Measurements of neutron and gamma-ray streaming in a cavity-duct system and an analysis by an albedo Monte Carlo method
Spectral and spatial distributions of neutrons and gamma rays were measured in a simple cavity-duct configuration to observe profiles of cavity streaming. The change of the profiles of neutrons and gamma rays is examined by blocking source neutrons with a 32-cm-thick aluminum plug. The following observations resulted from the experiments: Fast neutrons of several million electron volts energy streamed through ducts. The neutron and gamma-ray spectra were similar except in the source neutron beam. The gamma rays were predominantly those arising from neutron capture in iron. The aluminum plug greatly decreased the fast neutron flux but had only a limited effect on the low energy neutron flux. The applicability of the albedo Monte Carlo calculational method to this problem was examined with the following conclusions: For ducts of small radius, the calculations overestimate the streaming because the albedo data were given for plane geometry. Low energy neutrons were underestimated by the calculation due to the neutron penetration through the cavity wall.
- Research Organization:
- Kyoto University, Department of Nuclear Engineering Yoshida-Honmachi, Sakyo-ku, Kyoto 606
- OSTI ID:
- 6775668
- Journal Information:
- Nucl. Sci. Eng.; (United States), Vol. 81:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CAVITIES
RADIATION STREAMING
DUCTS
FAST NEUTRONS
GAMMA RADIATION
ACCURACY
ALBEDO
ALUMINIUM
CAPTURE
ENERGY ABSORPTION
EXPERIMENTAL DATA
GAMMA SPECTRA
IRON
MEASURING METHODS
MONTE CARLO METHOD
NEUTRON FLUX
NEUTRON SOURCES
NEUTRON SPECTRA
REACTOR CHANNELS
SENSITIVITY
SPATIAL DISTRIBUTION
ABSORPTION
BARYONS
DATA
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
INFORMATION
IONIZING RADIATIONS
METALS
NEUTRONS
NUCLEONS
NUMERICAL DATA
PARTICLE SOURCES
RADIATION FLUX
RADIATION SOURCES
RADIATIONS
REACTOR COMPONENTS
SPECTRA
TRANSITION ELEMENTS
654003* - Radiation & Shielding Physics- Neutron Interactions with Matter