Time-of-flight pulsed neutron diffraction of liquids using an electron linac

1977 ◽  
Vol 147 (3) ◽  
pp. 519-528 ◽  
Author(s):  
Kenji Suzuki ◽  
Masakatsu Misawa ◽  
Kenzo Kai ◽  
Noboru Watanabe
Keyword(s):  
Neutron Diffraction ◽  
Time Of Flight ◽  
Electron Linac ◽  
Pulsed Neutron

T The Structure of NO3– in Molten Monovalent Metal Nitrates by Pulsed Neutron Diffraction

1977 ◽  
Vol 32 (12) ◽  
pp. 1438-1443 ◽  
Author(s):  
Kenji Suzuki ◽  
Yoshiaki Fukushima
Keyword(s):  
Neutron Diffraction ◽  
Structure Factor ◽  
Time Of Flight ◽  
Isosceles Triangle ◽  
Monovalent Metal ◽  
Epithermal Neutrons ◽  
Metal Nitrates ◽  
Regular Triangle ◽  
Wide Range ◽  
Pulsed Neutron

Abstract The structure factor of molten monovalent metal nitrates was measured over a wide range of scattering vectors by time-of-flight pulsed neutron diffraction using epithermal neutrons generated from an electron LINAC. It is found that the NO3- ion forms an isosceles triangle in molten LiNO3, AgNO3 and TlNO3, and a regular triangle in molten NaNO3, KNO3, RbNO3 and CsNO3.

scholarly journals Through-Thickness Microstructure Characterization in a Centrifugally Cast Austenitic Stainless Steel Nuclear Reactor Primary Loop Pipe Using Time-of-Flight Neutron Diffraction

2021 ◽  
Vol 5 (2) ◽  
pp. 12
Author(s):  
Matthew M. Schmitt ◽  
Daniel J. Savage ◽  
James J. Wall ◽  
John D. Yeager ◽  
Chanho Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Neutron Diffraction ◽  
Time Of Flight ◽  
Radial Distance ◽  
Ultrasonic Waves ◽  
Science Center ◽  
Los Alamos ◽  
Inspection Method ◽  
Centrifugally Cast

The US code of Federal Regulations mandates regular inspection of centrifugally cast austenitic stainless steel pipe, commonly used in primary cooling loops in light-water nuclear power plants. These pipes typically have a wall thickness of ~8 cm. Unfortunately, inspection using conventional ultrasonic techniques is not reliable as the microstructure strongly attenuates ultrasonic waves. Work is ongoing to simulate the behavior of acoustic waves in this microstructure and ultimately develop an acoustic inspection method for reactor inspections. In order to account for elastic anisotropy in the material, the texture in the steel was measured as a function of radial distance though the pipe wall. Experiments were conducted on two 10 × 12.7 × 80 mm radial sections of a cast pipe using neutron diffraction scans of 2 mm slices using the HIPPO time-of-flight neutron diffractometer at the Los Alamos Neutron Science Center (LANSCE, Los Alamos, NM, USA). Strong textures dominated by a small number of austenite grains with their (100) direction aligned in the radial direction of the pipe were observed. ODF analysis indicated that up to 70% of the probed volume was occupied by just three single-grain orientations, consistent with grain sizes of almost 1 cm. Texture and phase fraction of both ferrite and austenite phases were measured along the length of the samples. These results will inform the development of a more robust diagnostic tool for regular inspection of this material.

Time-of-flight neutron diffraction of nanocrystalline powders of nonstoichiometric niobium carbide NbC0.77

2017 ◽  
Vol 59 (3) ◽  
pp. 607-612 ◽  
Author(s):  
A. S. Kurlov ◽  
A. I. Gusev ◽  
V. S. Kuznetsov ◽  
I. A. Bobrikov ◽  
A. M. Balagurov ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Niobium Carbide ◽  
Time Of Flight ◽  
Nanocrystalline Powders

Dynamical diffraction peak splitting in time-of-flight neutron diffraction

2006 ◽  
Vol 89 (23) ◽  
pp. 233515
Author(s):  
E. Üstündag ◽  
R. A. Karnesky ◽  
M. R. Daymond ◽  
I. C. Noyan
Keyword(s):  
Neutron Diffraction ◽  
Time Of Flight ◽  
Diffraction Peak ◽  
Dynamical Diffraction ◽  
Peak Splitting
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