Overall design phase safety analysis method for advanced reactor

Abstract

The invention provides an overall design phase safety analysis method for an advanced reactor. The method comprises the following step: in step S1, advantages and shortcomings of design are identified via a qualitative safety characteristic inspection tool and advices are given accordingly; in step S2, physical phenomena in a specific situation and importance degree rankings thereof are evaluated via phenomenon identification and a ranking table; in step S3, via a defense function tree form analysis system, challenges faced by safety objects and safety functions are evaluated; in step S4, according to execution results of steps S1-S3, whether safety measures and system design are reasonable is confirmed, and preliminary design is completed. The method disclosed in the invention is based on safety regulations, defense in depth and basic safety functions; opinions of experts in different fields are considered according to an information base of system design, accident analysis, experiment data and code analysis; comprehensive transverse and longitudinal analysis results can be quickly obtained on anything from systems to parts or even in-depth partial layers according to research demand and purposes.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant safety analysis, in particular to a safety analysis method used in the overall design stage of an advanced reactor. Background technique [0002] At present, the traditional methods of reactor safety analysis mainly include deterministic accident analysis method and probabilistic accident analysis method. The deterministic accident analysis method is mainly used in the analysis of design basis accidents. The deterministic safety analysis method takes system and component failure or personnel error as the initiating event, selects a conservative or realistic model and a series of corresponding rules and assumptions (such as single fault assumption, conservative initial state), analyze and calculate the response of related systems of the nuclear power plant, and obtain the radiological consequences of the accident. Among them, the conservative model considers the worst case, and thus o...

AI Technical Summary

Problems solved by technology

[0005] 1. It is mainly applicable to the preliminary design stage and the construction drawing design stage; as for the overall design stage, since the detailed parameters of the reactor (such as the parameters of the system and components) have not yet been obtained, it is impossible to carry out deterministic accident analysis and probabilistic accident analysis;

[0006] 2. Its implementation requires a large amount of work, and in the overall design stage of the reactor, the design plan may be revised repeatedly, resulting in a double increase in the workload of accident analysis and elimination of subversive factors in the plan at this stage, and the difficulty of completing the work is also doubled Increase;

Images