Streaming of 14-MeV neutrons through an iron duct: comparison of measured neutron and gamma-ray energy spectra with results calculated using the Monte Carlo code MCNP

Technical Report · Mon Nov 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/6653213· OSTI ID:6653213

Santoro, R. T.; Barnes, J. M.; Soran, P. D.; Alsmiller, Jr., R. G.

Neutron and gamma-ray energy spectra resulting from the streaming of 14 MeV neutrons through a 0.30-m-diameter duct (length-to-diameter ratio = 2.83) have been calculated using the Monte Carlo code MCNP. The calculated spectra are compared with measured data and data calculated previously using a combination of discrete ordinates and Monte Carlo methods. Comparisons are made at twelve detector locations on and off the duct axis for neutrons with energies above 850 keV and for gamma rays with energies above 750 keV. The neutron spectra calculated using MCNP agree with the measured data within approx. 5 to approx. 50%, depending on detector location and neutron energy. Agreement with the measured gamma-ray spectra is also within approx. 5 to approx. 50%. The spectra obtained with MCNP are also in favorable agreement with the previously calculated data and were obtained with less calculational effort.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6653213
• Report Number(s): ORNL/TM-8504; ON: DE83003349
• Country of Publication: United States
• Language: English

Related Subjects

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DISCRETE ORDINATE METHOD
DUCTS
ELEMENTS
ENERGY SPECTRA
GAMMA TRANSPORT THEORY
IRON
METALS
MONTE CARLO METHOD
NEUTRAL-PARTICLE TRANSPORT
NEUTRON TRANSPORT
RADIATION STREAMING
RADIATION TRANSPORT
SPECTRA
THERMONUCLEAR REACTORS
TRANSITION ELEMENTS
TRANSPORT THEORY