THE EFFECT OF FABRICATION VARIABLES ON THE STRUCTURE AND PROPERTIES OF UO2-STAINLESS STEEL DISPERSION FUEL PLATES

Author:: Paprocki, S. J.
Published:: United States : [publisher not identified], 1959.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1959.
Physical Description:: microopaque : positive ; 8 x 13 cm
Additional Creators:: Cunningham, G. W. and Keller, D. L.

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Summary:

Based on the results of detailed fabrication studies, an evaluation of the effects of varying the type and size of UO/sub 2/ particles, the type and size of stainless steel matrix powders, blending procedures, compacting pressures, sintering times, temperatures, and atmospheres, roll-clading temperatures and reduction rates, total cold reduction, and heat-treating times and temperatures was made for UO/sub 2/stainless steel dispersion fuel elements. Transverse tensile tests, creep-rupture tests, metallographic examination, radiography, density measurements, and x-raydiffraction studies were used to evaluate the structure and properties of the fuel elements. From these studies a reference fabrication procedure for GCRE fuel elements was established. The fuel element core contains minus 100 plus 200-mesh hydrothermal UO/sub 2/ dispersed in an 18-14-2.5 alloy matrix prepared from minus 325-mesh elemental iron, chromium, nickel, and molybdenum powders. Commercial Type 318 stainless steel is used for cladding. Core compacts are sintered in steps to 2300 deg F after cold compacting at 15 tsi. Evacuated picture-frame packs are hot rolled from a hydrogen muffle at 2200 deg F with a 40% reduction in thickness on the first pass and a 20% reduction in thickness on remaining passes. After annealing at 2300 deg F, the fuel elements are given a light pickle and cold reduced 15 to 20% in thickness to give a total reduction of 8 to 1. The final treatment consists of a flat anneal at 2050 deg F. (auth)

Report Numbers:

BMI-1322

Other Subject(s):

Collection:

U.S. Atomic Energy Commission depository collection.

Note:

DOE contract number: W-7405-ENG-92
NSA number: NSA-14-007761
OSTI Identifier 4185452
Research organization: Battelle Memorial Inst., Columbus, Ohio.

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