This standard stipulates the classification of operation and accident conditions of pressurized water reactor nuclear power plants based on the frequency of events occurring in pressurized water reactor nuclear power plants and the consequences of the events: Condition 1 - normal operation; Condition 2 - medium frequency Accident; working condition 3 - rare accident, working condition 4 - extreme accident. This standard is applicable to the classification of working conditions encountered by various types of work in pressurized water reactor nuclear power plants. Operating conditions or accidents not included in this standard can be classified into appropriate working condition categories based on definitions and examples.
EJ/T 312-1988 history
2011NB/T 20035-2011 Categorization of conditions of PWR nuclear power plants
1988EJ/T 312-1988 Classification of operating and accident conditions in pressurized water reactor nuclear power plants
EJ/T 312-1988 Classification of operating and accident conditions in pressurized water reactor nuclear power plants was changed to NB/T 20035-2011 Categorization of conditions of PWR nuclear power plants.