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MEASURING REACTOR NEUTRON SPECTRA WITH THRESHOLD DETECTORS

Technical Report ·
OSTI ID:4148517
The use of threshold detector foils to measure the external neutron spectrum of the Livermore Pool Type Reactor and the KEWB Reactor is described. The foils employed are Pu/sup 239/ to measure the total fast flux, U/sup 238/for the region above l.5 Mev, S/sup 32/ above 2.5 Mev, and Au/sup 197/ for thermal neutrons. Scintillation counters are used to determine the activity induced in the detectors. The foil-counting system is calibrated by using a Cockcroft- Walton accelerator as a fast neutron source. The results indicate a fission type spectrum at each reactor. (auth)
Research Organization:
California. Univ., Livermore. Lawrence Radiation Lab.
DOE Contract Number:
W-7405-ENG-48
NSA Number:
NSA-15-002806
OSTI ID:
4148517
Report Number(s):
UCRL-6089
Country of Publication:
United States
Language:
English