Radiation Fears After the Quake, Lack of Information

March 16, 2011 Juju Kurihara 0 Comments

fukushima plant

Since the quake attacked Japan on the 11th of March, already three explosions have happened in Fukushima nuclear plant.


Today as the water level of the reactor 2 of Fukushima Plant 1 had fallen and the fuel rod had been revealed without covered for two hours. It was about 18hrs at local time then sea water was poured into the rector, however the pressure inside the rector had become high and the fuel rod was again uncovered with water. At the mid night, finally they opened the valve to low the pressure. (The building on the left is the rector 1 and on the right is the rector  of Fukushima nuclear plant)

fuel pool


This is a reactor rod. According to the nuclear specialist, at 1,200ºC it starts to react to the vapor but this doesn't trigger meltdown. For example uranium needs to reach 2,800ºC to melt and to trigger meltdown, it needs the same temperature or more.


plant's team


Headquarters for nuclear disaster control in Fukushima. Local residents are anxious about not being able to get proper information.


map eng


A fire also briefly broke out at the plant's reactor 4 on the 15th.  It's believed to have led to radioactive leak and the local residents within 20km from the nuclear plants were evacuated.

The fire in the rector 4 has been on and off. Spent nuclear fuel is heating up and Nuclear and Industrial Safety Agency has confirmed that fuel pool is boiling.

wind and levelAt the moment of the first fire, the radiation level of the rector 4 was extremely high at 400mm Sv per hour and it was too dangerous to enter. Tokyo Electricity has decided to ask US army to sprinkle the water by helicopter. As soon as they get agreement, the operation will be carried out on Wednesday. 



Radiation level in the air has also increased in Tokyo area, too because of the wind from the north. Although the Ministry of Education, Culture, Sports, Science and Technology announces that the level isn't harmless to human body, it is higher than usual.


Now twice a day, in the morning and in the afternoon, the level of radiation is officially announced. In Shinjuku in Tokyo today, it ditected 21 times more radioactive of 0.809 micro sievert at the highest.


This sievert, people receive about 2.4m Sv of radioactive a year means 0.274 micro Sv per hour. As a reference, you can get 6.9 mm Sv from a chest CT scan. People who work at the nuclear plants may receive 50mm Sv at the highest a year. If you receive 500mm Sv, lymph cell will start reducing and with 1,000 mm Sv, you will get nausea or feeling of vomit.

prime minister



The Prime Minister, Naoto Kan has advised to the people within 20km from the plants to evacuate. Also to those who live in 20-30km, to stay inside the house and close the windows. 



Today, on the 15h, Japanese government has requested to IAEA (International Atomic Energy Agency) to provide expert missions.   They are investigating Fukushima nuclear plants and its rectors and updats every two hours.


Of course Japanese people are preocupied despite of the announcement from the government saying the level is harmless. Many confusing informations are flying. 

One of them was to drink iodine or gargle contains iodine to avoid contamination. Later it was advised not to do.

Under these circumstances, the most dangerous thing is to get panicked People are on the verge and easy to believe any information. Yes, it is scary but hope they stay calm and pay attention to what to believe.

radiation check


ASN (French Nuclear Safety Authority) made a comment that this disaster of Fukushima Daiichi nuclear plant was the second most severe accident and considers as level 6 by INES (the International Nuclear and Radiological Event Scale).

The most severe nuclear accident in the history was Chernobyl in 1986 and was level 7. Three Mile Island accident happened in 1979 was leveled at 5.


visit for checkThere are so many informations about the nuclear plants and it's difficult to know what to believe. Now this accident has triggered big discussion over nuclear plants in the world. It has been controversal but now it's even more. German has shut down their nuclear plants and the countries which have nuclear plants will strengthen the inspection on older rectors. This experience makes the world to think the safety and the necessity of nuclear plants.


Iromegane will continue fixing on the movement of Fukushima Daiichi Nuclear Plants. Repeat, despite of higher level of radiation level, it is falling. The provincias around Fukushima have started receiving refugees. At the moment, in the areas more than 20km from the plant, the level of radiation is harmless.

Leave a reply

Your email address will not be published. Required fields are marked *