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Title: Small-angle neutron scattering measurements of δ-phase deuteride (hydride) precipitates in Zircaloy 4

Abstract

Small-angle neutron scattering (SANS) measurements have been performed under ambient conditions to characterize deuteride (hydride) particles in Zircaloy 4, a fuel cladding material used in pressurized light-water nuclear reactors. Hydrogen pickup by the cladding leads to a rim structure in which large circumferential hydride plate-like particles preferentially form on the cooler water-side region of the cladding. Deuterium substitution has been used to increase the coherent response and decrease the incoherent background of the SANS measurements. Four bulk deuterium concentrations were investigated, approximately 100, 400, 500 and 1000 parts per million by weight (w.p.p.m.) deuterium, as well as a zero-deuterium-concentration reference sample. The net SANS response from the deuteride phase was determined at all concentration values after subtraction of the reference SANS response, which effectively subtracted the strong scattering from second-phase particles in as-received Zircaloy. The net SANS response consisted of strong Porod scattering from deuteride particles over the entire measuredQrange (0.005–0.4 Å -1). The net SANS response was anisotropic at concentrations greater than 100 w.p.p.m. and required elliptical averaging analysis. A significant sample orientation effect on the intensity of the SANS response was observed, due to preferential alignment of deuteride particles. The effect ofex situapplied stress at elevated temperature onmore » deuteride phase dissolution and reprecipitation was investigated; a weak effect was observed with SANS that could not be confirmed by optical microscopy.« less

Authors:
 [1];  [1]; ORCiD logo [2]; ORCiD logo [2]
  1. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Nuclear, Radiological, and Plasma Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Sciences Directorate, Biology and Soft Matter Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1506779
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Crystallography (Online)
Additional Journal Information:
Journal Volume: 51; Journal Issue: 3; Journal ID: ISSN 1600-5767
Publisher:
International Union of Crystallography
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; small-angle neutron scattering; SANS; hydrides; Zircaloy; anisotropic scattering

Citation Formats

Heuser, Brent J., Lin, Jun-Li, Do, Changwoo, and He, Lilin. Small-angle neutron scattering measurements of δ-phase deuteride (hydride) precipitates in Zircaloy 4. United States: N. p., 2018. Web. doi:10.1107/S160057671800479X.
Heuser, Brent J., Lin, Jun-Li, Do, Changwoo, & He, Lilin. Small-angle neutron scattering measurements of δ-phase deuteride (hydride) precipitates in Zircaloy 4. United States. doi:10.1107/S160057671800479X.
Heuser, Brent J., Lin, Jun-Li, Do, Changwoo, and He, Lilin. Wed . "Small-angle neutron scattering measurements of δ-phase deuteride (hydride) precipitates in Zircaloy 4". United States. doi:10.1107/S160057671800479X. https://www.osti.gov/servlets/purl/1506779.
@article{osti_1506779,
title = {Small-angle neutron scattering measurements of δ-phase deuteride (hydride) precipitates in Zircaloy 4},
author = {Heuser, Brent J. and Lin, Jun-Li and Do, Changwoo and He, Lilin},
abstractNote = {Small-angle neutron scattering (SANS) measurements have been performed under ambient conditions to characterize deuteride (hydride) particles in Zircaloy 4, a fuel cladding material used in pressurized light-water nuclear reactors. Hydrogen pickup by the cladding leads to a rim structure in which large circumferential hydride plate-like particles preferentially form on the cooler water-side region of the cladding. Deuterium substitution has been used to increase the coherent response and decrease the incoherent background of the SANS measurements. Four bulk deuterium concentrations were investigated, approximately 100, 400, 500 and 1000 parts per million by weight (w.p.p.m.) deuterium, as well as a zero-deuterium-concentration reference sample. The net SANS response from the deuteride phase was determined at all concentration values after subtraction of the reference SANS response, which effectively subtracted the strong scattering from second-phase particles in as-received Zircaloy. The net SANS response consisted of strong Porod scattering from deuteride particles over the entire measuredQrange (0.005–0.4 Å-1). The net SANS response was anisotropic at concentrations greater than 100 w.p.p.m. and required elliptical averaging analysis. A significant sample orientation effect on the intensity of the SANS response was observed, due to preferential alignment of deuteride particles. The effect ofex situapplied stress at elevated temperature on deuteride phase dissolution and reprecipitation was investigated; a weak effect was observed with SANS that could not be confirmed by optical microscopy.},
doi = {10.1107/S160057671800479X},
journal = {Journal of Applied Crystallography (Online)},
issn = {1600-5767},
number = 3,
volume = 51,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
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