Measurement of the Strain Distribution in Notch Tip Hydrides With High Energy X-Ray Diffraction and the Impact on Overload Modeling

Matthew Kerr,Richard A Holt,Stephanie Tracy,Jonathon D Almer,Mark R Daymond

doi:10.1115/pvp2010-25161

Measurement of the Strain Distribution in Notch Tip Hydrides With High Energy X-Ray Diffraction and the Impact on Overload Modeling

Matthew Kerr, Richard A Holt + Show 3 more

https://doi.org/10.1115/pvp2010-25161

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Publication Date: Jan 1, 2010

Affiliation: United States Nuclear Regulatory Commission, Queen's University, Kinectrics (Canada), Argonne National Laboratory

#High Energy X-ray Diffraction Measurements #Nb Pressure Tubes + Show 8 more

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Abstract

The formation of notch-tip hydrides in CANDU® Zr-2.5Nb pressure tubes can significantly reduce their resistance to fracture, particularly during overload conditions. This paper outlines recent high energy X-ray diffraction measurements of notch tip strain fields in Zr-2.5Nb specimens, during both hydride growth and overload. The use of this data to validate continuum Finite Element (FE) and possible inclusion in ‘Process Zone’ models of hydride fracture are also discussed.

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