once.

And I hope those workers where wearing gas masks because that steel is contaminated with all kinds of radioactive particles, welding always cause smoke and people doing it for a living need regular health checkups to check their lungs.. Add radiation to that smoke and it is not going to turn out good for the workers later on.

Now the camera angle like I told you earlier is different now from what it was when the livecam  first was put into place 2011. But we can still see all the reactor units and cranes working on the site. To explain the map, Unit 4 is in the right corner of the screen and we can see part of Unit 1 way back with Unit 2 blocking most of the view (Unit 1 is the white reactor unit because of the tent they put up).

I hope this Fukushima update have shed some light on the recent developments on site.
at 1:41 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.

Fukushima

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