The explosion accident occurred at Fukushima Daiichi Nuclear Power Plant is over the International Atomic Energy Evaluation Scale "Level 4"

On the explosion accident occurred around 15:30 at TEPCO's Fukushima Daiichi Nuclear Power Station Unit 1, the Nuclear and Industrial Safety Agency of Nuclear and Industrial Safety Agency Nuclear and Industrial Safety Agency said in a press conference held late Monday, It was provisionally level 4 "and explained.

It was decided to standardize the event report of nuclear accidentInternational Atomic Energy Evaluation Scale(INES)Level 4 is due to "Accidents without major risk outside the office"It is classified as.

Details are as below.
2011/03/13 02:12
Fukushima Daiichi Nuclear Accident, Severity Level 4 or higher: Science: YOMIURI ONLINE (Yomiuri Shimbun)

According to the NISA and the Yomiuri Shimbun and other news reports, the explosion accident that occurred at Unit 1 of Fukushima Daiichi Nuclear Power Plant "Tentatively Level 4".International Atomic Energy Evaluation ScaleAccording to Level 4, "Accidents without major risk outside the office" occurred in 1999Tokai village JCO criticality accidentIt is an accident comparable to.Chernobyl nuclear power plant accidentIs level 7,Three Mile Island nuclear power plant accidentIs classified as level 5.

If the building explosion and fuel damage overlap, it means that multiple containment at the nuclear facility was broken and there is a possibility that it may be judged to be level 4 or higher.

2011/03/13 02:23
According to Tokyo Electric Power Company, it seems there is a possibility that the water level gauge was broken at the time of the explosion, because the core water level of Fukushima Daiichi nuclear power plant No. 1 could not be measured. Also, although it is thought that the core is damaged with considerable probability, at the present time, it is said that core melting is not going on.

2011/03/13 02:26
According to Fuji TV, there seems to be some people who have not yet reached evacuation centers on evacuation from within 20 km of the Fukushima Daiichi nuclear plant.

2011/03/13 02:58
The Nuclear Power Safety and NISA interview continues to be delivered Ustream at the URL below.

USTREAM: hatakezo Live: Politics related videos such as politician's press conference, speech, interview, etc. are relayed.

2011/03/13 02:58
The interview was to be divided once, Ustream distribution stopped.

2011/03/13/03: 45
The International Atomic Energy Agency (IAEA) has released information that it received reports from Tokyo Electric Power Company about the accident.

IAEA update on Japan Earthquake

2011/03/13 03:58
Nuclear power plant nuclear melting "level 4 NHK news

Radioactive substances such as cesium and iodine that can be generated by nuclear fission of fuel uranium are detected in TEPCO · Fukushima Daiichi Nuclear Power Station Unit 1, nuclear fuel melts out at high temperature Nuclear power safety · NISA decided that it is "Level 4" corresponding to the case of ▽ fuel damage and ▽ release of substantial amount of radioactive material out of 8 stages.

2011/03/13 04: 48
NHK news to the stricken areas of the aid team of each country's earthquake

In response to the earthquake this year, emergency relief teams in each country are aiming for entering afflicted areas. Following the Korean and Singapore rescue team arriving in Japan on 12th, the American rescue team will arrive at Misawa base in Aomori Prefecture on the morning of 13th. The rescue team will head to the afflicted area immediately and decide to start activities such as rescue and treatment of injured persons.

In addition, Britain, Germany, China, Thailand and others organized donor teams, and Russia reveals the idea to provide support regardless of the territorial issue.

2011/03/13 05: 05
At the Nuclear and Industrial Safety Agency's meeting scheduled from 5 o'clock, the official has been called to the prime minister's official residence for explanation, and since the meeting has not come back yet, the beginning of the meeting has been extended.

Ministry of Economy, Trade and Industry Nuclear and Industrial Safety Agency Press Conference - Nico Nico Live Broadcasting


2011/03/13 05: 30
A meeting of NISA seems to start.

2011/03/13 05: 37
In the meantime, it is said that the executive director instructed Negai to deliberate the meeting.


Regarding the operation status of the power plant, Tohoku Electric Power Isagawa Nuclear Power Station is automatically stopped first at the moment. Fukushima Daiichi Nuclear Power Plant No. 4 to 6 was stopped for inspection, so we omit the report. For Units 1 to 3, although Scrum succeeded, it has reached the present state with various difficulties due to the subsequent heat removal. Especially about the situation of Unit No. 1 will be explained later. Monitoring situation has been relatively low and stable in recent years. Unit 3 of the Fukushima Daiichi Nuclear Power Plant has been cold shutdown. I am watching taking 1, 2, 4 until it stops. This area confirms the fact.

2011/03/13 05: 46
The Fukushima Daiichi nuclear power plant Unit 1 orders the sea water injection as the act of law by the Minister. The seawater injection started at 20:20 and already supplies a specified amount of water (the amount of water that becomes full water) as a supply. However, since it is a talk of whether it is possible to believe with the numerical value while watching the water gauge data, since it is the most important act not to worsen the event that "supply of seawater is done without interruption" is currently the case, We are monitoring whether the person in charge is able to inject water without problems.

I received support from Minister Haita Minister at the official residence to see the inspector from the NISA confirmed the business operator earlier. We are preparing to allow seawater supply to be continued, so that alternative means can be put out immediately if not available. As soon as it gets brighter, she is preparing to put people at the scene. I am also receiving the appointment of Vice Minister Ikeda who is dispatched to the site, and it will be on site responsibility as to when to issue it.

NISA "Water level drop of coolant after seawater injection" Instrument malfunction: Nihon Keizai Shimbun

2011/03/13 5:51
The opinion of experts including the Nuclear Safety Commission, that it may be considered that there is no fear that the situation will worsen if water supply continues. If something goes wrong, it may affect the surrounding environmental monitoring data, but at this stage, since we do not indicate values ​​that are of particular concern in running data , It seems that water supply has been done for water supply so far. It is conceivable that it flows to the chamber side when the injected water becomes full, but as for Nagasaki, as for the NISA, including the preparation for backing up the supply, the attitude that the supply of water will not be interrupted Making it the most important task.

For Unit 2 and Unit 3, preparation is completed by vent operation when necessary. Even Tokyo Electric Power Co., as well as preparing to use the event at Unit 1, basically working on the premise that as much as possible seeing the situation, work at the stage where the amount released when doing a vent is small and can be managed I have confirmed that I am doing.

2011/03/13 05: 54
Regarding Fukushima No. 2 Nuclear Power Plants No. 1, 2 and 4, the situation that we are seeing the situation for the moment is not changed at the moment.

2011/03/13 05: 55
About the Fukushima Daiichi nuclear power plant Unit 3, we received notification of No. 15 event due to the total water supply loss at 5: 10. Regarding this procedure, we will ask the Minister, Prime Minister, to raise the decision after submitting it.

Nuclear Emergency Preparedness Glossary: ​​Emergency Criteria (Article 15 Condition)

2011/03/13 05: 57
For bus evacuees from Futaba Town, 9 people out of about 100 measurements are measured, and although not immediately damaged by health, radiation exposure is seen. Consult with the local and the prefecture, first of all, where is the monitoring situation of the exposure situation, what kind of support can be done at NISA (material arrangement, person arrangement, etc.), working mainly on medical teams.

2011/03/13 06: 01
Asahi.com (Asahi Shimbun): Nuclear power plant information after the official residence 3 hours after sunset instructions after police officers - politics

In the government data released on the morning of 11th the previous day, among the items described in the current situation surrounding Unit 2 of Fukushima Daiichi Nuclear Power Plant, "core damage prediction start prediction, around 22:20", "Fuel clad pipe breakage prediction, 23 About 50 minutes "was stated. For these reasons, the possibility of core melting and emission of radiation to the outdoor was pointed out about Fukushima Daiichi Nuclear Power Plant.
Mr. Edano repeatedly asked, "Was it not confirming the damage?" At the press conference, but only told that "I'd like to show it firmly at the stage when it is completed, including confirmation and analysis of the final facts" So, I began with a careful answer.

2011/03/13 06: 16
Regarding the number of people exposed, NISA has heard that about 60 people are "exposed" from the prefecture, while about 35 people heard that the prefecture is "not exposed", and 100 bus evacuees Measuring nine of them, "We are exposed to radiation, although not numerically damaged, 91 people are not measuring." In the press conference, the expression "There are some people saying that there is a possibility of exposure to about 70 to about 169 people" was done.

2011/03/13 06: 20
Q: What is the value of 40,000 cpm?
A: It is not a value that immediately affects health, but it can not say anything.
Q: Do not you know the time of exposure from the time you measured the exposure?
A: I will make an effort about that, but I can only say that I am sorry if I am told that I can get it by the next meeting.

2011/03/13 06: 28
Q: I was told that keeping water on is important, but how much should I put in? How long should it last?
A: I heard that the capacity of the pump is 30 tons per hour, and it is turning it all over.
Q: Have you been told that it was full (there was a reaction that became full)?
A: It is not for now, and it keeps putting 30 tons of water for 1 hour.
Q: Is it like keeping burns constantly chilled with running water?
A: This is an easy-to-understand explanation, thank you.

2011/03/13 06: 35
Q: When I introduce sea water, will it become a decommissioning furnace?
A: It is not where we make that decision yet.
Q: Is it also possible to keep seawater in this state and take it for cooling? In that case is it possible on what dates?
A: It will be optimism. We are moving on the assumption of the worst.
Q: What is the possibility of core melting?
A: I can not deny by thinking that substance (cesium) appears as a possibility, but I do not know it unless I open it at the end.

2011/03/13 06: 45
TV Tokyo began relaying the interview of this Nuclear and Industrial Safety Agency.

2011/03/13 06: 50
Q: Regarding Fukushima Daiichi Nuclear Power Plant, it seems that there are two or three monitoring points, but will not we increase the number or strengthen the system in the future?
A: As you can tell, it is a thing to think about, but a place where you can make a state where you can make a mistake in the afflicted area. Because there are limitations of personnel and priority of support for victims, we will do things that can be done first, so we would like you to understand that we are maximizing our ingenuity, including the employer.

The press conference is over.

2011/03/13 07: 02
Conditions that will not allow Fukushima nuclear power station prevention NHK News

At the Fukushima Prefecture's Fukushima Prefecture's Fukushima Daiichi Nuclear Power Plant Unit No.2 and Fukushima Daiichi Nuclear Power Reactor 3 in Fukushima Prefecture, where the nuclear reactor safe cooling system fails on the 11th, the nuclear reactors Although work to completely cool down after stopping is proceeding, even after two days from the occurrence of the earthquake, the measure is not standing and the condition which does not predict continues.