Summarized here are the results of exponential experiments conducted at elevated temperatures on rod lattices of slightly-enriched UO2 moderated by D2O-H2O mixtures. The fuel rods, 4%-enriched UO2 swaged in stainless steel, were 0.476-inch OD by 0. 016-inch wall. The non-moderator-to-moderator volume ratio was 1. 006. The two moderator compositions studied were light water {0% DjO) and a D2O-H2O mixture containing 81.5 mole % D2O. The experimental facility and techniques are described. Material buckling values derived from radial and axial flux measurements are summarized below. 0% D2O
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. 6 Reproducibility Check C O N T E N T S (CONT'D)F i g u r e F i n e Structure Through C o r n e r of SAVANNAH F u e l Bundle W i r e Activities Adjacent t o C o r n e r F u e l P i n s Location Matrix f o r Pin and Wire Positions Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Kadial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Kadial ' P r o i~l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Flux Radial P r o f i l e of Axially Averaged Axial Flux T r a v e r s e Axial Flux T r a v e r s e Axial Flux T r a v e r s e Axial Flux T r a v e r s e Axial Flux T r a v e r s e . Axial Flux T r a v e r s e Axial Flux T r a v e r s e Axial Flux T r a v e r s e Axial Flux T r a v e r s e Axial Flux T r a v e r s e Can ~1 u . rod studies w e r e c a r r i e d out successfully, a s w a s a three-dimensional calculation ,(TKO) to match two c r i t i c a l r o d p a t t e r n s .
. I N T R O D U C T I O NThe extended z e r o power studies 6n the NS SAVANNAH Service C o r e L w e r e conducted by The Babcock a.nd Wilcox Company (B&W) .at i t s Criti...
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