ORNL-2106 - the Molten Salt Energy Technologies Web Site

PERIOD ENDfNG JUNE 10, 7956
Fig. 3.3.6. Diffusion Couples of Boron-lmn Alloy and lnconel after 500 hr at 13OOOF. (u) The 8-Fe
alloy containing 1% B. (b) The B-Fe alloy containing 3% 6. SOOX. Reduced 7.5%.
steel cores, probably because of excessively high , TUBULARCONTROL RODS
reductions during redrawing.
Additional three-ply billets are being prepared to
investigate the extrusion of hot-pressed cores pre-
M. R. D'Amore J. H. Coobs
R. E. McDonald l2 pared in sections rather than as a single cylinder. The feasibility study on the extrusion of tubular
The billet designs have been revised in an attempt control rods, described previously;13 was conto
improve material recovery. tinued. An lnconel billet can was fabricated, and
The Allegheny Ludlum Steel Corporation has ex- the COT was prepared by tamping a loose powder
truded two 5%-in.-dia, 12-in.-long, three-ply billets. mixture of 369 vol % Lindsay Mix rare-earthsxide
The cermet cores were fractured severely in the particles dispersed in nickel into the billet can.
Fracturing of the outer layer of this three-ply billet
during extrusion at 210OOF resulted in a nonuniform
core, The core was quite dense after extrusion and
appeared to be bonded tu the inner and outer Inel
cladding.
id
early complete, and ry
at is based on metallographic
examinations and hardness and bend test re
reported by the Solid State Division over the
several years. The data were obtained from miniature
fuel elements and subassemblies submitted for
examination by Pratt & Whitney Aircraft, GE-ANPD,
KAPL, and the group at ORNL,
from full-sized MTR and LITR fuel elements. p 163.
"On assignment from Pratt & Whitney Aircraft.
13J. H. Coobs, R. E .McDonald, and M. R. D'Amore,
ANP Quar. frog. Rep. March 10, 1956, ORNL-2061,
171