ARMY PACKAGE POWER REACTOR ZERO POWER EXPERIMENTS (ZPE-1)

Technical Report · Fri Feb 01 04:00:00 EST 1957

DOI:https://doi.org/10.2172/4339542· OSTI ID:4339542

Noaks, J. W.; Johnson, W. R.

The complete results of the Army Package Power Reactor Zero Power Experiments performed on the APPR1 core at the Alco Criticality Facility are given. The fully loaded cold clean core, containing 22 480 1 grams of U/sup 235/ , has an excess K of approximately 16%. The temperature coefficient at 170 deg F is approximately --0.67 x 10/sup -4/ DELTA K/ deg F. The presence of fine structure in neutron flux measurements and control rod calibrations is evident and further study of these effects from an academic point of view seems justified. Peak to average flux in the core is as much as 4 to 1 in the tip of the center control rod fuel element. However, flux suppressors placed in the water hole in this region are effective in reducing this value to approximately 3 to 1. (auth)

• Research Organization: Alco Products, Inc., Schenectady, N.Y.
• NSA Number: NSA-12-009393
• OSTI ID: 4339542
• Report Number(s): APAE-8
• Country of Publication: United States
• Language: English

Related Subjects

ABSORPTION
CONTROL ELEMENTS
CRITICAL ASSEMBLIES
FUEL ELEMENTS
MASS
MEASURED VALUES
MULTIPLICATION FACTORS
NEUTRON FLUX
NEUTRONS
PHYSICS
REACTOR CORE
REACTOR FUELING
REACTORS
RODS
SM-1
TEMPERATURE
URANIUM 235
ZONES