Accident Analysis and Sensitivity Study of LOCA Superimposed ATWS in Advanced PWR Nuclear Power Plant
In order to analyze the transient response of nuclear power plant after the LOCA superimposed anticipated transients without scram,and study the accident mitigation path under different accident scenarios,this paper takes domestic advanced PWR nuclear power plant as the case of study,establishes the nuclear power plant model by using system analysis code,and studies the transient characteristics of the power plant under the accident condition.The sensitivity analysis is carried out,and the conclusion is as follows.For the extreme small break condition,at least one pressurizer safety valve and one emergency water supply system should be effective to avoid the primary overpressure in the early stage of the accident.For relatively large small break conditions,at least one emergency water supply system,one medium pressure safety injection system and one emergency boron injection system should be effective to alleviate the accident.For the medium break condition,if the size of the break is relatively small,it is necessary to have one emergency water supply system,one medium pressure safety injection system,one accumulator,one low pressure safety injection system and one emergency boron injection system to alleviate the accident.If the size of the break is large,only one medium pressure safety injection system,one accumulator,and one low pressure safety injection system are required to alleviate the accident.
LOCAAnticipated transients without scramAccident analysis
NETL
NSTL
万方数据
