BROWSE

Related Researcher

Author

Kim, Ji Hyun
UNIST Nuclear Innovative Materials Laboratory(UNIMAT)
Research Interests
  • High temperature water corrosion

ITEM VIEW & DOWNLOAD

Development of wall thinning screening system and its application to a commercial nuclear power plant

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Development of wall thinning screening system and its application to a commercial nuclear power plant
Author
Ryu, Kyung HaHwang, Il SoonKim, Ji Hyun
Keywords
CURRENT POTENTIAL DROP
Issue Date
201312
Publisher
ELSEVIER SCIENCE SA
Citation
NUCLEAR ENGINEERING AND DESIGN, v.265, no., pp.591 - 598
Abstract
A new non-destructive evaluation (NDE) method has been developed for metal pipes for the detection wall thinning. The method has been showed to be suitable for applications to electric power generation plants where flow accelerated corrosion (FAC) of carbon steel piping is a significant cause of increased maintenance and plant personnel casualty. The wall thinning screening system (WalSS) was developed in two major phases. In the first phase, the equipotential switching direct current potential drop (ES-DCPD) method was developed for piping wall (Ryu et al., 2008a, 2010). In the second phase, in this paper, a quantitative detection criteria was developed. The relative ES-DCPD change of 3.8% has been defined as the screening criteria for wall thinning schematization. This criteria means that the component with measured ES-DCPD change greater than 3.8% is called for a more comprehensive examination. In the criteria development, all variables were taken into consideration based on commercial plant piping inspection data such as initial thickness distributions, wall thinning shape and nominal thickness. The developed WalSS based on ES-DCPD was applied to a moisture separator reheater (MSR) drain line of a commercial nuclear power plant (NPP) during a scheduled overhaul. The measured ES-DCPD change was 2.16%, which is lower than the ES-DCPD criteria, identifying the pipe having adequate wall thickness. This is confirmed by site thickness inspection using ultrasonic technique (UT).
URI
Go to Link
DOI
http://dx.doi.org/10.1016/j.nucengdes.2013.09.021
ISSN
0029-5493
Appears in Collections:
MNE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU