Evaluation of Creep Properties of Alloy 690 Steam Generator Tubes at High Temperature Using Tube Specimen

2019 ◽  
Author(s):  
Jongmin Kim ◽  
Woogon Kim ◽  
Minchul Kim
Keyword(s):  
High Temperature ◽  
Steam Generator ◽  
Creep Test ◽  
Rupture Life ◽  
Creep Rupture ◽  
Severe Accident ◽  
High Temperature Creep ◽  
Creep Life ◽  
Temperature Creep ◽  
Alloy 690

Abstract Thermally induced steam generator (SG) tube failures caused by hot gases from a damaged reactor core can result in a containment bypass event and may lead to release of fission products to the environment. A typical severe accident scenario is a station blackout (SBO) with loss of auxiliary feedwater. Alloy 690 which has increased the Cr content has been replaced for the SG tube due to its high corrosion resistance against stress corrosion cracking (SCC). However, there is lack of research on the high temperature creep rupture and life prediction model of Alloy 690. In this study, creep test was performed to estimate the high temperature creep rupture life of Alloy 690. Based on reported creep data and creep test results of Alloy 690 in this study, creep life extrapolation was carried out using Larson-Miller Parameter (LMP), Orr-Sherby-Dorn (OSD), Manson-Haferd Parameter (MHP), and Wilshire’s approach. And a hyperbolic sine (sinh) function to determine master curves in LMP, OSD and MHP methods was used for improving the creep life estimation of Alloy 690 material.

scholarly journals Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident

2020 ◽  
Vol 7 (3) ◽  
pp. 19-00560-19-00560
Author(s):  
Yoshihito YAMAGUCHI ◽  
Jinya KATSUYAMA ◽  
Yoshiyuki KAJI ◽  
Masahiko OSAKA ◽  
Yinsheng LI
Keyword(s):  
High Temperature ◽  
Test Data ◽  
Creep Test ◽  
Severe Accident ◽  
High Temperature Creep ◽  
Temperature Creep ◽  
Lower Head ◽  
Failure Evaluation

Creep Life Prediction of High Temperature Tube Materials for Power Plants

2004 ◽  
Vol 261-263 ◽  
pp. 1115-1122 ◽  
Author(s):  
Yu Sik Kong ◽  
Han Ki Yoon ◽  
Yi Hyun Park ◽  
Seon Jin Kim
Keyword(s):  
High Temperature ◽  
Power Plants ◽  
Initial Strain ◽  
Maintenance Cost ◽  
High Temperature Creep ◽  
Creep Life ◽  
Time Prediction ◽  
Temperature Creep ◽  
Long Time ◽  
Strain Method

The high temperature creep behaviors of heat machine systems such as aircraft engines, boilers and turbines in power plants and nuclear reactor components have been considered as an important and needful fact. There are considerable research results available for the design of high temperature tube materials in power plants, based on uni-axial tension creep tests. However, few studies on the Initial Strain Method (ISM) capable of securing repair, maintenance, cost loss and life loss have been made. In this method, a long time prediction of high temperature creep characteristics can be dramatically reduced through a short time experiment. The purpose of present study is to investigate the high temperature creep life of 1Cr-0.5Mo steel using the Initial Strain Method. The creep test was performed at 500°C, 550°C and 600°C under a pure loading. In the prediction of creep life for 1Cr-0.5Mo steel, the equation of ISM was superior to those of LMP. Especially, the long time prediction of creep life was identified to improve the reliability.

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