Analysis and Test of Respond Time of Nuclear Power Plant Digital Control System to Reactor Trip

The paper gives a brief introduction on the structure of nuclear power plant reactor protect system and the data processing link to actuate the reactor trip.Theoretical analysis of the response time of reactor trip processing is conducted.Test philosophy is established and relative test device is designed,and the test work is conducted.The statistical analysis of the experimental data from test work shows that,the experimental maximum data of reactor trip response time is 144.8 ms while the theoretic maximum data is 149.1 ms.The experimental data accords with the normal distribution,of which the average value is 120.6 ms,and the variance is 90.1 ms.