Safety Risk Management Of CA20 Module Hoisting In AP1000 Nuclear Power Plant

China’s energy structure is gradually adjusting to the development of a clean,low-carbon,safe and efficient green energy system.As one of the typical representatives of third-generation nuclear power,the Advanced Passive Pressurized Water Reactor technology has a promising development prospect.As a typical feature of the construction process of AP1000 nuclear power plant,modular construction has a lot of advantages,but also leads to a significant increase in large-scale module hoisting operations and cross operations.Compared with the second-generation Passive Pressurized Water nuclear power plant,the difficulty of modular construction in AP1000 nuclear power plant is significantly increased,which brings greater safety risks and challenges in the construction process.This paper is researched under this background.Taking CA20 module hoisting of AP1000 nuclear power project as an example,this paper analyzes the safety risks in the process of module hoisting.Firstly,the paper states the general situation and operation process of CA20 module hoisting,and extracts the difficulties of safety management in the module hoisting operation based on the literature and work experience,which include difficult multitask coordination of interface,transport vehicle management,road management of bulk transport,2600 T large crane management,management of anti-deformation control and management of installation in place.Secondly,on the basis of summary of safety risk identification,this paper illustrates and applicability of the Operation Safety Analysis Method on hoisting risk identification of CA20 module,and sets up a work group on the module hoisting operation safety analysis.Through the communication meetings,the paper identifies the safety risk factors existing in CA20 module hoisting operation,and then uses the expert questionnaire survey and risk matrix analysis to conduct risk assessment of identified safety risk factors,which forms the list of important safety risk factors of CA20 module hoisting operation.Finally,the paper classifies and summarizes the important safety risk factors according to the hazardous and harmful factors in production process in four categories,which are human factors,material factors,management factors and environmental factors,and implement the countermeasures of safety risk,which are optimizing organization and responsibilities,effective special safety training,overall special safety inspection,rigorous safety guard scheme,practical safety communication and complete emergency rescue.In the end,the effectiveness of countermeasures are analyzed and proved by expert scoring method.By means of safety risk identification and risk evaluation of CA20 module hoisting operation in AP1000 nuclear power project,this paper implements the practical control countermeasures of the module hoisting operation safety risk,which improves the safety management level of hoisting operation of large-scale module,and provides reference for module hoisting operation safety risk control in other similar projects,and also offers method and thought of safety management of subsequent large-scale module hoisting operation.