Effect of lithium hydroxide on stability of fuel cladding oxide film in simulated pressurized water reactor primary water environments

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

The trend in pressurized water reactors (PWR) toward higher burnups, increasing lithium concentrations, and higher coolant temperatures imposes a demand for better fuel cladding corrosion and hydriding properties. There is a lack of reliable and fast in-situ techniques to investigate zirconium alloys in high-temperature water environments. The contact electric resistance (CER) technique was used to measure the electric resistance of the oxide growing on a zirconium-based fuel cladding material. Lithium hydroxide (LiOH) decreased electric resistance of the oxide when LiOH was in excess of ∼ 70 ppm in PWR water at 300°C. Electric resistance of the oxide was dependent upon LiOH concentration and was shown to correlate inversely with the effect of LiOH on weight gain. Kinetics of the decrease of electric resistance indicated the mechanism of degradation was a phase transformation rather than a diffusion-limited process.
Original languageEnglish
Pages (from-to)724 - 729
Number of pages6
JournalCorrosion
Volume53
Issue number9
DOIs
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

Fingerprint

Pressurized water reactors
Oxides
Oxide films
Lithium
Water
Electric contacts
Zirconium alloys
Electric resistance
Zirconium
Coolants
Phase transitions
Corrosion
Degradation
Temperature
Kinetics
lithium hydroxide

Cite this

@article{23d203f26d8d49dfaa86805d1c9652e3,
title = "Effect of lithium hydroxide on stability of fuel cladding oxide film in simulated pressurized water reactor primary water environments",
abstract = "The trend in pressurized water reactors (PWR) toward higher burnups, increasing lithium concentrations, and higher coolant temperatures imposes a demand for better fuel cladding corrosion and hydriding properties. There is a lack of reliable and fast in-situ techniques to investigate zirconium alloys in high-temperature water environments. The contact electric resistance (CER) technique was used to measure the electric resistance of the oxide growing on a zirconium-based fuel cladding material. Lithium hydroxide (LiOH) decreased electric resistance of the oxide when LiOH was in excess of ∼ 70 ppm in PWR water at 300°C. Electric resistance of the oxide was dependent upon LiOH concentration and was shown to correlate inversely with the effect of LiOH on weight gain. Kinetics of the decrease of electric resistance indicated the mechanism of degradation was a phase transformation rather than a diffusion-limited process.",
author = "Timo Saario and Seppo T{\"a}htinen and Jussi Piippo",
year = "1997",
doi = "10.5006/1.3290306",
language = "English",
volume = "53",
pages = "724 -- 729",
journal = "Corrosion",
issn = "0010-9312",
number = "9",

}

Effect of lithium hydroxide on stability of fuel cladding oxide film in simulated pressurized water reactor primary water environments. / Saario, Timo; Tähtinen, Seppo; Piippo, Jussi.

In: Corrosion, Vol. 53, No. 9, 1997, p. 724 - 729.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of lithium hydroxide on stability of fuel cladding oxide film in simulated pressurized water reactor primary water environments

AU - Saario, Timo

AU - Tähtinen, Seppo

AU - Piippo, Jussi

PY - 1997

Y1 - 1997

N2 - The trend in pressurized water reactors (PWR) toward higher burnups, increasing lithium concentrations, and higher coolant temperatures imposes a demand for better fuel cladding corrosion and hydriding properties. There is a lack of reliable and fast in-situ techniques to investigate zirconium alloys in high-temperature water environments. The contact electric resistance (CER) technique was used to measure the electric resistance of the oxide growing on a zirconium-based fuel cladding material. Lithium hydroxide (LiOH) decreased electric resistance of the oxide when LiOH was in excess of ∼ 70 ppm in PWR water at 300°C. Electric resistance of the oxide was dependent upon LiOH concentration and was shown to correlate inversely with the effect of LiOH on weight gain. Kinetics of the decrease of electric resistance indicated the mechanism of degradation was a phase transformation rather than a diffusion-limited process.

AB - The trend in pressurized water reactors (PWR) toward higher burnups, increasing lithium concentrations, and higher coolant temperatures imposes a demand for better fuel cladding corrosion and hydriding properties. There is a lack of reliable and fast in-situ techniques to investigate zirconium alloys in high-temperature water environments. The contact electric resistance (CER) technique was used to measure the electric resistance of the oxide growing on a zirconium-based fuel cladding material. Lithium hydroxide (LiOH) decreased electric resistance of the oxide when LiOH was in excess of ∼ 70 ppm in PWR water at 300°C. Electric resistance of the oxide was dependent upon LiOH concentration and was shown to correlate inversely with the effect of LiOH on weight gain. Kinetics of the decrease of electric resistance indicated the mechanism of degradation was a phase transformation rather than a diffusion-limited process.

U2 - 10.5006/1.3290306

DO - 10.5006/1.3290306

M3 - Article

VL - 53

SP - 724

EP - 729

JO - Corrosion

JF - Corrosion

SN - 0010-9312

IS - 9

ER -