Archives de octobre 2011

Status of Fukushima Daiichi Nuclear Power Station

Tokyo Elec. Power : (Oct 30,2011)Plant Status of Fukushima Daiichi Nuclear Power Station (as of 3:30 pm, Oct. 30)

All 6 units of Fukushima Daiichi Nuclear Power Station have been shut down.

Unit 1 (Shut down)
-Explosive sound and white smoke were confirmed after the big quake
 occurred at 3:36 pm on March 12. It was assumed to be hydrogen explosion.
-At 3:37 pm on March 25, we started injecting freshwater to the reactor and
 are now injecting fresh water by a motor driven pump powered by the off-
 site transmission line.
 At 3:05 pm on October 30, we adjusted the amount of water injected to the
 reactor approx.6.5 m3/h in order to improve the working condition inside
 the covers by mitigating the evaporation from the reactor building.
 The current water injection volume is approx 6.5 m3/h from the reactor
 feed water system.
-We commenced injection of nitrogen gas into Primary Containment Vessel at
 1:31 am on April 7.
-At 11:22 am on August 10, we started cyclic cooling for the water in the
 spent fuel pool by an alternative cooling equipment of the Fuel Pool
 Cooling and Filtering System.
-On October 28, we completed installation of the cover for the Reactor
 Building in order to contain dispersion of radioactive substances.

Unit 2 (Shut down)
-At approximately 6:00 am on March 15, an abnormal noise began emanating
 from nearby Pressure Suppression Chamber and the pressure within the
 chamber decreased.
-At 10:10 am on March 26, we started injecting freshwater to the reactor
 and are now injecting fresh water by a motor driven pump powered by the
 off-site transmission line.
-At 2:59 pm on September 14, we started injecting water to the reactor
 through core spray system water injection piping arrangement in addition
 to the water injection through reactor feed water system piping
 arrangement.
 Water is currently injected at approx. 2.8 m3/h through reactor feed water
 system piping arrangement, and at approx. 7 m3/h through core spray system
 water injection piping arrangement.
-At 5:21 pm on May 31, we started cyclic cooling for the water in the spent
 fuel pool by an alternative cooling equipment of the Fuel Pool Cooling and
 Filtering System.
-At 8:06 pm on June 28, we started injecting nitrogen gas into the Primary
 Containment Vessel.
-At 10:30 am on October 27, we conducted leak test of the system as a part
 of construction to settle the gas control system of Primary Containment
 Vessel at the reactor building of Unit 2.  As a result, we confirmed in-
 leak volume to the system had no problem. In addition, we conducted
 tentative operation test. As a result, we confirmed operational aspect of
 electric heater and exhaust fun had no problem.
 At 12:53 pm on October 28, we activated the exhaust fan of the gas
 management system of the reactor containment vessel in the reactor
 building and started test operation. As we confirmed stable operation of
 the system, from 6:00 pm on the same day, we put the system in operation.
 Regarding the hydrogen concentration of the gas management system of the
 reactor containment vessel in Unit 2, we confirmed that it increased to
 approx. 2.3vol% at 5:00pm on 29 October, which was approx. 1vol% at the
 beginning of the operation. Therefore we adjusted the amount of injecting
 nitrogen gas from approx.14 Nm3/h to 16.5 Nm3/h in order to avoid
 exceeding the combustible threshold concentration (4vol%) of hydrogen. 

Unit 3 (Shut down)
-Explosive sound and white smoke were confirmed at approximately 11:01 am
 on March 14. It was assumed to be hydrogen explosion.
-At 6:02 pm on March 25, we started injecting fresh water to the reactor
 and are now injecting fresh water by a motor driven pump powered by the
 off-site transmission line.
-At 2:58 pm on September 1, we started water injection by core spray system
 in addition to water injection by the reactor feed water system piping
 arrangement.
 Water is currently injected at approx. 2.6 m3/h through reactor feed water
 system piping arrangement, and at approx. 8.1 m3/h through core spray
 system water injection piping arrangement.
-At 7:47 pm on June 30, we started cyclic cooling for the water in the
 spent fuel pool by an alternative cooling equipment of the Fuel Pool
 Cooling and Filtering System.
-At 8:01 pm on July 14, injection of nitrogen gas into the Primary
 Containment Vessel started.

Unit 4 (Outage due to regular inspection)
-At around 6 am on March 15, we confirmed the explosive sound and the
 sustained damage around the 5th floor rooftop area of Reactor Building.
-At 12:44 pm on July 31, we started cyclic cooling for the water in the
 spent fuel pool by an alternative cooling equipment of the Fuel Pool
 Cooling and Filtering System.
-At 11:34 am on August 20, we started an operation of desalination
 equipment in the spent fuel pool.
-At this moment, we don't think there is any reactor coolant leakage
 inside the primary containment vessel.

Unit 5 (Outage due to regular inspection)
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 5:00 am on March 19, we started the Residual Heat Removal System Pump
 in order to cool the spent fuel pool.
-At 2:30 pm on March 20, the reactor achieved cold shutdown.
-At 2:45 pm on July 15, we started the operation of the original Residual
 Heat Removal System (System B) by its original seawater pump.
-At this moment, we don't think there is any reactor coolant leakage
 inside the primary containment vessel.

Unit 6 (Outage due to regular inspection)
-Sufficient level of reactor coolant to ensure safety is maintained.
-At 10:14 pm on March 19, we started the Residual Heat Removal System Pump
 of Unit 6 to cool down Spent Fuel Pool.
-At 7:27 pm on March 20, the reactor achieved cold shutdown.
-At 2:33 pm on September 15, we started separately cooling the reactor
 through the Residual Heat Removal System and the spent fuel pool through
 Equipment Cooling Water System and Fuel Pool Cooling System.
-At this time, we don't think there is any reactor coolant leakage inside
 the primary containment vessel. 

Injuries
-At 8:30 am on October 29, two workers from the cooperating companies were
 injured during dismantling of the large crane used to install the cover
 for the Reactor Building, Unit 1 within the site boundary. At 9:50 am, one
 worker departed the emergency room, Units 5 and 6 and will be transported
 to a hospital by an air ambulance. The other worker will be transported to
 the hospital by a company vehicle. At 10:35 am on October 29, we
 transported one worker to Fukushima Medical University Hospital by an air
 ambulance and provided medical treatment including operation. At 2:20 pm
 on the same date, we transported the other worker to Sogo Iwaki Kyoritsu
 Hospital, Iwaki City and provided medical checkup.

Others
-At around 10 am on June 13, we started the operation of the circulating
 seawater purification facility installed at the screen area of Unit 2 and
 3.
-At 8 pm on June 17, we started operation of Water Treatment Facility
 against the accumulated water. At 6:00 pm on July 2, we started the
 circulating injection cooling to inject the water, which was treated by
 the accumulated water treatment system, to the reactors through the buffer
 tank.
-At 7:41 pm on August 19, we started treatment of accumulated water by
 parallel operation of one line from the cesium adsorption instrument to
 the decontamination instrument and the other treatment line of the cesium
 adsorption instrument No.2.
-At 2:06 pm on October 7, we started to spray purified accumulated water
 brought from Unit 5 and 6 continually in order to prevent dust scattering
 and potential fire outbreaks from the cut down trees.
-At 10:12 am on October 20, we started transferring the accumulated water
 from the basement of turbine building of Unit 2 to the Process Main
 Building of Central Radioactive Waste Treatment Facility.  At 9:32 am on
 October 28, we stopped transferring the accumulated water from the
 basement of turbine building of Unit 2 to the Process Main Building of
 Central Radioactive Waste Treatment Facility temporarily, and after
 checking the systematic diagram, at 9:54 am on October 28 we changed the
 destination of transferring the accumulated water to High Temperature
 Incinerator Building of Centralized Radiation Waste Treatment Facility.
-On October 28, we started installation of the water proof wall at the sea
 side, in front of the existing shore protection, Units 1-4, in order to
 contain marine pollution by underground water.
-At 10:00 am on October 30, we started transferring accumulated water from
 the turbine building of Unit 6 to the temporarily build tank.
Updates:
http://www.4-traders.com/TOKYO-ELEC-POWER-6491247/news/TOKYO-ELEC-POWER-Oct-30-2011-Plant-Status-of-Fukushima-Daiichi-Nuclear-Power-Station-as-of-3-30-pm-O-13865014/

Publicités

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Before and After Photos of 2011 Japan Earthquake and Tsunami Destruction Show 6 Months of Speedy Cleanup

Source:

http://links.laughingsquid.com/

 

 

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Fukushima update

Health minister Yoko Komiyama announced Friday that the government will lower the allowable amount of radiation in food products from 5 millisieverts per year to 1, but some experts are puzzled.

 Permanent limits for various categories of food will be set based on recommendations submitted Thursday by the government’s food panel. 

The current limit of 500 becquerels per kilogram of radiation for meat, fish and vegetables is also expected to be lowered by about one-fifth in April.

Citing findings from various studies, the food safety panel concluded Thursday that a cumulative dose of 100 millisieverts or more throughout one’s lifetime poses significant health risks.

But experts question the focus solely on internal exposure from food and drink, while ignoring external exposure from radioactive materials, such as fallout on the ground, roofs and in ditches.

« I can’t think of a reason why they decided to omit external exposure as a factor in the proposal this time, » said Dr. Eisuke Matsui, who heads the Gifu Environmental Medicine Research Institute.

The radiology expert noted that while consuming food contaminated with radiation is a far bigger risk to human health than being exposed to radiation from the environment, it does not mean it can be disregarded.

« Think of the children in the cities of Fukushima or Minamisoma, where there is a relatively high level of radiation in the environment, » Matsui said. « Any guideline on radiation should consider the total exposure and not only the limit of contaminated food one can consume. »

According to the International Commission on Radiological Protection, a cumulative dose of 100 millisieverts increases the risk of dying from cancer by 0.5 percent. An organization of scientists, the ICRP’s recommendations serve as the basis for radiation regulations of many developed countries, including Japan.

The current limits for food and drink were set on a provisional basis soon after the nuclear crisis broke out in March at the troubled Fukushima nuclear power plant.

In July the same panel proposed in a preparatory report that 100 millisieverts be the combined limit of both internal and external exposure to radiation.

Questioned by reporters about the decision to drop external exposure from consideration, panel Chairwoman Naoko Koizumi offered no clear explanation.

Members of the panel, consisting of independent experts, asserted fallout across eastern parts of the country from the March meltdowns at the Fukushima No. 1 nuclear plant did not dramatically increase the risk from external exposure.

Koizumi also noted that other branches of the government should conduct studies on the matter, not just the food safety panel.

There are few studies of the effects of low-level radiation for extended periods, a key subject of debate among experts for years.

One study cited by the panel to explain the 100-millisievert regulation looked at cancer rates among survivors of one-time exposure to high levels of radiation, such as in the nuclear bombings of Hiroshima and Nagasaki in 1945.

Radiology expert Matsui argued that the government should make certain of the facts before advancing policies.

« Personally, I think the cumulative 100-millisievert limit is too high, whether it is only for internal exposure to radiation or not. For children, I think it should be at least one-tenth of that, » he said.

http://www.japantimes.co.jp/text/nn20111028x1.html

http://www.lavoixdunord.fr/France_Monde/actualite/Secteur_France_Monde/2011/10/29/article_fukushima-un-reacteur-recouvert-pour-lim.shtml

Radiation map update

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Japan nuclear radiation higher than estimated

Read Here:

http://www.lemonde.fr/planete/article/2011/10/27/fukushima-rejets-records-d-elements-radioactifs-en-mer_1595116_3244.html

or

http://independentnewshub.com/?p=46854

Study: Japan nuke radiation higher than estimated

In this March 15, 2011 photo released by Tokyo Electric Power Co., smoke rises from the badly damaged Unit 3 reactor, left, next to the Unit 4 reactor covered by an outer wall at the Fukushima No. 1 nuclear complex in Okuma, northeastern Japan. (AP Photo/Tokyo Electric Power Co.)

NEW YORK (AP) — The Fukushima nuclear disaster released twice as much of a radioactive substance into the atmosphere as Japanese authorities estimated, reaching 40 percent of the total from Chernobyl, a preliminary report says.

The estimate of much higher levels of radioactive cesium-137 comes from a worldwide network of sensors. Study author Andreas Stohl of the Norwegian Institute for Air Research says the Japanese government estimate came only from data in Japan, and that would have missed emissions blown out to sea.

The study did not consider health implications of the radiation. Cesium-137 is dangerous because it can last for decades in the environment, releasing cancer-causing radiation.

The long-term effects of the nuclear accident are unclear because of the difficulty of measuring radiation amounts people received.

In a telephone interview, Stohl said emission estimates are so imprecise that finding twice the amount of cesium isn’t considered a major difference. He said some previous estimates had been higher than his.

In this March 12, 2011 image made from video from NTV Japan via APTN, smoke rises from Unit 1 of the Fukushima No. 1 Nuclear Power Plant in Okuma, Fukushima Prefecture. (AP Photo/NTV Japan via APTN)

The journal Atmospheric Chemistry and Physics posted the report online for comment, but the study has not yet completed a formal review by experts in the field or been accepted for publication.

Last summer, the Japanese government estimated that the March 11 Fukushima accident released 15,000 terabecquerels of cesium. Terabecquerels are a radiation measurement. The new report from Stohl and co-authors estimates about 36,000 terabecquerels through April 20. That’s about 42 percent of the estimated release from Chernobyl, the report says.

An official at the Nuclear and Industrial Safety Agency, the Japanese government branch overseeing such findings, said the agency could not offer any comment on the study because it had not reviewed its contents.

It also says about a fifth of the cesium fell on land in Japan, while most of the rest fell into the Pacific Ocean. Only about 2 percent of the fallout came down on land outside Japan, the report concluded.

Experts have no firm projections about how many cancers could result because they’re still trying to find out what doses people received. Some radiation from the accident has also been detected in Tokyo and in the United States, but experts say they expect no significant health consequences there.

Still, concern about radiation is strong in Japan. Many parents of small children in Tokyo worry about the discovery of radiation hotspots even though government officials say they don’t pose a health risk. And former prime minister Naoto Kan has said the most contaminated areas inside the evacuation zone could be uninhabitable for decades.

Stohl also noted that his study found cesium-137 emissions dropped suddenly at the time workers started spraying water on the spent fuel pool from one of the reactors. That challenges previous thinking that the pool wasn’t emitting cesium, he said.

This satellite file image taken on March 14, 2011, and provided by DigitalGlobe shows the damaged Fukushima Dai-ichi nuclear facility in Okuma, Fukushima Prefecture, northeastern Japan. (AP Photo/DigitalGlobe)

(Mainichi Japan) October 28, 2011

Radiation Map

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Updates

Radiation Map update

JAPANESE RESIDENTS NEEDLESSLY EXPOSED TO RADIATION

TOKYO IGNORED CALLS TO ISSUE IODINE DURING CRISIS

http://enformable.com/2011/10/japanese-residents-needlessly-exposed-to-radiation-tokyo-ignored-calls-to-issue-iodine-during-crisis/

 

 

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Fight for the truth-A project for show our support to Dir En Grey and Japan

To DIR EN GREY fans,

We would create an event for 11th March 2012, for show our support to the band and to the « Scream for the truth » campaign and show our respect to Japan and all victims of earthquake and Tsunami

If you would to help us please send a mail here:

direngreyforever@yahoo.com

Thank you very much

 

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Radiation map update,informations about earthquake

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Yahoo news

Updates 17:04

http://www.japantimes.co.jp/radiation-levels.html

Radiation contamined cars sold in Japan:

http://finance.ninemsn.com.au/newsbusiness/8365720/radiation-contaminated-cars-sold-in-japan

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