Preliminary Calculation for Experiments Using Osaka University HITS, (I):Time-Dependent Thermal Neutron Angular Flux from a Pulsed Exponential Assembly Calculated in P<SUB>3</SUB>-Approximation of the Transport Equation
スポンサーリンク
概要
- 論文の詳細を見る
In order to discuss the ambiguity inherent in the diffusion approximation applied to a small-sized medium including a pulsed neutron source, the time variation and the spatial distribution of thermal neutron angular flux are calculated in P<SUB>3</SUB>-approximation of the time-dependent Boltzmann transport equation. With the discussion on the existence of a set of real and complex eigenvalues, the real eigenvalues for the lowest and some higher modes are computed numerically and the corresponding eigenfunctions are derived under Marshak's boundary condition. The results are compared with those obtained in the diffusion approximation and the physical interpretations of resultant asymptotic and non-asymptotic thermal neutron flux are given.
- 一般社団法人 日本原子力学会の論文
著者
-
Suita Tokuo
Department Of Atomic Energy Engineering Faculty Of Engineering Osaka University
-
Sekiya Tamotsu
Department Of Nuclear Engineering Osaka University
-
HISHIDA Hisashi
Department of Nuclear Engineering, Osaka University
関連論文
- Defects in Cadmium Selenide Single Crystals
- NMR Study of γ Ray Induced Polymerisation of Ethyl Acrylate
- Coherent Interactions of a Modulated Electron Beam with a Plasma (HXR-4)
- E.S.R. of Irradiated DPPH Protected by Polystyrene
- Threshold Energy of Atomic Displacement in CdTe
- Thermal Bleaching of F-Centers of Gamma-Irradiated KCl at Low Temperatures
- A High Current and Good Emittance Ion Source
- Flowing Mercury Afterglow Excited by D. C. Discharge
- Depopulation of Excited Mercury Atoms by Collisions with Hydrogen Molecules in the Flowing Mercury Afterglow
- Coherent Domains in Some Parameter Spaces Inherent in a Beam-Plasma Regime
- Non-Linear Phenomena in Beam-Plasma Interaction
- An Observation on a Non-Linear Effect in Beam-plasma Interaction
- Radiation Hardening of Potassium Bromide Crystals at 196°K
- Energy Loss of Low Energy Protons and Deuterons in Evaporated Metallic Films
- Scattering of Low Energy Hydrogen Ions H_, H_ and H_) and Atoms (H_) from Evaporated Metallic Films
- Stopping Cross-Sections of Metallic Films for Projectile of Low Energy Proton
- Secondary Electron Emission Type Neutral Particle Detector
- Stabilization of Flute Instability by High Frequency Field
- Stabilization of Flute Instability by Means of High Frequency Field
- Microinstability of Mirror Confined Energetic Plasma in an R.F. Electric Field
- Thermoluminescence of Gamma-Irradiated KCl
- A Study of a Manganese Paramagnetic Center in Irradiated NaCl:Mn^ Crystals
- Distribution Coefficients of Various Impurities in Alkali Halides
- Excitation of Ion Cyclotron Harmonic Waves in a Plasma by a Perpendicularly Injected Electron Beam
- Excitation and Stabilization of Microinstabilities by R.F. Electric Field
- Effects of an R.F. Electric Field on Microinstability
- Intensity Relaxation of Certain Hg Lines in Preionized Mercury Vapor Flow
- Space Charge Phenomena in Nitrobenzene under High Electric Field
- Electrostatic Transformer Type Particle Accelerator using Ceramic BaTiO_3 : Ferrostac
- An Approach to the Unified Theory of Nuclear Reactions
- Excitation of Longitudinal Waves near Ion Cyclotron Harmonics
- Photoconduction and Darkening of AgCl Crystals at Low Temperatures
- Optical Bleaching of Gamma-Irradiated KCl at Room Temperature
- Dielectric Breakdown and Pulse Conduction of Silver Halide Crystals
- Suppression of Precessional Drift Wave by External Inhomogeneous High Frequency Field
- Injection-Trapping of High Energy Molecular Ions into the Mirror Field with the RF Electric Field (II)
- Decrease in Intensity of Hg Lines near the Source in Weakly Ionized Mercury Gas Flow
- Annealing of Quenched-in Defects in Ge Crystal : Dislocation density 10^4-10^5 etch-pits/cm^2
- Effects of Dislocation Density on the Precipitation Rate of Cu in Ge
- Temperature Dependence of Flow Stress in Gamma Ray Irradiated Sodium Chloride Crystals
- Response Time of Ion Beams in a PIG Ion Source
- Beam Controllable PIG Ion Source
- Photoconduction of Silver Chloride Crystals
- Neutron Irradiation Effects on Superconducting Nb-Ti Wires for Fusion Reactor
- Existence of Static Pinning of Dislocations in Gamma-Rayed NaCl
- Effect of Re-crystallization on the Temperature Dependence of Photocurrent of Silver Chloride Crystals
- Bleaching of F-Centers and Formation of Complex Centers in Gamma-Irradiated KCl at Room Temperature
- Radiation Damage in Naphthalene Single Crystals
- Influence of Precipitates to Superconducting Properties of Nb-Ti Alloy in Connection with Hardness
- The Second Spatial Moment of Neutron Distribution in Hydrogenous Moderators Containing Voids
- Utilizing RF Electric Field for Injection-Trapping High Energy Molecular Ions in Mirror Field, (I)
- An Approximate Scattering Kernel for Neutron Slowing Down
- Effective Parameter Method in Space-Dependent Neutron Slowing Down Problem
- Effective Parameter Method in Time-Dependent Neutron Slowing Down Problem
- Determination of effective diffusion parameters in thermal reactor assemblies.
- Hidden state-variables and a non-Markoffian formulation of reactor noise.
- Irreversible circulation of fluctuation in reactor noise.
- Intense and small emittance hydrogen ion beam formation by BPD ion source.
- Direct Measurement of Neutron Flux
- Reactor Noise Theory based on System Size Expansion
- Comparison of Disadvantage Factor among Square, Hexagonal and Cylindrical Cells
- A Stochastic Operator Method of Calculating the Time Interval Distributions in Neutron Detection
- Experimental Studies on Characteristics of Pressure Attenuation and Recovery to Saturation for Decompressive Disturbances in Low Pressurized Water
- Influence of Void and Velocity Variations on Two-Phase Liquid Metal MHD Induction Converter Characteristics
- Influence of Void and Flow Regime on Liquid Metal MHD Induction Generator Using Two-Phase Flow
- Incipient boiling of sodium in an annular channel heated by a single-pin with blockage.
- Effect of Plastic Deformation on the Dielectric Breakdown of Silver Chloride Crystals
- The Effect of Cylindrical Holes in a Moderator on the Passage of Virgin Neutrons from a Point Source
- Preliminary Calculation for Experiments Using Osaka University HITS, (I):Time-Dependent Thermal Neutron Angular Flux from a Pulsed Exponential Assembly Calculated in P3-Approximation of the Transport Equation
- Intensity and Propagation Velocity of Compression Shock Pulses in Low Pressure Steam-Water Medium
- Effect of Fast Neutron Irradiation on Critical Current Density of Nb-Ti Alloy for Fusion Reactor
- Analysis of Two-Phase Liquid Metal MHD Induction Converter