Results 131 to 140 of about 1,888 (180)
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Automatic reactor regulator and xenon oscillations
Soviet Atomic Energy, 1977A M Afanas'Ev, B Z Torlin
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An axial xenon oscillation model
Annals of Nuclear Energy, 1978Abstract A two-point xenon oscillation model was developed for PWRs. The model employs the nonlinear xenon and iodine balance equations and the one group, one-dimensional neutron diffusion equation having nonlinear power reactivity feedback. A two-term spatial harmonic series solution was assumed for the flux, xenon and iodine distributions.
R.J. Onega, R.A. Kisner
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On the Control of Spatial Xenon Oscillations
Nuclear Science and Engineering, 1973The control of spatial xenon-induced oscillations in large power reactors is considered from the point of view of practical operator manual control.
A. M. Christie, C. G. Poncelet
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A semi-analytical treatment of xenon oscillations
Annals of Nuclear Energy, 2017Abstract A novel approach is developed to investigate xenon oscillations within a two-group two-region coupled core reactor model incorporating thermal feedback and poison effects. Group-wise neutronic coupling coefficients between the core regions are calculated applying the associated fundamental and first mode eigenvalue separation values.
Abdolhamid Minuchehr, M Zarei
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Experience with Xenon Oscillations
Nuclear Applications and Technology, 1970AbstractXenon spatial flux oscillations can be an operational problem in large reactors operating at high power levels.
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Oscillator strenght of the resonance lines of xenon
Physica, 1973Abstract We have determined the oscillator strength of the lowest resonance lines of xenon from the imprisonment time of the corresponding radiation. The results are: 3 P 1 − 1 S 0 (147.0 nm): 3 ƒ = 0.214 (±0.020) , 1 P 1 − 1 S 1 (129.6 nm): 1 ƒ = 0.180 (±0.040) .
W. Wieme, P. Mortier
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Annals of Nuclear Energy, 2013
Existing Monte Carlo burnup codes suffer from instabilities caused by spatial xenon oscillations. These oscillations can be prevented by forcing equilibrium between the neutron flux and saturated xenon distribution. The equilibrium calculation can be integrated to Monte Carlo neutronics, which provides a simple and lightweight solution that can be used
Jan Dufek
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Existing Monte Carlo burnup codes suffer from instabilities caused by spatial xenon oscillations. These oscillations can be prevented by forcing equilibrium between the neutron flux and saturated xenon distribution. The equilibrium calculation can be integrated to Monte Carlo neutronics, which provides a simple and lightweight solution that can be used
Jan Dufek
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Xenon: Oscillator strengths and photoionization
Zeitschrift f�r Physik A Atoms and Nuclei, 1976Electron energy loss spectra of Xe have been analyzed by means of Fano and Lu's collision theory of spectra. A new and improved set of empirical parameters has been determined,eigenquantum defects, orthogonal transformation matrix, anddipole matrix elements.
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Xenon Oscillations in a VVÉR-1000 Core
Atomic Energy, 2002Xenon oscillations – periodic redistribution of the power over the core volume – can occur in a VVER-1000 core because of the large size of this core. The xenon oscillations can be conventionally divided into axial, radial, diametral, and azimuthal.
V. A. Tereshonok +4 more
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1989
Space-independent xenon oscillations are linearly unstable at high neutron flux, even with a negative power coefficient of reactivity, if the magnitude of the power coefficient is too small. These linearly unstable oscillations typically develop into stable limit cycles when nonlinear neutronics and xenon burnout are included.
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Space-independent xenon oscillations are linearly unstable at high neutron flux, even with a negative power coefficient of reactivity, if the magnitude of the power coefficient is too small. These linearly unstable oscillations typically develop into stable limit cycles when nonlinear neutronics and xenon burnout are included.
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