At present,the nuclear power units in operation and under construction in Tianwan Nuclear Power Plant(TNPP)include three different types of units,namely,VVER-1000(Units 1-4),M310(Units 5 and 6)and VVER-1200(Units 7 and 8),covering a variety of nuclear power design technical directions.Under the multi-unit group operation mode,TNPP has carried out research on the optimization of operatng safety management strategy based on the design characteristics of different units,and established a unified Symptom-oriented Emergency Operating Procedure(SEOP)system for nuclear power units,which has the characteristics of accurate and rapid Event-oriented Procedure(EOP)and wide coverage of State-oriented Emergency Operating Procedure(SOP).At the same time,the technical framework of the new version of Severe Accident Management Guideline(SAMG)implemented by Units 7 and 8 contains more comprehensive ability to deal with serious accidents and simpler diagnostic guidelines,which can effectively alleviate the consequences of serious accidents in nuclear power plants.The new SAMG technical framework can also be applied to other units of TNPP.
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