At the site of nuclear accidents,fjrefjghters situated near nuclear power plants(NPPs)assume responsibility for suppressing fjres and rescuing workers from leaked radiation.Their timely responses to nuclear emergencie...At the site of nuclear accidents,fjrefjghters situated near nuclear power plants(NPPs)assume responsibility for suppressing fjres and rescuing workers from leaked radiation.Their timely responses to nuclear emergencies can prevent or minimize the catastrophic impacts of these accidents.Despite their important role in nuclear emergency management,little is known about the factors that influence fjrefjghters'nuclear emergency responses.We recruited 179 Korean fjrefjghters(96%male)situated near NPPs.We examined whether and how knowledge regarding nuclear accidents and trust in the authorities operating nuclear power plants were related to fjrefjghters'risk perceptions of nuclear accidents to predict their preparedness and willingness to respond to nuclear emergencies.Our results indicate that trust moderated the effect of knowledge on the perceived risk of nuclear accidents,and that the perceived risk mediated the relationship between knowledge and fjrefjghters'preparedness and willingness to respond to nuclear emergencies.The results revealed a pattern of moderated mediation,in which perceived risk mediated the indirect effect of knowledge on preparedness and willingness when the fjrefjghters'trust was low,but not when it was high.展开更多
Simulation of phased array beams in dovetail and austenitic welds is conducted to optimize the setup of phased array ultrasonic testing（PAUT）.To simulate the beam in such material with complex geometry or with chara...Simulation of phased array beams in dovetail and austenitic welds is conducted to optimize the setup of phased array ultrasonic testing（PAUT）.To simulate the beam in such material with complex geometry or with characteristic of anisotropy and inhomogeneity, firstly,linear phased multi-Gaussian beam（LPMGB） models are introduced and discussed. Then,in the case of dovetail,wedge is designed to maximize the stable amplitude of the beam along the steering path;in the case of austenitic weld,modified focal law are developed to solve the problem of beam screwing and defocusing due to the material properties.To verify the effectiveness of the modified focal law,beam fields are calculated using LPMGB model in austenitic welds.展开更多
基金supported by the Nuclear Safety Research Program through the Korea Foundation of Nuclear Safety (KOFONS) using the financial resources granted by the Nuclear Safety and Security Commission (NSSC) of the Republic of Korea (No. 1605002)a 2019 Research Grant from Kangwon National University
文摘At the site of nuclear accidents,fjrefjghters situated near nuclear power plants(NPPs)assume responsibility for suppressing fjres and rescuing workers from leaked radiation.Their timely responses to nuclear emergencies can prevent or minimize the catastrophic impacts of these accidents.Despite their important role in nuclear emergency management,little is known about the factors that influence fjrefjghters'nuclear emergency responses.We recruited 179 Korean fjrefjghters(96%male)situated near NPPs.We examined whether and how knowledge regarding nuclear accidents and trust in the authorities operating nuclear power plants were related to fjrefjghters'risk perceptions of nuclear accidents to predict their preparedness and willingness to respond to nuclear emergencies.Our results indicate that trust moderated the effect of knowledge on the perceived risk of nuclear accidents,and that the perceived risk mediated the relationship between knowledge and fjrefjghters'preparedness and willingness to respond to nuclear emergencies.The results revealed a pattern of moderated mediation,in which perceived risk mediated the indirect effect of knowledge on preparedness and willingness when the fjrefjghters'trust was low,but not when it was high.
基金supported by the Korea Science and Engineering Foundation(KOSEF) grant funded by the Korea government(MOST)(2006-01653)NSFC-NRF,and by the National Natural Science Foundation of China(NSFC)
文摘Simulation of phased array beams in dovetail and austenitic welds is conducted to optimize the setup of phased array ultrasonic testing（PAUT）.To simulate the beam in such material with complex geometry or with characteristic of anisotropy and inhomogeneity, firstly,linear phased multi-Gaussian beam（LPMGB） models are introduced and discussed. Then,in the case of dovetail,wedge is designed to maximize the stable amplitude of the beam along the steering path;in the case of austenitic weld,modified focal law are developed to solve the problem of beam screwing and defocusing due to the material properties.To verify the effectiveness of the modified focal law,beam fields are calculated using LPMGB model in austenitic welds.
