Research On Automatic Test For Safety Digital Control System Of Nuclear Power Plant

A reactor protection system(RPS)is a set of nuclear safety components in a nuclear power plant designed to safely shut down the reactor and protect the integrity of the three nuclear safety barrier(including fuel cladding,primary loop and containment).When the parameters of the reactor meet or exceed the limit setpoint,the reactor protection system will shut down the reactor or start the engineering safety feature as if necessary.In the safety classification(1E class)of electrical equipment,reactor protection system is defined as safety-class equipment for its importance in the nuclear power plant.Therefore,reactor protection system has to meet higher requirement in its quality,safety and reliability.Before leaving the factory,the reactor protection system has to be strictly tested,which put forward the requirements on its testing management,technology and quality.The test on reactor protection system is the most important barrier before its application.As the reactor protection system is the key technology for the manufacturing the device in nuclear power plants,many foreign countries took the measure of technology blockade.Although the research on reactor protection system just started,and relevant testing skills are still in the research stage in China.Thus,relevant research and development institutions have to improve their testing level through technology method.This paper took a systematic research on automated test technology based on the summary of testing experience of reactor protection system in nuclear power plant.The research group established automated test technology of the testing system and started a research on automated test technology of reactor protection system in the nuclear power plant.Focus on the purpose of improving testing quality,the research group selected some of the typical test items concerned,and modified the test preparation,test engineering,test data and other segments,and developed a series products on automated test.Currently,research findings on automated test technology have been successfully applied on many CPR1000 reactor protection systems testing.The application and improvement of research findings has greatly enhanced the testing quality and efficiency.Also,the research group considered the portability of the findings and applied the technology on PWR nuclear power plant of ACPR1000,AP1000,and many other reactor protection systems,such as the high temperature gas cooled reactor(HTR).