Monte Carlo and discrete ordinates calculations of 14-MeV neutrons streaming through a stainless steel duct: Comparison with experiment I

Journal Article · Tue Apr 01 04:00:00 EST 1986 · Nucl. Sci. Eng.; (United States)

DOI:https://doi.org/10.1016/0168-9002(86)91109-5· OSTI ID:5794857

Santoro, R T; Barnes, J M; Alsmiller, R G; Drischler, J D

Measured and calculated neutron and gamma-ray energy spectra from approx. =14-MeV neutrons streaming through a stainless steel duct having a length-to-diameter ratio of 4.6 are compared. The 1.45-m-long duct is imbedded in a concrete block. The spectra were measured with an NE-213 liquid scintillator as a function of detector location relative to the mouth of the duct. The calculated data were obtained using the Monte Carlo code MCNP and the discrete ordinates code DOT 4.3. The calculations were performed using a two-dimensional cylindrical model of the experiment with symmetry about the duct axis. The measured and calculated neutron and gamma-ray spectra are compared at two distances from the mouth of the duct and at detector locations on and off the duct axis. The neutron-spectra calculated with MCNP agree with the measured data with approx. =5 to 50% at all detector locations. The data calculated using the discrete ordinates method are in good agreement with the experiment for the cases where the detector is on axis but are in poor agreement at the off-axis detector locations. The gamma-ray spectra calculated with both radiation transport methods are in good agreement (approx. =5 to 25%, depending on photon energy) with the measured spectra.

• Research Organization: Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831
• OSTI ID: 5794857
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 92:4; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

654003* -- Radiation & Shielding Physics-- Neutron Interactions with Matter
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
ALLOYS
BARYONS
CHROMIUM ALLOYS
COMPUTERIZED SIMULATION
CORROSION RESISTANT ALLOYS
DETECTION
DISCRETE ORDINATE METHOD
DUCTS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GAMMA DETECTION
GAMMA SPECTRA
HADRONS
IRON ALLOYS
IRON BASE ALLOYS
LIQUID SCINTILLATION DETECTORS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 10-100
MONTE CARLO METHOD
NEUTRAL-PARTICLE TRANSPORT
NEUTRON DETECTION
NEUTRON SPECTRA
NEUTRON TRANSPORT
NEUTRONS
NUCLEONS
PHOTONS
RADIATION DETECTION
RADIATION DETECTORS
RADIATION STREAMING
RADIATION TRANSPORT
RESEARCH PROGRAMS
SCINTILLATION COUNTERS
SIMULATION
SPECTRA
STAINLESS STEELS
STEELS
SYMMETRY