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The Fabrication of Clad Massive UO2 Fuel Elements by Coextrusion (Second Quarterly Report)

Technical Report ·
DOI:https://doi.org/10.2172/4177735· OSTI ID:4177735
 [1];  [1]
  1. Nuclear Metals, Inc., Concord, MA (United States)
Two potential types of metal-clad UO2 rods were produced by coextrusion. The first type is stainless steel clad with an intervening graphite layer of 15 mils. The second type has a refractory metal cladding and no interlayer. Tantalum was used in the studies. Both of the above billet designs yield coextrusions having a potential rating of good. The O/U ratio of starting materials with satisfactory extrudability was found to be between 2.00 and 2.10. By decreasing the temperature of the extrusion billet shell, the extrusion force increased to 400/600 tons which in turn increased extrusion pressures to 75/85 tsi. A corresponding change in apparent extrusion constant from 20/25 tsi to 30/ 35 tsi was noted. (For preceding period see NMI2502.)
Research Organization:
Nuclear Metals, Inc., Concord, MA (United States)
Sponsoring Organization:
US Atomic Energy Commission (AEC)
NSA Number:
NSA-14-011949
OSTI ID:
4177735
Report Number(s):
NMI--2505
Country of Publication:
United States
Language:
English