Development of a short-term failure assessment of high density polyethylene pipe welds - Application of the limit load analysis - Application o

Ho Wan Ryu, Jae Jun Han, Yun Jae Kim, Jong Sung Kim, Jeong Hyeon Kim, Chang Heui Jang

Research output: Contribution to journalArticle

Abstract

In the US, the number of cases of subterranean water contamination from tritium leaking through a damaged buried nuclear power plant pipe continues to increase, and the degradation of the buried metal piping is emerging as a major issue. A pipe blocked from corrosion and/or degradation can lead to loss of cooling capacity in safety-related piping resulting in critical issues related to the safety and integrity of nuclear power plant operation. The ASME Boiler and Pressure Vessel Codes Committee (BPVC) has recently approved Code Case N-755 that describes the requirements for the use of polyethylene (PE) pipe for the construction of Section III, Division 1 Class 3 buried piping systems for service water applications in nuclear power plants. This paper contains tensile and slow crack growth (SCG) test results for high-density polyethylene (HDPE) pipe welds under the environmental conditions of a nuclear power plant. Based on these tests, the fracture surface of the PENT specimen was analyzed, and the fracture mechanisms of each fracture area were determined. Finally, by using 3D finite element analysis, limit loads of HDPE related to premature failure were verified.

Original languageEnglish
Pages (from-to)405-413
Number of pages9
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume39
Issue number4
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

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Keywords

  • Failure Assessment
  • High Density Polyethylene
  • Limit Loads
  • Pennsylvania Edge Notch Tensile(PENT)
  • Piping
  • Slow Crack Growth
  • Weld

ASJC Scopus subject areas

  • Mechanical Engineering

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