Investigation into thermal stress characteristics of pipe-in-pipe under high temperature condition

Si Hwa Jeong, Min Gu Won, Nam Su Huh, Yun Jae Kim, Young Jin Oh, Jae Boong Choi

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this paper, the thermal stress characteristics of the pipe-in-pipe(PIP) system under high temperature condition are analyzed. The PIP is a type of pipe applied in sodium-cooled faster reactor(SFR) and has a different geometry from a single pipe. In particular, under the high temperature condition of the SFR, the high thermal stress is generated due to the temperature gradient occurring between the inner pipe and outer pipe. To investigate the thermal stress characteristics, three cases are considered according to geometry of the support. The fully constrained support and intermediate support are considered for case 1 and 2, respectively. For case 3, both supports are applied to the actual curved pipe. The finite element(FE) analyses are performed in two steps for each case. Firstly, the heat transfer analysis is carried out considering the thermal conduction, convection and radiation conditions. From the heat transfer analysis, the temperature distribution results in the piping system are obtained. Secondly, the structural analysis is performed considering the temperature distribution results and boundary conditions. Finally, the effects of the geometric characteristics on the thermal stress in the PIP system are analyzed.

Original languageEnglish
Title of host publicationDesign and Analysis
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791851623
Publication statusPublished - 2018
Externally publishedYes
EventASME 2018 Pressure Vessels and Piping Conference, PVP 2018 - Prague, Czech Republic
Duration: 2018 Jul 152018 Jul 20

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
ISSN (Print)0277-027X


ConferenceASME 2018 Pressure Vessels and Piping Conference, PVP 2018
Country/TerritoryCzech Republic

ASJC Scopus subject areas

  • Mechanical Engineering


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