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Record Details

Record 7 of 5134
Angular neutron transport investigation in the HZETRN free-space ion and nucleon transport and shielding computer program
Author and Affiliation:
Singleterry, R. C., Jr.(Argonne National Lab., IL United States)
Wilson, J. W.(NASA Langley Research Center, Hampton, VA United States)
Abstract: Extension of the high charge and energy (HZE) transport computer program HZETRN for angular transport of neutrons is considered. For this paper, only light ion transport, He4 and lighter, will be analyzed using a pure solar proton source. The angular transport calculator is the ANISN/PC program which is being controlled by the HZETRN program. The neutron flux values are compared for straight-ahead transport and angular transport in one dimension. The shield material is aluminum and the target material is water. The thickness of these materials is varied; however, only the largest model calculated is reported which is 50 gm/sq cm of aluminum and 100 gm/sq cm of water. The flux from the ANISN/PC calculation is about two orders of magnitude lower than the flux from HZETRN for very low energy neutrons. It is only a magnitude lower for the neutrons in the 10 to 20 MeV range in the aluminum and two orders lower in the water. The major reason for this difference is in the transport modes: straight-ahead versus angular. The angular treatment allows a longer path length than the straight-ahead approximation. Another reason is the different cross section sets used by the ANISN/PC-BUGLE-80 mode and the HZETRN mode. The next step is to investigate further the differences between the two codes and isolate the differences to just the angular versus straight-ahead transport mode. Then, create a better coupling between the angular neutron transport and the charged particle transport.
Publication Date: Jan 01, 1997
Document ID:
19980210087
(Acquired Sep 05, 1998)
Subject Category: ATOMIC AND MOLECULAR PHYSICS
Report/Patent Number: ANL/ED/CP-93185, CONF-971005-13, DE97-052982
Document Type: Reprint
Publisher Information: United States
Meeting Information: Mathematical Methods and Supercomputing In Nuclear Applications; 6 - 10 Oct. 1997; Saratoga Springs, NY; United States
Contract/Grant/Task Num: W-31-109-ENG-38
Financial Sponsor: Department of Energy; Assistant Secretary for Nuclear Energy; Washington, DC United States
Organization Source: Argonne National Lab.; IL United States
Description: 12p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ELECTRICAL MEASUREMENT; ENERGY TRANSFER; CHARGE TRANSFER; CHARGED PARTICLES; FLUX QUANTIZATION; ELECTRIC POTENTIAL; ALUMINUM; TARGETS; SHIELDING; NEUTRONS; WATER; PROTONS
Availability Source: National Technical Information Service (NTIS)
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