MEASUREMENTS OF SUBCRITICAL REACTIVITY USING A PULSED-NEUTRON SOURCE

Technical Report · Wed Jan 15 00:00:00 EST 1964

DOI:https://doi.org/10.2172/4077017· OSTI ID:4077017

Brown, J. R.

Pulsed neutron source measurements were made for a series of subcritical to critical loadings on a bare U/sup 235/ water assembly in slab geometry. For each loading, the assembly was repetitively pulsed, and the time distribution of thermal neutrons in the core was recorded on time analyzers. From these data, the reciprocal die-away time ( alpha ), the delayed neutron background, and the reactivity of the system were determined. Measurements at various positions in the assembly verified that spatial modes do not affect the reactivity determination. (auth)

• Research Organization: General Atomic Div., General Dynamics Corp. San Diego, Calif.
• DOE Contract Number: AT(04-3)-167
• NSA Number: NSA-18-015471
• OSTI ID: 4077017
• Report Number(s): GA-4838; CONF-187-68
• Resource Relation: Other Information: From American Nuclear Society Meeting, New York, Nov. 1963. Orig. Receipt Date: 31-DEC-64
• Country of Publication: United States
• Language: English

Related Subjects

REACTOR TECHNOLOGY
BACKGROUND
CONFIGURATION
CRITICAL ASSEMBLIES
CRITICALITY
DELAYED NEUTRONS
DISTRIBUTION
MEASURED VALUES
NEUTRON SOURCES
PLATES
PULSE ANALYZERS
PULSES
QUANTITATIVE ANALYSIS
REACTIVITY
REACTOR FUELING
THERMAL NEUTRONS
URANIUM 235
USES
VARIATIONS
WATER