Oxidation and Deuterium Uptake of Zr-2.5Nb Pressure Tubes in CANDU-PHW Reactors

2008 ◽  
pp. 20-20-15 ◽  
Author(s):  
VF Urbanic ◽  
BD Warr ◽  
A Manolescu ◽  
CK Chow ◽  
MW Shanahan
Keyword(s):  
Deuterium Uptake ◽  
Pressure Tubes

High Temperature Aqueous Corrosion and Deuterium Uptake of Coupons Prepared from the Front and Back Ends of Zr-2.5Nb Pressure Tubes

2010 ◽  
Vol 7 (7) ◽  
pp. 102979 ◽  
Author(s):  
H. M. Nordin ◽  
A. J. Elliot ◽  
S. G. Bergin ◽  
P. Barberis ◽  
S. W. Dean
Keyword(s):  
High Temperature ◽  
Aqueous Corrosion ◽  
Deuterium Uptake ◽  
Pressure Tubes

Deuterium Uptake in Iron Oxide (Fe[sub 2]O[sub 3]) Under D[sub 2]+]-Plasma Exposure

2011 ◽  
Author(s):  
T. Sogawa ◽  
N. Matsunami ◽  
N. Ohno ◽  
M. Tokitani ◽  
S. Masuzaki ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Plasma Exposure ◽  
Deuterium Uptake

A Statistical-Based Fatigue Crack Initiation Model for Axial Flaws in Zr-Nb Pressure Tubes

2014 ◽  
Author(s):  
Cheng Liu ◽  
Douglas Scarth ◽  
Alain Douchant
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Rise Time ◽  
Structural Integrity ◽  
Fatigue Crack Initiation ◽  
Mechanical Damage ◽  
Fuel Bundle ◽  
Test Parameters ◽  
Pressure Tubes ◽  
Criteria For Evaluation

Flaws found during in-service inspection of CANDU Zr-2.5Nb pressure tubes include fuel bundle scratches, debris fretting flaws, fuel bundle bearing pad fretting flaws, mechanical damage flaws and crevice corrosion marks. The CSA Standard N285.8 contains procedures and acceptance criteria for evaluation of the structural integrity of CANDU Zr-2.5Nb pressure tubes containing flaws. One of the requirements is to evaluate the flaws for fatigue crack initiation. There was a need to develop a statistical-based model of fatigue crack initiation at flaws for use in deterministic and probabilistic assessments of Zr-2.5Nb pressure tubes. A number of fatigue crack initiation experiments have been performed on notched specimens from irradiated and unirradiated Zr-2.5Nb pressure tube material with a range of hydrogen equivalent concentrations. These experiments were performed in an air environment and included temperature and load rise time as test parameters. The test data has been used to develop a statistical-based model of fatigue crack initiation at flaws that covers the effects of flaw root radius, load rise time and irradiation. This paper describes the development of the statistical-based model.

Development and Characterization of Microstructure and Mechanical Properties of Heat-Treated Zr–2.5Nb Alloy for AHWR Pressure Tubes

2013 ◽  
Vol 2 (1) ◽  
pp. 20120033
Author(s):  
R. N. Singh ◽  
A. K. Bind ◽  
J. B. Singh ◽  
J. K. Chakravartty ◽  
V. Thomas Paul ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Pressure Tubes
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