Effects of geometry of reactor pressure vessel upper head control rod drive mechanism penetration nozzles on J-Groove weld residual stress

Ju Hee Kim, Yun Jae Kim, Sung Ho Lee, Hong Yeol Bae, Chang Young Oh, Ji Soo Kim, Nam Young Hur, Heung Bae Park, Seung Geon Lee, Jong Sung Kim, Nam Su Huh

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In pressurized water reactors (PWRs), the reactor pressure vessel (RPV) upper head contains numerous control re drive mechanism (CRDM) nozzles. In the last 10 years, the incidences of cracking in alloy 600 CRDM nozzles and the associated welds has increased significantly. Several axial and circumferential cracks have been found in CRDM nozzles European PWRs and U.S. nuclear power plants. These cracks are caused by primary water stress corrosion crackir (PWSCC) and have been shown to be driven by welding residual stresses and operational stresses in the weld regio Therefore, detailed finite-element (FE) simulations for the Korea Nuclear Reactor Pressure Vessel have been conducted order to predict the magnitudes of the weld residual stresses in the tube materials. In particular, die weld residual stress resul are compared in terms for nozzle location, geometry factor r 0 /t, geometry of fillet, and adjacent nozzle.

Original languageEnglish
Pages (from-to)1337-1345
Number of pages9
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume35
Issue number10
DOIs
Publication statusPublished - 2011 Jan 1
Externally publishedYes

Fingerprint

Control rods
Pressure vessels
Residual stresses
Nozzles
Welds
Geometry
Pressurized water reactors
Cracks
Nuclear reactors
Nuclear power plants
Welding
Corrosion
Water

Keywords

  • CRDM
  • Fe analysis
  • J-GrooveWeld
  • PWSCC
  • RPV

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Effects of geometry of reactor pressure vessel upper head control rod drive mechanism penetration nozzles on J-Groove weld residual stress. / Kim, Ju Hee; Kim, Yun Jae; Lee, Sung Ho; Bae, Hong Yeol; Oh, Chang Young; Kim, Ji Soo; Hur, Nam Young; Park, Heung Bae; Lee, Seung Geon; Kim, Jong Sung; Huh, Nam Su.

In: Transactions of the Korean Society of Mechanical Engineers, A, Vol. 35, No. 10, 01.01.2011, p. 1337-1345.

Research output: Contribution to journalArticle

Kim, Ju Hee ; Kim, Yun Jae ; Lee, Sung Ho ; Bae, Hong Yeol ; Oh, Chang Young ; Kim, Ji Soo ; Hur, Nam Young ; Park, Heung Bae ; Lee, Seung Geon ; Kim, Jong Sung ; Huh, Nam Su. / Effects of geometry of reactor pressure vessel upper head control rod drive mechanism penetration nozzles on J-Groove weld residual stress. In: Transactions of the Korean Society of Mechanical Engineers, A. 2011 ; Vol. 35, No. 10. pp. 1337-1345.
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AU - Kim, Ji Soo

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