Modeling For Healthy Operation State Of Nuclear Power Plant And Research On Visual Analysis Method

Nuclear industry focuses on solving nuclear safety problem since it came into being.After nuclear accident happened in Fukushima,the safety problem of nuclear power plant has aroused wide attention.The operation stage of nuclear power plant is the key link ensuring nuclear safety directly,one of the main operation tasks of operation is realizing the safety target of nuclear power plant.This nuclear power plant is with complicated system and great monitoring information.Local information of nuclear power plant is mainly monitored in operation;the master of operation state for nuclear power plant is inadequate.To timely identify the deviation and degradation of operation state and ensure the safe and stable operation of nuclear power plant,this paper has established evaluation model suitable for the healthy operation state of nuclear power plant based on the basic theory of claim-argument-evidence(CAE)in safety argument,through simplification and normalization of goal structure notation(GSN)in CAE method and integrating the characteristic state parameter in operation.This healthy state evaluation model takes the safe operation of nuclear power plant as the main target;connect the main safety functions,sub functions and basic monitoring information of this nuclear power plant as a hierarchical node evaluation structure with weight allocation and health evaluation value information.For the situation that the healthy state of come evaluation factors deteriorates seriously and initial distribution weight is small in operation process,this paper has improved variable weight analytic hierarchy process and this algorithm allocates weight in real time according to the health evaluation value of evaluation factors in the model,increases weight for evaluation factor where deterioration happens to health evaluation value properly and ensures close fitting between model evaluation result and real operation status of nuclear.This paper has developed a set of visual monitoring system for healthy nuclear operation state independently based on above evaluation model and algorithm and applied information visualization theory firstly to nuclear power plant operation monitoring field.This system integrates monitoring data produced in the real time operation process of this nuclear power plant with the proposed evaluation model and variable weight analytic hierarchy process organically into bottom data processing and operation module;as for the data display module interacting with user,this system adopts multi-scale and multi-view linkage visual monitoring method based on the features of this evaluation model hierarchy to make real time monitoring for the healthy operation state of nuclear power,makes use of the image areas and colors to present the weight and healthy state of evaluation factor in evaluation model and makes users have an intuitive and clear perception for the information of evaluation factor.At the same time,the system provides numerous interaction means,helps users to make real time monitoring,analyzes the weight and healthy state of each main safety function,sub function and basic monitoring information in nuclear power operation and enables the users well perceive the healthy operation state of nuclear power plant both in general and in details.At the same time,system using methods have been introduced in details in specific case scenarios and user research has been made and better feedback has been attained.