Neutron streaming through a slit and duct in concrete shields and comparison with a Monte Carlo analysis
A series of measurements of about14-MeV deuterium-tritium neutrons streaming through a slit and a duct in concrete shields has been carried out using a Cockcroft-Walton-type neutron generator. Measured neutron energy spectra are compared with calculations in six configurations of the shields. The configurations are the simplified geometries of streaming paths of tokamak reactors, such as a divertor throat and a neutral beam injection port. The measured data were obtained with an NE-213 liquid scintillator using pulse shape discrimination methods to resolve neutron and gamma-ray pulse height data and using a spectral unfolding code to convert these data to energy spectra. The experiments were analyzed by a Monte Carlo code. The calculated neutron energy spectra slightly underestimate the measured data, especially in the range of 6 to 8 MeV. The agreement between the calculated and measured integral flux above 2.2 MeV ranges from 87.5 to 72.% depending on the configurations.
- Research Organization:
- Hitachi Ltd., Energy Research Laboratory, 1168 Moriyama-cho, Hitachi, Ibaraki 316
- OSTI ID:
- 5300590
- Journal Information:
- Nucl. Sci. Eng.; (United States), Vol. 84:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
TOKAMAK TYPE REACTORS
RADIATION STREAMING
SHIELDS
CALCULATION METHODS
COMPUTER CODES
CONCRETES
CONFIGURATION
DEUTERIUM
ENERGY LEVELS
EVALUATED DATA
LIQUID SCINTILLATION DETECTORS
MONTE CARLO METHOD
NEUTRON SOURCES
NEUTRON SPECTRA
NEUTRON TRANSPORT THEORY
NEUTRONS
PULSE DISCRIMINATORS
REACTOR COMPONENTS
SPECTRA UNFOLDING
TRITIUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BUILDING MATERIALS
DATA
DATA PROCESSING
DISCRIMINATORS
ELECTRONIC CIRCUITS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MATERIALS
MEASURING INSTRUMENTS
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTICLE SOURCES
PROCESSING
PULSE CIRCUITS
RADIATION DETECTORS
RADIATION SOURCES
RADIOISOTOPES
SCINTILLATION COUNTERS
SPECTRA
STABLE ISOTOPES
THERMONUCLEAR REACTORS
TRANSPORT THEORY
YEARS LIVING RADIOISOTOPES
700201* - Fusion Power Plant Technology- Blanket Engineering