China Experimental Fast Reactor Argon Gas Distribution System Hardware Part Time Computer Monitoring System Reliability Analysis

There are two important aspects in the computer surveillance and control (S&C) system in CEFR(China Experimental Fast Reactor) , the one is reliability, the other is techno-performance。 But in the real design , We always emphasize the fact of techno-performance。 Ignoring the reliability will deteriorate the system's function, and the repair cost for system will rise 。 To the computer S&C (a new PLC control system in nuclear power station) system of CEFR, the key to improve the reliability is not the high quality and costly component, which will only increase the cost greatly。 We should analyse the reliability of S&C system, and definitude the point of the weakness chain。 The analyse result will show us "the important module" to which we must pay attention, and we must consider the questions of redundance 。Two reliability analysis methods is used in this paper。 1: FTA(Fault Tree Analysis) , 2: GO methodology。 These two methods have different modeling in analysis。 FTA's top event is the failure of the system 。 This method can get MCS(Minimum Cut Set) through looking up all the possible faults that cause it's up level fault。 "GO methodology" will show us the system's customary appearance。 The elements in "GO" can correspond the system's elements almost。 It will clearly describe the relationship between the parts of system。In this paper , firstly, the first argon distributing system's computer S&C system's reliability is calculated by FTA; at the same time, the MCS, the import of the parts and the CCF(Common Cause Failure)is analysed。 Then, " GO methodology" is used to validated the resulto By using the simulink (Matlab simulation flat) in the computation and analysis creative, the "GO methodology" application is extended。 Computation and analysis based on SIMULINK is a convenient ,quick and effective。The results show that the probability of the first argon distribute system's computer S&C is 2.68E-004。 And the result is appraised by two probability methodology。This paper also gives some good advice for improving design period maintenance ,and the result is imported to the work of CEFR's other system's probability analysis。Finally ,this paper explain the usage of two probability methodologys in probability'sanalysis , and bring forward some idea of future use。 The sofeware's probability is also mentioned at the end of the paper。...