Measurement of the Doppler Temperature Effect in an EBR-I Type Assembly

Technical Report · Tue Jul 01 04:00:00 EDT 1958

DOI:https://doi.org/10.2172/4302965· OSTI ID:4302965

Kato, W. Y. ^[1]; Butler, D. K. ^[1]

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1. Argonne National Lab. (ANL), Lemont, IL (United States)

A measurement of the Doppler temperature effect has been made in the fast spectrum of a mock-up of the EBR-I reactor in ZPR-III. The effect was measured by thermally cycling samples of enriched uranium, natural uranium and plutonium, and detecting the small changes in reactivity. The pile oscillation technique using a resonant detector was employed to measure the small oscillating component of the neutron flux. An upper limit, 0.5 x 10^-8 Δk/ΔT, was obtained for a 506-gram sample of U²³⁵ in the spectrum of an EBR-I mock-up, and for a 235-gram sample of Pu²³⁹ in a plutonium-fueled assembly of the same configuration. The results for natural uranium were inconclusive.

• Research Organization: Argonne National Laboratory (ANL), Lemont, IL (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); US Atomic Energy Commission (AEC)
• DOE Contract Number: W-31109-ENG-38
• NSA Number: NSA-12-017756
• OSTI ID: 4302965
• Report Number(s): ANL-5809
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CONFIGURATION
COUNTERS
DOPPLER EFFECT
EBR-1
ENRICHMENT
Enriched Uranium
FAST NEUTRONS
MEASURED VALUES
MOCKUP
NATURAL URANIUM FUEL
NEUTRON DETECTION
NEUTRON FLUX
Natural Uranium
Neutron Flux
Nuclear Criticality Safety Program (NCSP)
OSCILLATIONS
Oscillation
PLUTONIUM
PLUTONIUM 239
Plutonium
REACTIVITY
REACTOR CORE
REACTOR OSCILLATORS
REACTORS
SPECTRA
SPECTRAL SHIFT
TEMPERATURE
URANIUM
URANIUM 235
ZPR-III