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Title: Neutron Spectrum Measurements from Irradiations at NCERC

Several irradiations have been conducted on assemblies (COMET/ZEUS and Flattop) at the National Criticality Experiments Research Center (NCERC) located at the Nevada National Security Site (NNSS). Configurations of the assemblies and irradiated materials changed between experiments. Different metallic foils were analyzed using the radioactivation method by gamma-ray spectrometry to understand/characterize the neutron spectra. Results of MCNP calculations are shown. It was concluded that MCNP simulated spectra agree with experimental measurements, with the caveats that some data are limited by statistics at low-energies and some activation foils have low activities.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
1178322
Report Number(s):
LA-UR--15-22740
TRN: US1600133
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: Methods and Applications of Radioanalytical Chemistry, Kailua-Kona, HI (United States), 12-18 Apr 2015
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE/LANL
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; NEUTRON SPECTRA; NEVADA TEST SITE; GAMMA SPECTROSCOPY; FOILS; FLATTOP REACTOR; ZERO POWER REACTORS; CRITICALITY; IRRADIATION; RADIOACTIVATION; COMPUTERIZED SIMULATION neutron spectrum unfolding NCERC flattop