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Hydrogen absorption by zirconium alloy cladding tube with surface oxide film

Technical Report:

Abstract

Hydrogen absorption kinetics of Zircaloy (2 and 4) and Zr-Nb (1% and 2.5%) cladding tubes were studied by heating in hydrogen gas after oxide film formation in steam, oxygen or air. Hydrogen absorption rate depended on the degree of pre-oxidation. In Zr-Nb, the absorption rate was also sensitive to the atmosphere used for pre-oxidation, whereas in Zircaloy the rate was relatively independent of the kind of oxidant. In all materials, pre-oxidation to the transition point was found to bring about high absorption rate in the subsequent hydriding step. After pre-oxidation to the post-transition region, hydrogen absorption rate by Zircaloy showed constant or slightly decreasing tendency with increasing oxidation level, whereas in Zr-Nb, particularly in Zr-2.5%Nb, the rate showed a clearly decreasing tendency depending on the pre-oxidation atmosphere. Different characteristics of Zircaloy and Zr-Nb can partly be explained in terms of different valencies of alloying elements which influence the lattice defect concentrations in the oxide films. (author).
Authors:
Uchida, Masaaki [1] 
  1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Publication Date:
Aug 01, 1991
Product Type:
Technical Report
Report Number:
JAERI-M-91-132
Reference Number:
SCA: 360104; 360105; PA: JPN-91:011153; SN: 92000630569
Resource Relation:
Other Information: PBD: Aug 1991
Subject:
36 MATERIALS SCIENCE; ZIRCONIUM BASE ALLOYS; HYDROGEN; CHEMISORPTION; ADSORPTION; NIOBIUM ALLOYS; PIPES; SURFACE COATING; OXIDATION; STEAM; OXYGEN; AIR; OXIDES; FILMS; CHEMICAL REACTION KINETICS; CORROSION RESISTANCE; HYDRIDATION; 360104; 360105; PHYSICAL PROPERTIES; CORROSION AND EROSION
OSTI ID:
10109037
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE92750962; TRN: JP9111153
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
JPN
Size:
37 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Uchida, Masaaki. Hydrogen absorption by zirconium alloy cladding tube with surface oxide film. Japan: N. p., 1991. Web.
Uchida, Masaaki. Hydrogen absorption by zirconium alloy cladding tube with surface oxide film. Japan.
Uchida, Masaaki. 1991. "Hydrogen absorption by zirconium alloy cladding tube with surface oxide film." Japan.
@misc{etde_10109037,
title = {Hydrogen absorption by zirconium alloy cladding tube with surface oxide film}
author = {Uchida, Masaaki}
abstractNote = {Hydrogen absorption kinetics of Zircaloy (2 and 4) and Zr-Nb (1% and 2.5%) cladding tubes were studied by heating in hydrogen gas after oxide film formation in steam, oxygen or air. Hydrogen absorption rate depended on the degree of pre-oxidation. In Zr-Nb, the absorption rate was also sensitive to the atmosphere used for pre-oxidation, whereas in Zircaloy the rate was relatively independent of the kind of oxidant. In all materials, pre-oxidation to the transition point was found to bring about high absorption rate in the subsequent hydriding step. After pre-oxidation to the post-transition region, hydrogen absorption rate by Zircaloy showed constant or slightly decreasing tendency with increasing oxidation level, whereas in Zr-Nb, particularly in Zr-2.5%Nb, the rate showed a clearly decreasing tendency depending on the pre-oxidation atmosphere. Different characteristics of Zircaloy and Zr-Nb can partly be explained in terms of different valencies of alloying elements which influence the lattice defect concentrations in the oxide films. (author).}
place = {Japan}
year = {1991}
month = {Aug}
}