Japan - Fukushima Daiichi Nuclear Power Plant Crisis - Units 1 - 6 Reports, News, Graphics - March 11 - March 16

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -

All exposed once again the No. 2 fuel
5:01 minute video in 3 twitter tweet on May 15 (NHK-click and leave the site)

TEPCO, the Fukushima Daiichi Nuclear Power Station Unit 2, 11:00 pm on April 14 will prevent water injection for cooling the reactor, all the fuel rods is exposed again to the reactor water level dropped rapidly was expected to announced. The amount of radiation around the site, and six times the standard 37 minutes to 9 pm, and the highest ever made to the State to inform emergency notification.

According to TEPCO, in Fukushima Daiichi Nuclear Power Station Unit 2, 11:00 pm on April 14 will close the relief valve to reduce the gas pressure in the reactor because of increased pressure in the reactor, nuclear Now 送Renaku water to cool the furnace. Therefore, the reactor water level dropped rapidly, and now is that it seems all the fuel rods is exposed again. In Unit 2, and nuclear reactors for seawater from entering the pump stops 14 days, 2 hours and 20 minutes from 6:30 pm, but all of the exposed fuel rods, then pumping the results ran the afternoon soaked in water was returned to the state of the rods in half at 9:30 too. TEPCO, the valve escape of gas in the nuclear reactor is located about 10 together, promoting such measures reduce the pressure to open the valve another, not to want to recover water by injecting water into the reactor Masu. In Unit 2 the amount of radiation around the site, and 3130 microsievert six times the highest standards in the past 37 minutes 9:00 pm, called for a national emergency to inform "in Article 15 report," the done.

http://www3.nhk.or.jp/news/html/20110315/t10014676411000.html

[AlaskaDenise]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

From post #59...

The No. 2 is to stop pumping water to the reactor to contain 14 days, from entering the sea and 20 minutes, two hours from 6:30 pm, but all of the exposed fuel rods, then pumping Move the result into the sea, back to the state was soaked in water for half of the rods

What is being said here regarding water and the sea? Are they saying they stopped some pumping to prevent any water from returning to the sea, or that some did return to the sea?

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[Gert van der Hoek]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

Nuclear and Industrial Safety Agency

Seismic Damage Information (the 23rd Release)

(Update - As of 19:30 March 14, 2011)

http://www.nisa.meti.go.jp/english/files/en20110315-1.pdf

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[Ronan Kelly]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

From post #59...



What is being said here regarding water and the sea? Are they saying they stopped some pumping to prevent any water from returning to the sea, or that some did return to the sea?

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From what I understand, the steam pressure in the core was greater than the hose pressure. As a result no more sea water could be injected for a time. I believe that particular issue has been fixed.

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translated -

Recovery Unit 2 nuclear power plant without first level
K10046772311_1103150440_1103150441


Water injection will not be able to cool the reactor in Fukushima Daiichi Nuclear Power Station Unit 2 is expected to become Toukyoudenryoku all fuel rods is exposed, the water can be injected into the reactor from 15 am Shortly after 1 Now the water level still has not recovered at 3 am, and believed that the fuel rods remained exposed, and conditions remain uncertain.

The Fukushima Daiichi nuclear power plant No. 2 at around 11 pm on April 14 was closed to reduce the pressure relief valve of the gas in the reactor, because of increased pressure in the reactor, reactor water 送Renaku Narimashi or. Therefore, TEPCO reactor water level falls rapidly, announced that the state is seen to have been exposed to all the fuel rods. Then you can open a valve to reduce pressure in the reactor becoming too 1:00 am on July 15, but that it can now inject water, still water level is raised as 3:00 am, is that it seems that the fuel rods remained exposed. According to TEPCO, the pressure in the reactor is not increased, not changed significantly from the value of the site boundary radiation, "falling into a crisis as soon as I do not think," I said , and continues to be an unpredictable situation. In Unit 2, 14 days to stop the pump, and water from entering the reactor, two hours and 20 minutes from 6:30 pm, all the fuel rods are exposed to, and then ran a result of pump soaked in water was returned to the state of the rods in half 9:30 pm too. A long string of rods is exposed it has melted, TEPCO has decided to speed up the recovery of the water.

http://www3.nhk.or.jp/news/html/20110315/t10014677231000.html

[AlaskaDenise]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

RoRo:

Another post of the actual safety report mentioned that there was no sea water in the pool. I assume they meant pool of normal cooling water, so the article that I couldn't understand may be referring to this fact.

above post, re:

A long string of rods is exposed it has melted

Perhaps why they can't get some of the rods back into a type of containment sleeve might be that as they melt they change shape. It would be like trying to get the "square peg into a round hole". If that's true it would change the game plan.

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[Ronan Kelly]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

RoRo:

Another post of the actual safety report mentioned that there was no sea water in the pool. I assume they meant pool of normal cooling water, so the article that I couldn't understand may be referring to this fact.

above post, re:
Perhaps why they can't get some of the rods back into a type of containment sleeve might be that as they melt they change shape. It would be like trying to get the "square peg into a round hole". If that's true it would change the game plan.

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I think that these are 2 seperate issues.

I would guess that you can't pump directly from the ocean to the reactor core - the water would first have to be filtered and probably pumped to a reservoir, and then from there to the core. My guess (and that's all that this is) is that the reservoir ran dry - there's probably a lot of debris post-tsunami clogging the intake that requires frequent unclogging.

The second issue with unit 2 was when the steam pressure built up inside, no water could be pushed into the core. For that time, what fluid there was in the core space was being rapidly evaporated and as the water level dropped, the core was exposed it would seem to a significant extent. I think that they are still trying to raise the water level. The fact that there has not yet been another hydrogen explosion is encouraging.

Note I am not a nuclear anything - my training is math and chemistry.

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -

An unpredictable situation of primary

5:06 min 3 twitter tweet on May 15 (NHK leaves the site and click)

The TEPCO's Fukushima Daiichi nuclear power plant that is no longer ensure sufficient cooling, 14, at No. 2, the water level is down to cool the reactor and is exposed to all the fuel rods, Some are expected to melt.

In Unit 3 is expected to explode a hydrogen explosion, along with 11 people injured workers and the SDF's primary. TEPCO order to safely stop the reactor, but the rushing water Pour cooled, continues to be an unpredictable situation.

In Unit 2, it stops pumping water into the reactor and is exposed to all the water over the fuel rods from about 2 hours and 20 minutes at 6:30 pm on April 14 and only partially melted has been. Because the fuel pump is no longer among the staff to monitor away, and then pump ran a result, water levels rose. However, at around 11 to 14 pm, water injection will not be able to cool the fuel rods is increasing pressure in the reactor, all the fuel rods is exposed to rapidly falling water level again in the furnace now. Then, from too much irrigation is now 1:00 am, the water level still rising at 3 am has not been confirmed, can be seen that the fuel rods remained exposed. Unit 3, 11 o'clock Thursday morning, the exterior walls and roof of the building 吹Ki飛Bimashita reactor explosion. After 14 days, falling water level of the water to cool the reactor, exposed on the surface of the water fuel rods, that likely occurred amount of hydrogen, the hydrogen explosion as the No. 1 of 13 is expected to occur. However, the value of the amount of radiation around the site because there is no abnormal rise TEPCO country and cover the reactor containment vessel to maintain the capability to have. Currently, the pressure in the reactor that is stable to resume at 3:00 am on July 15 Injection of sea water for cooling the reactor had been temporarily suspended, and continues to cool. In this explosion, along with 11 people injured workers and the SDF's primary. An explosion occurred in No. 13, which had been in operation in the sea meets the containment covering it with a nuclear reactor to cool the reactor, a pump moved the water to scoop up early Saturday morning 14 no longer work for injection is suspended. Subsequently, materials such as pumps equipped with a water re-enter and resume work from about 0:00 am on July 15. Currently, the water level and pressure such that the reactor is stable, TEPCO to make in a hurry to cool the reactor down safely. Meanwhile, the primary second Fukushima, Unit 2 and the No. 1 in the 3 groups together in Unit 4, freezes and the effects of the tsunami pump cool water in the reactor Kumi上Ge sea water, sufficient capability to cool the interior remained were not secured. However, the results and to replace the motor to move the pump No. 2 and the No. 1 is to restore function, cooling down to below 100 degrees the temperature of the reactor until 4:00 pm on April 14 that shut down safely has been confirmed. Also remains No. 4 is that the temperature has dropped steadily. Reached the fifth day from the earthquake, the second in a primary, but the situation has improved, three on the first primary, the situation continues to remain uncertain.

http://www3.nhk.or.jp/news/html/20110315/t10014677511000.html

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -

Task Force to integrate government and TEPCO
5:06 min 3 twitter tweet on May 15 (NHK leaves the site and click)

Prime Minister Naoto Kan, around 5:30 am on July 15, told reporters at the residence of the Prime Minister, on TEPCO's Fukushima Daiichi nuclear power plant has become impossible to secure sufficient cooling capability, and TEPCO and the government together corresponding to "headquarters" integrated with the launch a show that.

In this context, Prime Minister Naoto Kan, "the Fukushima nuclear power plant accident, as a unified government and TEPCO] [task force decided to launch integration. In My Head, 海江田 Economy to ask the Deputy President and Minister of TEPCO Shimizu. for real-time task force to deal with Tokyo Electric Power is a government employer, it is better integrated with both head office headquarters Toukyoudenryoku decided to put in, "he said, and Tokyo Electric Power Co. as a unified government" task force integration, "which revealed that with the launch. He added Prime Minister Naoto Kan said, "Currently, the spread of such an accident victim in full force, hitting every hand. The alarming situation has continued to spearhead standing to overcome this crisis Nukitai do. to everyone that put people's concerns, the country's national unity, I want to overcome this crisis, "he said. Prime Minister Naoto Kan, at 5:30 am on July 15 too, entered the headquarters Electric Power Company. After this, "Integrated Task Force" is supposed to attend the first meeting.

http://www3.nhk.or.jp/news/html/20110315/t10014677571000.html

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -

Until the next County emission of radioactive materials
2:07 min 3 twitter tweet on May 15 (NHK leaves the site and click)

Fukushima Daiichi nuclear power plant, but continues to be an unpredictable situation, a series of cases is believed to be carried to the neighboring provinces of radioactive material released by the three reactors. Any health effects has not been level.

Three nuclear reactors in Fukushima Daiichi nuclear power plant is partially melted and may have exposed both the fuel from the water, the No. 1 and No. 3 in the other part of the building exploded, Work has also been forced to release the air containing the radioactive material to reduce the pressure reactor.

Kita Ibaraki City, Ibaraki Prefecture, Fukushima Prefecture, on the border with about 80 kilometers south of origin, found in Ibaraki Prefecture, that measure the increase in the amount of radiation to 15 days. 4.87 per hour at 4:00 am is that it shows nearly 100 times the normal value microsievert. This is about one-tenth per X-ray of the chest, Ibaraki Prefecture, the level of health that has no effect.

In addition, the Tohoku Electric Power Co. nuclear power plant in Onagawa, Miyagi, 13, a maximum of 5.7 times the amount of radiation also microsievert measured, even in the vicinity of Sendai, the United States hit by the earthquake relief effort in some cases was slightly contaminated with radioactive material that military personnel are expected to have been carried by wind to neighboring counties comes from radioactive material Fukushima Daiichi nuclear power plant.

http://www3.nhk.or.jp/news/html/20110315/t10014677541000.html

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -

2 machine “part deficiency it is found”

March 15th 7:8 Branch field secretariat director passed and interviewed, 15th 6:40 AM the reporter made that deficiency is found 2 at portion of the machine of the Tokyo Electric Power first nuclear power plant clear.According to branch field director, it means that in the part in order deficiency being found, 2 in the machine, connects the reactor and the Containment Vessel, to change vapor into water, with the Tokyo Electric Power main office Prime Minister 菅 received report from the Tokyo Electric Power side.Simply, branch field director explained “, it is not the kind of situation which the density of radiation around has not shown sudden rise, causes damage to the human body”, that.

http://www3.nhk.or.jp/news/html/20110315/t10014677851000.html

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -

Chief Cabinet Secretary as soon as possible convergence
2:07 min 3 twitter tweet on May 15 (NHK leaves the site and click)

Chief Cabinet Secretary 枝野 is too much at a press conference at 5:30 am on July 15, for Unit 2 of Fukushima Daiichi Nuclear Power Station TEPCO "has been worked on for the cooling water injection, but not necessarily in a stable condition "adding he said, established a government and TEPCO headquarters integration showed 努Metai idea of the situation as soon as possible to converge.

Chief Cabinet Secretary 枝野 in this for the nuclear power plant Fukushima Daiichi TEPCO, "for Unit 3 and the No. 1, which acts as a constant cooling. However, Unit 2, Work injection for cooling has been done, not necessarily in a stable condition, "he said. He added, 枝野 Minister is due to the government and TEPCO, "Integrated Task Force" will be established, the public quickly and accurately convey information to take decisions in an integrated fashion with information on local government and the Tokyo Electric Power Co., the situation suggested the idea of convergence 努Metai soon as possible. The Secretary 枝野 the status of Unit 2, "the perception that there is no imminent. Currently, there are probably not functioning water gauge, water level, and actually contains water pressure in the reactor I believe that in that. It features open instability to lower the pressure relief valve of the gas in the reactor. as soon as possible, allowing coolant to be stable, the convergence of the situation lead, "he said. In addition, the Secretary 枝野 the possibility of hydrogen explosion in the No. 2, "a large explosion can occur is considered low," he said.

http://www3.nhk.or.jp/news/html/20110315/t10014677771000.html

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -


Explosions in the No. 2 Fukushima Daiichi nuclear power plant

9:08 min 3 twitter tweet on May 15 (NHK leaves the site and click)

In the interview conducted before 8:00 am and Nuclear Safety Agency, Ministry of Economy, "was the explosion at 6:10 am at the No. 2 in Fukushima Daiichi Nuclear Power Station," revealed that the was. The No. 2 and the nuclear fuel from the water also revealed that 2.7 meters is exposed.当Tarimasu exposed length is about half of the entire nuclear fuel. In addition, the Fukushima Daiichi Nuclear Power Station near, shortly after the confirmation of the explosion revealed that 965.5 was observed for the value of a microsievert radiation. Nuclear Safety Agency, with regard to radiation dose, the "value does not appear immediately damage your health" is explained.

Fukushima No. 2 nuclear power plant at first, at a press conference Tuesday morning, Chief Cabinet Secretary 枝野 15 has become clear that there is damage to the equipment connected to the reactor containment vessel, called Sapuresshonpuru cover. Containment is a facility that has come out an important role in confining the radioactive material leaked out when the accident occurred at a nuclear power plant, by damage to some of this equipment is found, the confinement of radioactive materials we could not work out well. Chief Cabinet Secretary 枝野 the "numbers do not show radiation around a rapid rise," he said, in a situation harmful to the health of the residents immediately shows no recognition of

http://www3.nhk.or.jp/news/html/20110315/t10014678161000.html

[sharon sanders]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

machine translation -

Reported nearly four times the reference dose

May 15 at 8:00 for 33 minutes in 3 twitter tweet (click on the site leaves the NHK)

According to TEPCO's press conference, to suppress the pressure containment of Fukushima Daiichi Nuclear Power Station Unit 2 "pressure suppression chamber, " at 7:00 AM 50 minutes after the impact sound at the front gate of a nuclear power plant near Is that it measured the amount of radiation per hour microsievert 1941. This value, called an emergency notifythe State "in Article 15 report, " nearly four times the 当Tarimasu criterion.

http://www3.nhk.or.jp/news/html/20110315/t10014678291000.html

[AlaskaDenise]

Re: Japan - Fukushima Daiichi Nuclear Power Plant - Unit 1 Meltdown & Radiation released, Unit 3 had hydrogen explosion, Unit 2 problem cooling & possible fuel rod failure, and release of radioactive material

BBC: Meltdown alert at Japan reactor

Technicians are battling to stabilise a third reactor at a quake-stricken Japanese nuclear plant that has been rocked by a second blast in three days.

Sea water is being pumped into reactor 2 at the Fukushima Daiichi plant after its fuel rods were fully exposed twice.

International nuclear watchdogs said there was no sign of a meltdown but one minister said a melting of rods was "highly likely" to be happening.

(snipped)

Chief Cabinet Secretary Yukio Edano said there were signs that the fuel rods were melting in all three reactors.

"Although we cannot directly check it, it's highly likely happening," he told reporters.

read more & conflicting opinions at:

http://www.bbc.co.uk/news/world-asia-pacific-12733393

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