The knowledge of radiation protection: Nuclear radiation is divided into seven grades

The knowledge of radiation protection: Nuclear radiation is divided into seven grades
The knowledge of radiation protection: Nuclear radiation is divided into seven grades
Nuclear and radiating the accident, it is not one kind in accordance with expectation, take place healthy safe to society and a public one, have great accident that endangered to country and personal property,etc. to environment suddenly. It involves influencing, relate to radioactivity with radiation nuclearly. For have one and media and nuclear and radiation accident that the public happen worldwide ' Incident) And the characteristic, common yardstick that the consequence pays and communicates, International Atomic Energy Agency and OECD Nuclear Energy Agency have made the international nuclear and radiation incident hierarchical table (INES) . INES divides the incident into 7 grades. 1- 3 grades are called " The incident " ,4- 7 grades are called " The accident " ,There is no incident of the safe meaning and is called 0 grades. Every incident is arranged according to the severe increase. Among them, the incident is divided into unusual, general incident and major event again. The accident is divided for the limited accident of coverage ' 4 grades) , coverage than old accident ( 5 grades) , great the accident ' 6 grades) With the extremely serious accident ' 7 grades) . Japanese atomic energy security courtyard personage reveals on April 12, already according to the international nuclear incident hierarchical table, fix the first nuclear power station accident of Fukushima for 7 grades.


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