Paper Title:
Failure Probability Estimation of Pressure Tube Using Failure Assessment Diagram
  Abstract

Pressure tubes are major component of nuclear reactor, but only selected samples are periodically examined due to numerous numbers of tubes. Pressure tube material gradually pick up deuterium, as such are susceptible to a crack initiation and propagation process called delayed hydride cracking (DHC), which is the characteristic of pressure tube integrity evaluation. If cracks are not detected, such a cracking mechanism could lead to unstable rupture of the pressure tube. Up to this time, integrity evaluations are performed using conventional deterministic approaches. So it is expected that the results obtained are too conservative to perform a rational evaluation of lifetime. In this respect, a probabilistic safety assessment method is more appropriate for the assessment of overall pressure tube safety. This paper describes failure probability estimation of the pressure tubes using probabilistic fracture mechanics. Failure assessment diagram (FAD) of pressure tube material is proposed and applied in the probabilistic analysis. In all the analyses, failure probabilities are calculated using the Monte Carlo simulation. As a result of analysis, failure probabilities for various conditions are calculated, and examined application of FAD and LBB concept.

  Info
Periodical
Solid State Phenomena (Volume 120)
Edited by
Young-Jin Kim
Pages
37-42
DOI
10.4028/www.scientific.net/SSP.120.37
Citation
J. S. Lee, S. L. Kwak, C. R. Pyo, "Failure Probability Estimation of Pressure Tube Using Failure Assessment Diagram", Solid State Phenomena, Vol. 120, pp. 37-42, 2007
Online since
February 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: S. Gerguri, L.J. Fellows, J.F. Durodola, N.A. Fellows, A.R. Hutchinson, T. Dickerson
Abstract:High stress gradients occur at metal-to-ceramic joints due to the different thermal and mechanical properties of the materials. In some...
113
Authors: Do Hyung Kim, Jin Won Kim, Yeon Soo Na, Chi Yong Park
Abstract:The objective of this study is to develop a local failure criterion at wall-thinning defect of piping components. For this purpose, a series...
1165
Authors: Yan Gang Zhao, Yue Feng Geng, Kazuhiro Yoshihara
Abstract:In ultimate asseismic design of ductile frame structures, plastic deformation and plastic hinge are generally permitted, and some preferred...
1393
Authors: Jian Yu Zhang, Yue Fu, Li Bin Zhao
Abstract:Stitched woven composite π joints and paralleled samples without stitching were investigated by numerical analysis under tensile loading. The...
1611
Authors: Cha Yun Kimyong, Sontipee Aimmanee, Vitoon Uthaisangsuk, Wishsanuruk Wechsatol
Abstract:Fiber-reinforced composite materials (FRC) are used in a wide range of applications, since FRC exhibits higher strength-to-density ratio in...
541