Reactor Physics Quarterly Progress Report: April-June, 1957

Technical Report · Wed Jan 15 00:00:00 EST 1958

DOI:https://doi.org/10.2172/4335853· OSTI ID:4335853

Walske, M. Carl ^[1]; Brown, W. W. ^[1]; Glaubman, M. ^[1]

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1. North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.

The transport mean free path of thermal neutrons in diphenyl has been measured by the boron poisoning method to be 0.80 ± 0.05 cm. This permits calculation of the horizontal buckling for the uranium rod lattices in the 2-1/4-foot-diameter tank, the result being 47.5 ± 0.1 m^-2. This leads to values of 1.3 ± 0.9 and 17.8 ± 0.5 m^-2 respectively for the bucklings of the natural (0.72 per cent) and enriched (0.91 per cent) uranium lattices for which the diphenyl moderator-to-fuel volume ratio is 4. Scintillation equipment is being set up to replace the Geiger counters at present in use for activation analysis. The scintillation equipment is also being adapted for use in resonance escape and fast-effect measurements. (For preceding period see NAA-SR-1974.)

• Research Organization: North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
• Sponsoring Organization: US Atomic Energy Commission (AEC); USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• DOE Contract Number: AT(11-1)-GEN-8
• NSA Number: NSA-12-005003
• OSTI ID: 4335853
• Report Number(s): NAA-SR--2058
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTIVATION ANALYSIS
BORON
BUCKLING
CONFIGURATION
DIFFUSION LENGTH
FAST FISSION FACTOR
GEIGER-MUELLER COUNTERS
MEASURED VALUES
Nuclear Criticality Safety Program (NCSP)
ORGANIC MODERATOR
PHYSICS
POISONING
POLYPHENYLS
REACTORS
RESONANCE ESCAPE PROBABILITY
RODS
SCINTILLATION COUNTERS
THERMAL NEUTRONS
TRANSPORT THEORY
URANIUM