OS0812 Revision of the Embrittlement Correlation Method for Domestic Reactor Pressure Vessel Steels

2012 ◽  
Vol 2012 (0) ◽  
pp. _OS0812-1_-_OS0812-3_
Author(s):  
Naoki SONEDA ◽  
Shohei SAKAGUCHI ◽  
Gou NOZAKI ◽  
Minoru TOMIMATSU
Keyword(s):  
Pressure Vessel ◽  
Correlation Method ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

Characteristics of the New Embrittlement Correlation Method for the Japanese Reactor Pressure Vessel Steels

2009 ◽  
Author(s):  
Naoki Soneda ◽  
Akiyoshi Nomoto
Keyword(s):  
Pressure Vessel ◽  
Correlation Method ◽  
Reactor Pressure Vessel ◽  
Surveillance Data ◽  
New Method ◽  
Rate Equations ◽  
Mathematical Form ◽  
Microstructural Changes ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

Neutron irradiation embrittlement of reactor pressure vessel steels is an important ageing issue for the long term operation of light water reactors. A new embrittlement correlation method was developed by CRIEPI and the Japanese electric utilities in 2007. This method is primarily based on the fundamental understandings on the embrittlement mechanisms: i.e. microstructural changes were modeled by the mathematical form of rate equations, and the predicted microstructural changes were further correlated with the mechanical property changes in transition temperature region. The coefficients of the rate equations were optimized using the Japanese surveillance data of RPV embrittlement. This method was adopted as the revision of the Japanese code, JEAC 4201–2007, in 2007. In this paper, after a brief explanation on the new correlation method, the predictions of the new method will be investigated through comparisons with the previous correlation, JEAC4201–2004, and the US surveillance data in order to identify the characteristics of the new method.

Characteristics of the New Embrittlement Correlation Method for the Japanese Reactor Pressure Vessel Steels

2010 ◽  
Vol 132 (10) ◽  
Author(s):  
Naoki Soneda ◽  
Akiyoshi Nomoto
Keyword(s):  
Pressure Vessel ◽  
Correlation Method ◽  
Reactor Pressure Vessel ◽  
Surveillance Data ◽  
New Method ◽  
Rate Equations ◽  
Mathematical Form ◽  
Microstructural Changes ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

Neutron irradiation embrittlement of reactor pressure vessel steels is an important aging issue for the long-term operation of light water reactors. A new embrittlement correlation method was developed by Central Research Institute of Electric Power Industry and the Japanese electric utilities in 2007. This method is primarily based on the fundamental understandings on the embrittlement mechanisms, i.e., microstructural changes were modeled by the mathematical form of rate equations, and the predicted microstructural changes were further correlated with the mechanical property changes in transition temperature region. The coefficients of the rate equations were optimized using the Japanese surveillance data of RPV embrittlement. This method was adopted as the revision of the Japanese code, JEAC4201-2007, in 2007. In this paper, after a brief explanation on the new correlation method, the predictions of the new method will be investigated through comparisons with the previous correlation, JEAC4201-2004, and the U.S. surveillance data in order to identify the characteristics of the new method.

Thermodynamic models of low-temperature Mn–Ni–Si precipitation in reactor pressure vessel steels

2014 ◽  
Vol 4 (3) ◽  
pp. 101-105 ◽  
Author(s):  
Wei Xiong ◽  
Huibin Ke ◽  
Ramanathan Krishnamurthy ◽  
Peter Wells ◽  
Leland Barnard ◽  
...  
Keyword(s):  
Low Temperature ◽  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Thermodynamic Models ◽  
Pressure Vessel Steels ◽  
Image Position ◽  
Reactor Pressure

Abstract

scholarly journals 3-D Atom Probe Observation of Solute Atom Clusters in Reactor Pressure Vessel Steels

Materia Japan ◽  
2008 ◽  
Vol 47 (12) ◽  
pp. 619-619
Author(s):  
Kenji Nishida ◽  
Kenji Dohi ◽  
Akiyoshi Nomoto ◽  
Naoki Soneda
Keyword(s):  
Pressure Vessel ◽  
Solute Atom ◽  
Atom Probe ◽  
Reactor Pressure Vessel ◽  
Atom Clusters ◽  
Pressure Vessel Steels ◽  
Reactor Pressure

Study of Lüders phenomena in reactor pressure vessel steels

2013 ◽  
Vol 588 ◽  
pp. 151-166 ◽  
Author(s):  
D.W. Beardsmore ◽  
J. Quinta da Fonseca ◽  
J. Romero ◽  
C.A. English ◽  
S.R. Ortner ◽  
...  
Keyword(s):  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Pressure Vessel Steels ◽  
Reactor Pressure
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