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A Study of Neutron Leakage in Finite ObjectsA computationally efficient 3DHZETRN code capable of simulating High charge (Z) and Energy (HZE) and light ions (including neutrons) under space-like boundary conditions with enhanced neutron and light ion propagation was recently developed for simple shielded objects. Monte Carlo (MC) benchmarks were used to verify the 3DHZETRN methodology in slab and spherical geometry, and it was shown that 3DHZETRN agrees with MC codes to the degree that various MC codes agree among themselves. One limitation in the verification process is that all of the codes (3DHZETRN and three MC codes) utilize different nuclear models/databases. In the present report, the new algorithm, with well-defined convergence criteria, is used to quantify the neutron leakage from simple geometries to provide means of verifying 3D effects and to provide guidance for further code development.
Document ID
20150002822
Document Type
Technical Publication (TP)
Authors
Wilson, John W. (Old Dominion Univ. Norfolk, VA, United States)
Slaba, Tony C. (NASA Langley Research Center Hampton, VA, United States)
Badavi, Francis F. (Old Dominion Univ. Norfolk, VA, United States)
Reddell, Brandon D. (NASA Johnson Space Center Houston, TX, United States)
Bahadori, Amir A. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
March 11, 2015
Publication Date
February 1, 2015
Subject Category
Nuclear Physics
Statistics and Probability
Fluid Mechanics and Thermodynamics
Computer Programming and Software
Report/Patent Number
NF1676L-20828
L-20537
NASA/TP-2015-218692
Funding Number(s)
WBS: WBS 651549.02.07.10
CONTRACT_GRANT: NNX09AR20A
Distribution Limits
Public
Copyright
Public Use Permitted.

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