scholarly journals RADIAL FAST NEUTRON LEAKAGE FROM EXPERIMENTAL GAS COOLED REACTOR

1960 ◽  
Author(s):  
P M Woods
Keyword(s):  
Fast Neutron ◽  
Neutron Leakage

A Study of Transverse Buckling Effect on the Characteristics of Nuclides Burnup Wave in a Fast Neutron Multiplying Media

2019 ◽  
Vol 5 (4) ◽  
Author(s):  
Manish Kumar ◽  
Om Pal Singh
Keyword(s):  
Fast Neutron ◽  
Fuel Cycle ◽  
Fuel Burnup ◽  
Full Width ◽  
Half Maximum ◽  
Transient Time ◽  
Velocity Of Propagation ◽  
Neutron Leakage ◽  
Uranium Plutonium ◽  
Plutonium Fuel

A study of transverse buckling effect on the characteristics of nuclides burnup wave in multiplying media (cylindrical geometry) has been carried out. The burnup wave is characterized in terms of velocity of propagation, transient length (TL), and transient time (TT) in establishing the burnup wave and full width at half maximum (FWHM) in the established region of the wave. The uranium–plutonium fuel cycle is considered. The sensitivity of the results is studied for different radial buckling led leakage of neutrons. It is discovered that the velocity of the wave increases with the increase in the radius of the cylinder (i.e., reduction in the transverse buckling and hence increase in radial neutron leakage). FWHM is relatively insensitive to radial neutron leakage. The transient time and transient length are very large for smaller radius; these decrease with the increase in radius. The study provides insight on the build-up of burnup wave in the neutron multiplying media and brings out the importance of transverse buckling led radial neutron leakage on the characteristics of fuel burnup wave in multiplying media.

Lunar fast neutron leakage flux calculation and its elemental abundance dependence

2000 ◽  
Vol 105 (E2) ◽  
pp. 4263-4271 ◽  
Author(s):  
O. Gasnault ◽  
C. d'Uston ◽  
W. C. Feldman ◽  
S. Maurice
Keyword(s):  
Fast Neutron ◽  
Elemental Abundance ◽  
Flux Calculation ◽  
Leakage Flux ◽  
Neutron Leakage

Fast neutron leakage in 18 MeV medical electron accelerator

1999 ◽  
Vol 31 (1-6) ◽  
pp. 475-478 ◽  
Author(s):  
L. Paredes ◽  
R. Genis ◽  
M. Balcázar ◽  
L. Tavera ◽  
E. Camacho
Keyword(s):  
Fast Neutron ◽  
Electron Accelerator ◽  
Neutron Leakage

Voids in Irradiated Tungsten and Molybdenum

1969 ◽  
Vol 27 ◽  
pp. 190-191
Author(s):  
Robert C. Rau ◽  
Robert L. Ladd
Keyword(s):  
Melting Point ◽  
Fast Neutron ◽  
Neutron Irradiation ◽  
Elevated Temperatures ◽  
Irradiation Temperature ◽  
The Body ◽  
Face Centered Cubic ◽  
Body Centered Cubic ◽  
Cubic Metals ◽  
Face Centered

Recent studies have shown the presence of voids in several face-centered cubic metals after neutron irradiation at elevated temperatures. These voids were found when the irradiation temperature was above 0.3 Tm where Tm is the absolute melting point, and were ascribed to the agglomeration of lattice vacancies resulting from fast neutron generated displacement cascades. The present paper reports the existence of similar voids in the body-centered cubic metals tungsten and molybdenum.

Weak Beam Imaging and Diffraction Studies of Stacking Faults in Silicon

1976 ◽  
Vol 34 ◽  
pp. 590-591
Author(s):  
T. Y. Tan ◽  
W. K. Tice
Keyword(s):  
Fast Neutron ◽  
Rapid Determination ◽  
Stacking Faults ◽  
Imaging Method ◽  
Large Reduction ◽  
Dislocation Loops ◽  
Fringe Spacing ◽  
Weak Beam ◽  
Kinematical Theory

In studying ion implanted semiconductors and fast neutron irradiated metals, the need for characterizing small dislocation loops having diameters of a few hundred angstrom units usually arises. The weak beam imaging method is a powerful technique for analyzing these loops. Because of the large reduction in stacking fault (SF) fringe spacing at large sg, this method allows for a rapid determination of whether the loop is faulted, and, hence, whether it is a perfect or a Frank partial loop. This method was first used by Bicknell to image small faulted loops in boron implanted silicon. He explained the fringe spacing by kinematical theory, i.e., ≃l/(Sg) in the fault fringe in depth oscillation. The fault image contrast formation mechanism is, however, really more complicated.

Bursts of fast neutron flows on the earth's surface as the completion of the process of energetic proton scattering from the captured radiation zones

2003 ◽  
Vol 8 (5-6) ◽  
pp. 106-110 ◽  
Author(s):  
I.I. Zalyubovsky ◽  
◽  
V.M. Kartashev ◽  
V.E. Kovtun ◽  
O.K. Minko ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Proton Scattering ◽  
Energetic Proton

Fast Neutron Therapy

1972 ◽  
Vol 12 ◽  
pp. 11-32 ◽  
Author(s):  
W. Duncan
Keyword(s):  
Fast Neutron ◽  
Neutron Therapy ◽  
Fast Neutron Therapy
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