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Wednesday, August 24, 2011

☢ Fallout Spreading Japan Expands Search for Hotspots to 460 km From Meltdowns ☢

Related: ☢ Gundersen Radioactive Sulfur-35 = Nuclear Chain Reaction at Fukushima Daiichi Reactors ☢
☢ Tokyo Soil Contamination Map Radioactive Hotspots OVER 900.000 bq/m2 in Chiba Prefecture ☢
☢ Tokyo Radioactivity Extreme Sample Higher Than Chernobyl Exclusion Zone ☢
☢ Estimated 168 Hiroshima Bombs Nuclear Fallout from Fukushima Daiichi Nuclear Power Plant So Far ☢

Bloomberg Report:

Japan Triples Airborne Radiation Checks as ‘Hot Spots’ Spread
QBy Tsuyoshi Inajima and Yuji Okada - Aug 24, 2011 8:25 AM GMT+0300

Japan will more than triple the number of regions it checks for airborne radiation as more contaminated “hot spots” are discovered far from Tokyo Electric Power Co.’s crippled Fukushima nuclear power station.

The government said it will increase radiation monitoring by helicopter to 22 prefectures from the six closest to the plant, which began spewing radiation after an earthquake and tsunami struck the station in March. The plan comes after radioactive waste more than double the regulatory limit was found 200 kilometers (125 miles) from the plant this week.

Authorities have refused to give a cumulative figure for radiation released from the Fukushima Dai-ichi nuclear plant after estimating in June that fallout in the six days following the quake was equal to 15 percent of total radiation released in the Chernobyl nuclear disaster in 1986. The authorities have been too slow to widen airborne radiation testing, said Tetsuo Ito, the head of Kinki University’s Atomic Energy Research Institute in Osaka.

“The government should have expanded the monitoring area by helicopters much earlier to ease concerns among the public,” Ito said in a telephone interview yesterday.

Officials on Aug. 12 found compost in a kindergarten yard in Tokamachi city, Niigata prefecture containing radioactive cesium measuring 27,000 becquerels per kilogram, Kenichiro Kasuga, an official at the city’s disaster prevention department, said by phone.
Legal Limit

Under Japanese law, waste measuring over 8,000 becquerels per kilogram must be treated as radioactive waste and can’t be buried in a landfill.

City officials found sludge measuring 18,900 becquerels per kilogram from radioactive cesium on the same day as part of tests done at 60 educational and childcare facilities, Kasuga said. The city government is storing the waste in drums until the government sets final guidelines for its disposal, he said.

“We still don’t know why this level of cesium was found in the compost,” Kasuga said.

The hotspots in Niigata were likely caused by wind blowing northwest towards the prefecture in the days following the Fukushima accident, Kinki University’s Ito said.

The government will begin monitoring radiation levels in 16 prefectures from Aomori, in the far north of the main island of Honshu, to Aichi in central Japan 460 kilometers (290 miles) from the plant by the end of October, the Ministry of Education, Culture, Sports, Science and Technology said in a statement on its website yesterday.
Monitoring Radioactivity

Radiation monitoring has taken place in four other prefectures and in Gunma and the western part of Fukushima prefecture, said Hirotaka Oku, a spokesman at the science and technology ministry.

Checks in Ibaraki and Yamagata prefecture were completed in August and the findings will be released soon, he said, without specifying when.

The discovery of radiation at Niigata kindergartens coincides with the start of the rice harvest in the prefecture that was the country’s biggest producer last year with 7 percent of the total. Radiation from Dai-Ichi has already been found in food including beef, tea and spinach.

So far, early tests on rice haven’t detected radiation, Shingo Gocho, assistant director in Niigata prefecture’s agricultural division said by phone yesterday. The government is taking samples from 45 areas in 29 villages, towns and cities that make up the prefecture’s growing area, he said. The crops won’t be shipped until the results are known, he said.
Food Checks

Japan’s Ministry of Health, Labour and Welfare plans to conduct radiation checks in food produced in about 100 cities, towns and villages in 14 prefectures because local governments hadn’t tested produce by the end of July despite requests by the central government, said an official at the ministry, who declined to be identified, citing internal rules.

The central government will become move involved in testing food to ease concerns among consumers and provide more data, the official said. Radiation checks on produce including vegetables, meat and eggs will be carried out at the National Institute of Health Sciences and the findings will be released as soon as possible, the official said.

Tokyo Electric’s Dai-Ichi plant released about 770,000 tera becquerels of radioactive materials between March 11 and March 16, Japan’s Nuclear and Industrial Safety Agency said on June 6.

Japan’s government is under-reporting the amount of airborne radiation across the country, said Tom Gill, an anthropology professor at Meiji Gakuin University in Tokyo, citing his studies in Fukushima prefecture since March.
Higher Radiation

The “maximum” radiation level given for Fukushima prefecture on Aug. 13 was 2.64 microsieverts per hour in the village of Iitate 40 kilometers northwest of the Dai-Ichi plant, Gill said, according to figures from the Science Ministry published daily in national newspapers.

That compares with the official reading in the village itself the next day of 14.2 microsieverts per hour, he said, showing a picture he took of the reading on that day. He was speaking at a presentation in Yokohama near Tokyo on Aug. 19.

The government excludes the highest readings among 20 measuring stations in the village from the data it collates for publication, Gill said.

“Distrust and cynicism of central government is pretty much universal across Fukushima now,” he said.

Medical tests on children living in three towns near the plant between March 24 and 30 found 45 percent of those surveyed suffered low-level thyroid radiation exposure, Japan’s government said earlier this month.
Thyroid Cancer

Children are more susceptible to poisoning from radioactive iodine, which can accumulate in the thyroid and cause cancer, according to the World Health Organization. None of the children’s thyroid glands exceeded the safety threshold of 0.2 microsievert per hour set by the Nuclear Safety Commission of Japan, the government said at the time.

The Fukushima disaster is the worst since a reactor exploded at Chernobyl in the former Soviet Union 25 years ago. About 2 million people in Ukraine are still under permanent medical monitoring, according to the nation’s embassy in Tokyo.

A becquerel represents one radioactive decay per second, which involves the release of atomic energy that can damage human cells and DNA, with prolonged exposure causing leukemia and other forms of cancer, the World Nuclear Association says,

To contact the reporters on this story: Tsuyoshi Inajima in Tokyo at; Yuji Okada in Tokyo at

To contact the editor responsible for this story: Teo Chian Wei at

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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.