Beam characterization at the Neutron Radiography Facility (NRAD)

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:5306033

Imel, G R; Urbatsch, T

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: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5306033
• Report Number(s): ANL/CP-74822; CONF-9205157--2; ON: DE92014765
• Country of Publication: United States
• Language: English

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ACTINIDE ISO
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
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ALPHA DECAY RADIOISOTOPES
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INDUSTRIAL RADIOGRAPHY
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
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MINUTES LIVING RADIOISOTOPES
MONITORING
NEUTRON BEAMS
NEUTRON RADIOGRAPHY
NEUTRON SPECTRA
NUCLEAR REACTIONS
NUCLEI
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PARTICLE BEAMS
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SPONTANEOUS FISSION RADIOISOTOPES
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YEARS LIVING RADIOISOTOPES