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REVISTA DE CHIMIE
Cite as: Rev. Chim.
https://doi.org/10.37358/Rev.Chim.1949

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ISSN Online 2668-8212
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Revista de Chimie (Rev. Chim.), Year 2019, Volume 70, Issue 11, 3926-3930

https://doi.org/10.37358/RC.70.19.11.7674

Manuela Fulger, Dumitra Lucan, Maria Mihalache, Lucian Velciu

Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater

Abstract:

This study has been carried out to identify the operating factors involved in the failure of two tubes made of 304 stainless steel removed from a high pressure feedwater heater working in a nuclear power plant. The samples cut from tubes have been analyzed by different methods: visual examination, optical (metallographic) microscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy. Following analyses, on the surface of tubes was highlighted the presence of many pits in which cracks have started. Inside the pits, impurities of the type S, Cl, K, Ca were detected too. The branched cracks most likely have occurred as a result of precipitation of small amounts of chlorides deposited and concentrated on the surface of the tubes over a long period of operation. The stresses that favored this type of corrosion cracking were both residual stresses and stresses occurring at the torsion and bending of the tubes, while the high water temperature from feed heater was also a favorable factor for corrosion. The final conclusion was that the tubes failed by a chloride induced stress corrosion cracking mechanism.
Keywords:
304 stainless steel; chloride stress corrosion cracking; NPP heater; SEM; EDS

Issue: 2019, Volume 70, Issue 11
Pages: 3926-3930
Publication date: 2019/12/15
https://doi.org/10.37358/RC.70.19.11.7674
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Creative Commons License
This article is published under the Creative Commons Attribution 4.0 International License
Citation Styles
Cite this article as:
FULGER, M., LUCAN, D., MIHALACHE, M., VELCIU, L., Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater, Rev. Chim., 70(11), 2019, 3926-3930.

Vancouver
Fulger M, Lucan D, Mihalache M, Velciu L. Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater. Rev. Chim.[internet]. 2019 Nov;70(11):3926-3930. Available from: https://doi.org/10.37358/RC.70.19.11.7674


APA 6th edition
Fulger, M., Lucan, D., Mihalache, M. & Velciu, L. (2019). Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater. Revista de Chimie, 70(11), 3926-3930. https://doi.org/10.37358/RC.70.19.11.7674


Harvard
Fulger, M., Lucan, D., Mihalache, M., Velciu, L. (2019). 'Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater', Revista de Chimie, 70(11), pp. 3926-3930. https://doi.org/10.37358/RC.70.19.11.7674


IEEE
M. Fulger, D. Lucan, M. Mihalache, L. Velciu, "Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater". Revista de Chimie, vol. 70, no. 11, pp. 3926-3930, 2019. [online]. https://doi.org/10.37358/RC.70.19.11.7674


Text
Manuela Fulger, Dumitra Lucan, Maria Mihalache, Lucian Velciu,
Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater,
Revista de Chimie,
Volume 70, Issue 11,
2019,
Pages 3926-3930,
ISSN 2668-8212,
https://doi.org/10.37358/RC.70.19.11.7674.
(https://revistadechimie.ro/Articles.asp?ID=7674)
Keywords: 304 stainless steel; chloride stress corrosion cracking; NPP heater; SEM; EDS


RIS
TY - JOUR
T1 - Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater
A1 - Fulger, Manuela
A2 - Lucan, Dumitra
A3 - Mihalache, Maria
A4 - Velciu, Lucian
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2019
VL - 70
IS - 11
SP - 3926
EP - 3930
UR - https://doi.org/10.37358/RC.70.19.11.7674
KW - 304 stainless steel
KW - chloride stress corrosion cracking
KW - NPP heater
KW - SEM
KW - EDS
ER -


BibTex
@article{RevCh2019P3926,
author = {Fulger Manuela and Lucan Dumitra and Mihalache Maria and Velciu Lucian},
title = {Factors Involved in Stress Corrosion Cracking of Tubes from a Nuclear Power Plant Feedwater Heater},
journal = {Revista de Chimie},
volume = {70},
number = {11},
pages = {3926-3930},
year = {2019},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.70.19.11.7674},
url = {https://revistadechimie.ro/Articles.asp?ID=7674}
}
 
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