Beam characterization at the Neutron Radiography Facility (NRAD)
An ongoing project to characterize the neutron beams at the Neutron Radiography Reactor (NRAD) is described in this paper. The effort has consisted of computer modelling with three dimensional diffusion theory to obtain a trail spectrum, foil activation measurements, and the use of SAND-II unfolding code. It was expected and found that diffusion theory will underpredict the fast flux. However, it is claimed that precise characterization of the entire spectrum is not necessary for comparisons among neutron radiography facilities; rather, the use of simple fast neutron indicators should be adequate. A specific example used at NRAD is the U-235/U-238 fission reaction rate ratio. A ratio such as this could be used in the same manner as the classic gold cadmium ratio for interfacility comparisons with regard to fast neutrons. 5 refs.
- Research Organization:
- Argonne National Lab., Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10149926
- Report Number(s):
- ANL/CP-74822; CONF-9205157-2; ON: DE92014765
- Resource Relation:
- Conference: 4. world conference on neutron radiography,San Francisco, CA (United States),11-14 May 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Beam characterization at the Neutron Radiography Reactor
HEAVY WATER LATTICE PROJECT ANNUAL REPORT
Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
NEUTRON BEAMS
BEAM MONITORING
NEUTRON RADIOGRAPHY
COMPUTERIZED SIMULATION
D CODES
THREE-DIMENSIONAL CALCULATIONS
FOILS
URANIUM 235
URANIUM 238
NUCLEAR REACTIONS
ACTIVATION ANALYSIS
NEUTRON SPECTRA
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220600
DESIGN, FABRICATION, AND OPERATION
RESEARCH
TEST
TRAINING
PRODUCTION
IRRADIATION
MATERIALS TESTING REACTORS