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At no time has TEPCO ever reported a temperature higher than ~750 degrees F (400C), and it has more typically reported primary containment temperatures barely one third that high.
With steel being an excellent conductor of heat, it is just simply not possible for melting to occur and for the reported temperatures to have been that low. Either something as basic as temperature monitoring is out of the realm of the possible for TEPCO's engineers (with troubling implications for where we really are in this unfolding disaster), or TEPCO has been falsifying the temperature data that it has been releasing.
This, too, has troubling implications, for it means that the rest of the data - including the radiation readings and isotopes discovered - are all suspect, too. Neither bodes well, so pick your poison.
TOKYO, May 13 (Xinhua) -- A radioactive substance of up to 170,000 becquerels per kilogram was detected in incinerator ashes at a sewage plant in Koto Ward, east Tokyo, in late March, the Kyodo News Agency quoted government sources as saying Friday.
The highly-contaminated ashes were discovered following the nuclear crisis at the Fukushima No. 1 nuclear plant which escalated through March as a hydrogen explosion exacerbated the disaster and highly radioactive water was both discharged and found to be freely flowing into the Pacific Ocean.
The ashes have since been recycled into materials used for construction, such as cement, sources with knowledge of the matter said.
In addition, the sources revealed that also in late March a radioactive substance, which may or may not have been cesium, measuring 100,000-140,000 becquerels per kg, was found in two other separate sewage facilities in the Itabashi and Ota areas of Tokyo.
Separately on Friday, the local government of Maebashi, the capital city of Gunma Prefecture, said radioactive cesium of 41,000 becquerels per kg was detected in incinerator ashes collected Monday at a water sanitation facility.
This is outrageous and shocking news. First, because of the levels, and second, because these things were detected in "late March" and then hidden from the public to such an extent that the screaming hot ashes were allowed to be recycled into and used for construction materials. Now that's a cover-up.
A becquerel is one decay per second. So if you had a Geiger counter up against a radiation source that was emitting just two becquerels, you'd hear a reasonably steady tick-tick-tick-tick sound. By one hundred becquerels, you would be hard-pressed to hear the ticks as separate events - the sound would be a blurred staccato. By one thousand becquerels, it's just a squeal, and there's no point in listening anymore, as your ears are not helpful in trying to gauge the level of radiation.
Now look back at those radiation readings in the hundreds of thousands per kg. They are incredibly hot. An average brick is in the vicinity of a kilogram, so think of holding one in your hands while it emits 170,000 radioactive decays per second.
Okay, so this is a very, very hot reading.
And here's where those readings were detected:
Originally posted by makeitso
Tepco posted a pic of the U.S. Navy barge that brought fresh water, now leaving Fukushima.
It has several canvas covered objects on deck that were not there when it arrived, and its sitting lower in the water than when it arrived carrying 225000 gallons of fresh water.
Originally posted by makeitso
Originally posted by Tworide
A review of the reactor logs shows that the steam driven isolation condensers were shut down by the operators after the quake, but before the tsunami.
Documents released by Tepco Monday showed the isolation condenser— an emergency cooling system installed on Reactor No. 1 before the quake as a final resort in case of a total loss of power—worked only sporadically, if at all.
Unit 1 did not have the steam-driven vessel makeup system that was installed and used on Units 2 and 3. Unit 1 had what is called an isolation condenser to perform vessel water inventory control and vessel pressure control (see Figure 2).
The isolation condenser is a large tank of water. If the normal makeup flow of water to the reactor vessel is lost, battery-powered valves open to allow steam produced by decay heat in the reactor core to flow through thousands of tubes in the isolation condenser. That steam is condensed back into water and flows by gravity to the reactor vessel. This process controls the amount of water in the pressure vessel, since it limits the steam (and thus water) lost through relief valves to the torus (which is part of the primary containment vessel).
This process also controls the reactor vessel pressure, since the water in the isolation condenser absorbs decay heat that would otherwise cause the pressure inside the reactor vessel to rise.
But the water inside the isolation condenser is of finite volume. In less than 90 minutes after a reactor shut down from 100 percent power, the decay heat from the reactor core will have warmed that water to the point of boiling and begun to boil it away. Boiling water reactors with isolation condensers are supposed to use electric powered pumps to refill the isolation condenser tanks well before its water boils away. Workers at Fukushima had no pumps available to top off the tank after the earthquake took away the normal power supply and the tsunami took away the backup power supply.
Figure 2: A schematic showing the isolation condenser at the upper left. The blue lines show the water flow from the reactor vessel—the cylinder on the right surrounded by the inverted lightbulb shape, which is the primary containment vessel.
It’s worth noting that modeling of the crisis indicates that meltdowns should have occurred at all three reactors (1. 2, and 3), given the length of time they were all without cooling. The modeling also suggests that without cooling the molten fuel would have melted through the bottom of the reactor vessel about 7 hours after the fuel relocated to the bottom of the vessel. TEPCO says that cooling water was injected in to prevent this. According to Figure 1, the injection of cooling water started about 10 hours after the water level dropped below the bottom of the fuel in the reactor.
TEPCO Says Core of Unit 1 Melted
edit on 5/18/11 by makeitso because: (no reason given)
The Yomiuri Shimbun
Nearly two months after the start of the crisis at the Fukushima No. 1 nuclear power plant, only 10 percent of workers there had been tested for internal radiation exposure caused by inhalation or ingestion of radioactive substances, due to a shortage of testing equipment available for them.
Tokyo Electric Power Co., operator of the crippled nuclear compound, is finding it impossible to use testing apparatus set up inside the facility because of high radiation levels recorded near the equipment.
A number of personnel working to overcome the nuclear crisis at the facility are increasingly alarmed by their lack of internal exposure testing.
Some have said they may have to continue to work at the facility without knowing whether their radiation exposure levels have exceeded the upper limit set by the government.
On Tuesday, the government revealed a timetable for ending the nuclear crisis. The road map called for increased surveillance of the workers' radiation levels, including a measure requiring TEPCO to periodically report such data to the government.
Internal exposure is caused by taking radioactive substances into the body via eating, drinking or breathing. Its unit, counts per minute (cpm), indicates the amount of radiation emitted per minute.
Regulations on preventing health problems caused by ionizing radiation require operators of power plants to conduct internal exposure tests every three months on plant employees who enter areas designated by laws and regulations on radiation-related health problems.
"My measured value [of radioactive exposure] exceeded the standard value by a double-digit factor. That's never happened before," said a plant worker in his 20s, recalling the time he saw the results of a test he took outside Fukushima Prefecture in early May.
The man, an employee of a company that works with TEPCO, installed power cables near a reactor building at the plant for a month beginning at the end of March.
The test is conducted by a device called a "whole-body counter." While a normal internal radiation level would range from several hundred cpm to 1,000 cpm, he was told his level was 30,000 cpm.
High levels of radiation emitted by debris were measured in his work area.
Although the masks worn by workers are supposed to be changed every three hours, he was told by a management company that he did not have to change his if there was no radioactive contamination. He therefore used a single mask for five to six hours.
He ate in a building that houses an emergency headquarters and accommodates plant workers. At the end of April, he was notified that the building was also radiation-contaminated. "I've probably taken in radioactivity while eating," he said.
After the crisis at the plant began, the central government increased the maximum limit of radiation exposure from 100 millisieverts to 250 millisieverts exclusively for workers at the Fukushima plant. However, the amount is a total of internal and external exposure doses.
Workers can learn only their external doses via the measurement equipment they carry with them, and it is necessary to also measure their internal exposure level to verify whether their total exposure doses exceed the limit.
According to TEPCO, there are only three whole-body counters available near the plant. Some workers had to be tested as far away as the Kashiwazaki-Kariwa nuclear plant in Niigata Prefecture. As of May 8, 630 workers, or just 10 percent of all workers at the plant, had taken the test.
The Health, Labor and Welfare Ministry's Industrial Health Division has advised TEPCO to provide more tests. TEPCO has said it will increase the amount of test equipment on hand to 14 whole-body counters and will also raise the frequency of the test to more than once in three months. (May. 19, 2011)
Originally posted by Aircooled
youtu.be... Does anyone notice, the position of the cam now ?
On Wednesday, staff entered reactor buildings No. 2 and 3 to survey radiation levels for the first time since the explosions at the plant. This followed a survey at the No.1 reactor.
At the No.2 reactor they found peak radiation levels of 50 millisieverts per hour. They also experienced high humidity and intense heat, which limited the work there only to 15 minutes.
At the No.3 building the team detected 160 to 170 millisieverts of radiation per hour near a pipe connected to the reactor. The pipe was to be used to inject nitrogen to prevent a hydrogen explosion.
To improve the working conditions at the No.2 building, Tokyo Electric Power Company is planning to set up a cooling system to lower the temperature of a spent fuel pool which is causing the humidity. But the company says the system will become operational at the end of May at the earliest, and that work inside will not be possible for the time being. As for the No. 3 reactor building, the utility says they may have to find another way to inject nitrogen and also shield staff from the radiation in order to work inside. These difficulties may affect the company's road map to stabilize the reactors
Originally posted by Hellhound604
hmmm .... after speculation that Stuxnet which can control certain Siemens PLC's that might have been used at Fukushima, now this???? From Slashdot, this story :
"A planned presentation on security vulnerabilities in Siemens industrial control systems was pulled Wednesday over worries that the information in the talk was too dangerous to be released. Independent security researcher Brian Meixell and Dillon Beresford, with NSS Labs, had been planning to talk Wednesday at a Dallas security conference about problems in Siemens PLC systems, the industrial computers widely used to open and shut valves on factory floors and power plants, control centrifuges, and even operate systems on warships. But the researchers decided to pull the talk at the last minute after Siemens and the US Department of Homeland Security pointed out the possible scope of the problem."
hmmm .... things are slowly starting to come together.....edit on 19/5/2011 by Hellhound604 because: (no reason given)
Siemens Sells Stake in Nuclear Joint Venture to France’s Areva
By Richard Weiss and Niklas Magnusson - Apr 10, 2011 12:46 PM ET
Siemens AG (SIE), Germany’s largest engineering company, sold its 34 percent stake in the Areva NP nuclear-power joint venture to France’s Areva SA. (CEI)
“We are not an owner anymore and Areva paid us the money in the month of March,” Constantin Birnstiel, a spokesman for Munich, Germany-based Siemens, said by telephone today. He couldn’t comment on the sale price, because of an arbitration procedure that may lower or increase the value of the stake. FULL story at link. www.bloomberg.com...
I am afraid I don't. Siemens is in an arbitration process and hence doesn't comment on the issue, neither on nor off the record...
Good luck for your research.
----- Original Message -----
To: RICHARD WEISS (BLOOMBERG/ NEWSROOM
At: 4/15 16:26:53
I just read your informative article regarding the Siemans sale of stake
in the Areva NP joint venture.
I am doing some research on the connection between an Israeli company,
Magna B.S.P., and . Areva.
Magna B.S.P, is the company that won a contract on April of 2010, to
install their devices at Fukushima, Japan
Do you have any information that could help me in my search for
information? Any lead would be greatly appreciated.
Fukushima security, Japan, Iran, Israeli security firms Magna BSP and ICTS
From December, 2009, www.isna.ir...
ISNA - Tehran
Service: Foreign Policy
TEHRAN (ISNA)-Iran has announced readiness for nuclear interaction with other countries and Japan could be one of them, said Foreign Ministry Spokesman, Ramin Mehmanparast, on Tuesday.
Speaking in his weekly press conference, when asked whether Japan will replace Russia for nuclear cooperation with Iran, he said, “the visit to Japan’s nuclear power plants by Secretary of Iran’s Supreme National Security Council Saeed Jalili were upon invitation by the Japanese side.” yardarmswinging.blogspot.com...