The real-time continuous air-absorbed dose rate monitoring results of the automatic monitoring stations for radiation environments in national capital cities and some prefecture-level cities announced on March 15 at 15th March showed that all city monitoring values ​​were within their natural background levels, and Wuhan was in the country. Relatively low radiation environment. The level of radiation environment in China has not been affected by the nuclear accident in Japan.
According to the analysis of the expert group of China's National Nuclear Accident Emergency Coordination Committee, after diluted radioactive materials through the atmosphere and the ocean, it will not affect the public health of our country. At present, relevant departments and agencies in our country are closely monitoring, respond to the work in a timely and effective manner, and inform the public in a timely manner.
China's standards: The amount of radiation each person receives each year should be less than 2.7 millisieverts.
Take a 10-hour flight and receive 30 microsieverts of radiation.
Safety: short-term radiation <100 millisievert death: short-term radiation> 4000 millisievert
Micro-Sev: A unit that measures the level of radiation exposure. The standard unit for radioactive dose is called Sev, defined as 1 Joule of energy per kilogram of body tissue (energy released during radiation). 1 millisievert = 1000 microsieverts.
How far does nuclear radiation affect?
U.S. Expert Forecasts Worst Results Result in tens of thousands of people suffering from cancer
Nuclear explosion occurred at the explosion of the nuclear power plant in Fukushima, and many people have been exposed to nuclear radiation. The "nuclear crisis" raised concerns even more than the major earthquakes and tsunami. What kind of harm will the human body have from the pollution caused by the leakage? How should we respond to the nuclear radiation generated after a nuclear leak?
“The human body is generally divided into radioactive contamination in vitro and in vivo when exposed to radiation. If the radioactive contaminants fall on clothes, they can be removed by cleaning and concentrated treatment.†Ye Qianrong, professor at Tokai University in Japan, said that if radioactive dust is inhaled once, the hazard is serious. Now. "If irradiated cells are altered rather than killed, the results will be significantly different. Although there is a highly effective defense mechanism in the body, a clonal cell that is changed but is produced by the surviving cells during the regeneration process After a so-called incubation period, it can lead to cancer, and the chance of cancer induction is considered to be proportional to the dose received."
While drinking contaminated groundwater and eating out of the contaminated soil, some radioactive elements will be deposited in the body, which may cause various diseases. "Inhalation of radioactive contaminants may have a greater impact."
Some American experts have pointed out that the worst result of Japan’s nuclear radiation is that “tens of thousands of people die from cancer†and widespread areas around nuclear power plants are unfit for human habitation in the coming decades.
Hydrogen explosion
The explosion at the Fukushima nuclear power plant is an explosion that occurs after hydrogen and oxygen are mixed. It is a chemical reaction. The nuclear explosion is a nuclear bomb like a nuclear bomb or a hydrogen bomb. It is caused by a nuclear fission chain reaction and is a physical reaction.
Nuclear power plants cannot produce similar nuclear explosions. Nuclear power plants use very low concentrations of nuclear fuel. Nuclear bombs can explode. Nuclear power plants cannot explode like alcohol is flammable and beer is inflammable. The amount of nuclear pollution leaked and its scope of influence is much smaller than that of a nuclear explosion.
China Nuclear Power Station "door threshold"
Higher than the world average
Xu Wei, chief expert of China National Nuclear Corporation, said that most of the nuclear power reactors used in China's nuclear power bases are pressurized water reactors, and their safety performance is better than that of Japanese nuclear power plants. The “threshold†is higher than the world average.
The Sanmen nuclear power plant currently under construction uses the third-generation AP1000 nuclear power technology. There are several thousands of tons of water tanks above the reactor. If an emergency similar to a Japanese nuclear power plant is encountered, AC power and emergency generators are not needed. Just use these tanks. The water will allow the temperature of the reactor to fall, thereby restoring the nuclear power plant to a safe state.
Country reactions
Germany: Thoroughly checked the safety of all 17 nuclear power plants and suspended the three-month plan to extend the operating period of nuclear power plants passed last year.
Russia: Some 11,000 local residents have been evacuated in the Kuril Islands area.
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