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Title: Hiroshima Air-Over-Ground Analysis: Comparison of DORT and MCNP Calculations

Monte Carlo (MCNP4B) and Discrete Ordinates (DORT) calculations were carried out to estimate {sup 60}Co and {sup 152}Eu activation as a function of ground range due to neutrons emitted from the Hiroshima A-bomb. Results of ORNL DORT and MCNP calculations using RZ cylindrical air-over-ground models are compared with LANL MCNP results obtained with an XYZ air-over-ground model. All of the calculations were carried out using ENDF/B-VI cross-section data and detailed angle and energy resolved neutron emission spectra from the weapon. Favorable agreement was achieved for the {sup 60}Co and {sup 152}Eu activation for ground ranges out to 1000m from the three calculations.
Authors:
Publication Date:
OSTI Identifier:
814271
Report Number(s):
ORNL/TM-2001/160
TRN: US0304235
DOE Contract Number:
AC05-00OR22725
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 4 Sep 2001
Research Org:
ORNL Oak Ridge National Laboratory (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; DISCRETE ORDINATE METHOD; HIROSHIMA; LANL; NEUTRON EMISSION; NEUTRONS; ORNL; SPECTRA