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http://dx.doi.org/10.20466/KPVP.2017.13.1.054

Evaluation of Blast Wave and Pipe Whip Effects According to High Energy Line Break Locations  

Kim, Seung Hyun (경희대학교 원자력공학과)
Chang, Yoon-Suk (경희대학교 원자력공학과)
Choi, Choengryul ((주)엘쏠텍)
Kim, Won Tae ((주)아리텍)
Publication Information
Transactions of the Korean Society of Pressure Vessels and Piping / v.13, no.1, 2017 , pp. 54-60 More about this Journal
Abstract
When a sudden rupture occurs in high energy lines, ejection of inner fluid with high temperature and pressure causes blast wave as well as thrust forces on the ruptured pipe itself. The present study is to examine pipe whip behaviors and blast wave phenomena under postulated pipe break conditions. In this context, typical numerical models were generated by taking a MSL (Main Steam Line) piping, a steam generator and containment building. Subsequently, numerical analyses were carried out by changing break locations; one is pipe whip analyses to assess displacements and stresses of the broken pipe due to the thrust force. The other is blast wave analyses to evaluate the broken pipe due to the blast wave by considering the pipe whip. As a result, the stress value of the steam generator increased by about 7~21% and von Mises stress of steam generator outlet nozzle exceeded the yield strength of the material. In the displacement results, rapid movement of pipe occurred at 0.1 sec due to the blast wave, and the maximum displacement increased by about 2~9%.
Keywords
Balst wave; High energy line break; Main steam line; Pipe whip;
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